Big problem with my 92 Corvette, does not start! Security lights blinking! HELP!! SOS

[Bestdavidd]

thanks my friend, i send emails to painless wiring and they told me the painless wiring has no VATS delete system, is correct, but you must install another ECM, and another stuff to get the car working well, and they told me i need to make working the cluster, with a manual he sends.

i think is too much problem.

my mechanic told me that can be the camshaft sensor or cam sensor, that i need to replace it both.

he told me that in the cherokees, when that sensor fails, the car has everything to start but dont start, same problem than me.

i want to know WHERE are located that sensors, to disarm it and buy it.

anyone knows where are located?

thanks!

My friends!!!!

I FOUND THE PROBLEM!!!!!

Its almost impossible to believe, but here is the story...

I discovered testing... like a MIRACLE!!

My problem non start car, was a bad thing in the fuel pump, i replace it and now starts, but in 1 second turns off, if you accelerate it pumping, the car keep starts like in this video (me is in that video)

http://www.youtube.com/watch?v=JL4b0f9lsB4

put it in full volume to hear.

Okay, now, testing.. i just take off the MEMCAL of the ECM, i turn on the car and guess what?

THE CAR STAYS ON AND PERFECTTTTTTTTTTTTTTTTTTT!!!!!!!!!!!!!! Today i use my car ALL DAY without memcal... and perfect! because fans are activated all the time and the ride is cool

Now, without memcal, i dont know at what speed im going, because is in 0, andddd, my car dont accelerate more than 3.000rpms....

Now, im using my car like this... and PERFECT, but i want to fix it to use my more than 300hp like in the past...

Another quote, I HIGHLY RECOMENDS WALBRO GRANATELLI MOTORSPORT 255LPH FUEL PUMP, AND MSD COMPLETE DISTRIBUTOR! Even if i cant pass 3.000rpms, the car is a beast!! I can do burnouts too! The car changes completely....

Any ideas whats wrong?

[LT4man]

Check out this article: EFI: The ECM and MEMCAL

[Bestdavidd]

Check out this article: EFI: The ECM and MEMCAL

Hello Guys!!!

Im using my car without memcal every day, and perfect! i Cant pass 3.000rpm and i dont know what speed im going but everything is working perfect! im using it daily because i blown my acura´s engine :-( now the acura is in the workshop!

Now, i connect the memcal with the ECM, and the car starts, and everything perfect, but, if you dont accelerate it, it will turns off. THATS ALL THE PROBLEM!

Withouth memcal car starts perfect and runs perfect, but, i cant pass 3.000rpm and i dont know at what speed im going and the car sometimes burns gasoline and has a smell, nothing important.

Now i give to you my friends a little gift, a burnout in my vette WITHOUT PASSING 3.000RPM because i cant! And look at what my toy can do at 3.000rpm!!

http://www.youtube.com/watch?v=Gkq-sVD5OvQ

Now it has new tires, and i dont know if im gonna do this again :-)

Thanks everybody for his help, if i dont gonna get here, my car was in the workshop with 2 tons of dust, now, is working, not perfect, but we are better :-)

[Bestdavidd]

Hello Guys!!!

Im using my car without memcal every day, and perfect! i Cant pass 3.000rpm and i dont know what speed im going but everything is working perfect! im using it daily because i blown my acura´s engine :-( now the acura is in the workshop!

Now, i connect the memcal with the ECM, and the car starts, and everything perfect, but, if you dont accelerate it, it will turns off. THATS ALL THE PROBLEM!

Withouth memcal car starts perfect and runs perfect, but, i cant pass 3.000rpm and i dont know at what speed im going and the car sometimes burns gasoline and has a smell, nothing important.

Now i give to you my friends a little gift, a burnout in my vette WITHOUT PASSING 3.000RPM because i cant! And look at what my toy can do at 3.000rpm!!



http://www.youtube.com/watch?v=Gkq-sVD5OvQ

Now it has new tires, and i dont know if im gonna do this again :-)

Thanks everybody for his help, if i dont gonna get here, my car was in the workshop with 2 tons of dust, now, is working, not perfect, but we are better :-)

Hello my friends!!!

I think nobody here likes my video :-(

well... im now buying the wiring harness of the engine, but i cant find one at good price.

I only find PAINLESS wiring, but that does not work to my car because that wiring is to put a 92 corvette engine in an old car, in a few words.

I need the original, and new, because i dont want to have any doubts in the future...

Please anybody can help me find it? :-)

Thanks

[John Robinson]

404 Errorhis looks to be a direct replacement for your harness.

Speed Scene Chevrolet LT1 350 383 Wiring Harness New | eBayhis looks like what you need also.

Have you checked the Tachometer for accuracy? Looking at the video it looks more like something is acting as a rev limiter. I don't remember if you replaced the ECM but if you did it may have been programmed with one in it.

[Bestdavidd]

404 Errorhis looks to be a direct replacement for your harness.

Speed Scene Chevrolet LT1 350 383 Wiring Harness New | eBayhis looks like what you need also.

Have you checked the Tachometer for accuracy? Looking at the video it looks more like something is acting as a rev limiter. I don't remember if you replaced the ECM but if you did it may have been programmed with one in it.

Hi John!

Yes, i replace my ECM! My memcal is new, my MSD distributor is new, my MSD coil is new, starting module new, etc....

But, the problem now is almost amazing.

The car starts WITHOUT memcal, and runs fine!

If i put the memcal, the car starts, but if i dont accelerate it, it will turn off, and with the memcal it pass the 3.000rpm, you can rev it to the maximum 6.000, so... i dont know if its a sensor, i dont know.

Another thing, without memcal, the TPS and IAC dont works, i know that because i disconnect it and the car dont fail, is the same.

We are more close of the failure :-)

And thanks for the harness but i check this and this will not work for me, this harness is for 94 to 96, look at the ECM connectors :-( i can pay 500$ for a harness, brand new! even a little bit more :-)

[John Robinson]

OK so what you are calling the mem cal is now called the prom(programmable read only memory). When you put the new ecm in did you use the old prom for the new ecm or did you get a new prom. If you are using the old prom the previous owner may have used a computer to reprogram it. By the same logic if you got a new prom it may be programmed wrong.

lOOP STATUS - Tech 1 ~isplays Open or Closed -
"Closed Loop" displayed indicates that the ECM is
controlling fuel delivery according to oxygen sensor
voltage. In "Open Loop," the ECM ignores the oxygen
sensor voltage and bases the amount of fuel to be
delivered on TP sensor, engine coolant, and MAP
sensor inputs only.

As for the car running with the tps disconnected. Looking at how the ecm controls open and closed loop operation you can see that in open loop the ecm ignores the tps etc. So I would guess that you car is running in closed loop all the time.


Look at my last post and click on the 404 to go to another site for the wiring harness

[K & B Special Products]

80-89 used an eprom, 90-93 use a memcal. All ZR-1's use a memcal, as well. The OP has a bad memcal and/or a bad ECM.

[John Robinson]

80-89 used an eprom, 90-93 use a memcal. All ZR-1's use a memcal, as well. The OP has a bad memcal and/or a bad ECM.

I absolutely agree with you. All he needs to know is it's bad whatever it is called. And I would not bet that the new ecm he has is any good.

[Bestdavidd]

I absolutely agree with you. All he needs to know is it's bad whatever it is called. And I would not bet that the new ecm he has is any good.

Thanks John!

But, look at that:

With my old ECM, i had an HYPERTECH chip with the memcal, the memcal connects to the hypertech, if you look at google you will see this.

Okay, with ONLY the memcal the car dont start, in the past, with the hypertech starts! (when he wants)

Now, i have a NEW ECM, and a NEW Memcal! Yes! the car do THE SAME THING with my old hypertech and with my new memcal.

So, i think the problem is not the memcal or the ECM, i think the problem is another stuff.

With the memcal, the car acts like this: http://www.youtube.com/watch?v=JL4b0f9lsB4

This is my car, with the memcal, if i dont accelerate pumping, the car just turns off. This is my failure now, without the memcal, EVERYTHING PERFECT!

Now the car ALWAYS starts :-)

So, this is my problem now, the code 41? was a coil wire broken (inside) for that reason no mechanic can do with the past failure.

Well, now the car throws the code C12, that means EVERYTHING IS PERFECT! And throws that code even when i start the car and i bridge the computer connector with the car ON starting throwing the codes, with the car off, same thing. So, how can the computer can tell me everything is OK when the car fail like that? So, i think an electronic stuff is almost broken but not totally and is working parcially, and for that reason the car throws me ``everythings perfect´´. Im not a mechanic, is just my opinion.

Well im here, can anybody here try with his car starting the car without memcal? to see if the car starts without the memcal only to see this...

Now we are closer to the failure, if i fix my failure here, YOU PEOPLE ARE GENIUS!

[John Robinson]

I believe you put an MSD unit in place of the opti. On the opti there was a wire connector on top of it. What did you do with that wire connector. Did it reconnect to the MSD unit. The reason I ask is what I saw on your video looked an awful lot like how my car ran with that connector not making good connection. On the opti with that connector being right under the heater hose connection when it blew up it watered down the connector and the car would backfire and sputter and run if I feathered the throttle but mostly it just would stop. Also that connectors ground wire goes to the same ground bundle as the TPS. If you look at the information on open and closed loop you will see that the ecm ignores that circuit in closed loop. When you start the car the ecm wants to be in open loop and that is when it wants input from the TPS, Water Temp, and the MAP since they all go to a common ground bundle I would look there first to see if you have a bad ground bundle. When the engine gets to a predetermined temperature the ecm goes to closed loop and no longer needs the TPS, Water Temp or MAP input since it switches to the O2 sensor to maintain fuel and spark. I am not an electric engineer but it seems to me that if the car runs without the memcal in it is being forced to run in closed loop. I base that on the fact that the memcal is programmable read only memory and so I think that is the unit that governs which loop the car is in. By now all of the connectors and wires have been handled several times and the results with this old wiring could be that some are broken. Which could be the cause of you trouble.

[Bestdavidd]

I believe you put an MSD unit in place of the opti. On the opti there was a wire connector on top of it. What did you do with that wire connector. Did it reconnect to the MSD unit. The reason I ask is what I saw on your video looked an awful lot like how my car ran with that connector not making good connection. On the opti with that connector being right under the heater hose connection when it blew up it watered down the connector and the car would backfire and sputter and run if I feathered the throttle but mostly it just would stop. Also that connectors ground wire goes to the same ground bundle as the TPS. If you look at the information on open and closed loop you will see that the ecm ignores that circuit in closed loop. When you start the car the ecm wants to be in open loop and that is when it wants input from the TPS, Water Temp, and the MAP since they all go to a common ground bundle I would look there first to see if you have a bad ground bundle. When the engine gets to a predetermined temperature the ecm goes to closed loop and no longer needs the TPS, Water Temp or MAP input since it switches to the O2 sensor to maintain fuel and spark. I am not an electric engineer but it seems to me that if the car runs without the memcal in it is being forced to run in closed loop. I base that on the fact that the memcal is programmable read only memory and so I think that is the unit that governs which loop the car is in. By now all of the connectors and wires have been handled several times and the results with this old wiring could be that some are broken. Which could be the cause of you trouble.

:O Wowwwww John! You really KNOW about corvettes man!

Im really impressed with that car, is fascinating... if you bridge the scanner connector, you can know if everything works fine, even a bulb! That car is really amazing... really amazing... and is maded by the normal people can do that kind of stuff....No Mercedes i had has that amazing things, so im really impressed with that car....

That car is really complicated like i know about several months ago, but now, i think is more complicated that i thought, thats AMAZING that loops that you are explaining me... im really impressed...

I really think that is the problem of my car, and now, in what wires i need to search to discover my problem? because i really want to fix my car :-( my new wiring i think it arrives in like 1 month, and i would be happy if i repair my car soon. And with your help, i think i can :-)

Now, thats the MSD distributor Story:

When i bought the MSD distributor in USA, it arrived to my country in 3 days because i want it now and i payed 100$ only for the shipment DHL via. The total cost was 780$, complete distributor.

Well... when my beautiful distributor arrives to my home, i inmediately disarm my car, the water pump, and everything, and i put there my new distributor like in the distributor manual says, and everything is perfect, when i connect the MSD connector and the connector on the harness of my car, i see that CANT fit... connector of the wiring has 5 wires and the MSD only 4 and the connectors was tottally diferent... i sent an email to the seller and to a MSD, very upset because in the box says ``92 to 94 LT1 corvettes´´, well they send me that email:

David,
>
> You really need to solder the wires, if you butt connect them, you chance it
> getting loose. Once you cut the wire on the MSD, MSD will not warranty the
> distributor.
>
> All the wires are the same, pin to pin. The PIN locations are very small
> and are cast into the plastic connector. They are the same on the 4-pin
> connector as the 6-pin, so you should not be confused.
>
> Pin 1 on the MSD (brown/yellow wire) goes to Pin A (Blk/red wire) on harness
> Pin 2 on the MSD (brown/orange wire) goes to Pin B (purple/white wire) on
> harness
> Pin 3 on the MSD (red wire) goes to Pin C (yellow wire) on the harness
> Pin 4 on the MSD (red/black wire) goes to Pin D (black/pink wire) on the
> harness
>
> A PDF file is also e-mailed for reference.

I do exactly the same thing, i solder the wires, a perfect job. That is because ONLY THE 92 CORVETTE has a different connector on the DISTRIBUTOR, only the 92, look at that :-) in 93 the connector changed and if my car was 93 i do not will need to solder any wire.... only plug and play....

The MSD distributor has another vaacum lines, that i connected really well, i think was a good job. But, i think discovering the failure that i or the mechanic do something wrong and now the car has that failure, i will like to know why, and what, to fix it :-)

Another thing: Without the memcal, the fans are ALL THE TIME activated, i pass the suich and they work, and works all the time, the 2 fans... so my car is really cool all the time. Sometimes the car throws a smell that my eyes dont like it.... my mechanic told me is ``raw gasoline´´ and only for 1 exhaust, the passengers side one.

Really thanks for everything John, now im waiting to know what i need to do or what wires check to start fixing my car! :-) Read this to know what i did and what i need to do, for the distributor... or my failure.

Another stuff of my car, sometimes the car sounds in the exhaust hard, like an explosion, like if the spark was too much or the gasoline blow up a little bit because the car is not good entonated, and that happens when i accelerate it several times at once.

Another question, if my MSD is not working good because i need another wire or 1 wire is broken, why the car starts? i think that will not work at all and the car will not have spark because the distributor is not working good, or the distributor can works parcially? Well im not a mechanic and i dont know anything about that, i did several jobs on my cars and i like flawless jobs, averything in his place, cleaned and good threated, and if i dont know how to disarm something, i think and i do my best to dont wreck anything... My mechanics dont, it disarms everything fast and sometimes broke a plastic and that things.. well, thats one of the reasons that i like to fix my car :-)

Im here to listen you :-) the people who knows!

[John Robinson]

Follow this chart to verify the wiring is good.

File1.jpgFile.jpgFile4.jpg
Also the chart for the ecm and connector shows were the pin for the blk/pink is. If you take the connector off the ecm you can do a continuity check of that wire from the plug on the distributor. That is the ground wire. When doing the continuity check wiggle the wires to see if you lose continuity.

[K & B Special Products]

:O Wowwwww John! You really KNOW about corvettes man!

Im really impressed with that car, is fascinating... if you bridge the scanner connector, you can know if everything works fine, even a bulb! That car is really amazing... really amazing... and is maded by the normal people can do that kind of stuff....No Mercedes i had has that amazing things, so im really impressed with that car....

That car is really complicated like i know about several months ago, but now, i think is more complicated that i thought, thats AMAZING that loops that you are explaining me... im really impressed...

I really think that is the problem of my car, and now, in what wires i need to search to discover my problem? because i really want to fix my car :-( my new wiring i think it arrives in like 1 month, and i would be happy if i repair my car soon. And with your help, i think i can :-)

Now, thats the MSD distributor Story:

When i bought the MSD distributor in USA, it arrived to my country in 3 days because i want it now and i payed 100$ only for the shipment DHL via. The total cost was 780$, complete distributor.

Well... when my beautiful distributor arrives to my home, i inmediately disarm my car, the water pump, and everything, and i put there my new distributor like in the distributor manual says, and everything is perfect, when i connect the MSD connector and the connector on the harness of my car, i see that CANT fit... connector of the wiring has 5 wires and the MSD only 4 and the connectors was tottally diferent... i sent an email to the seller and to a MSD, very upset because in the box says ``92 to 94 LT1 corvettes´´, well they send me that email:

David,
>
> You really need to solder the wires, if you butt connect them, you chance it
> getting loose. Once you cut the wire on the MSD, MSD will not warranty the
> distributor.
>
> All the wires are the same, pin to pin. The PIN locations are very small
> and are cast into the plastic connector. They are the same on the 4-pin
> connector as the 6-pin, so you should not be confused.
>
> Pin 1 on the MSD (brown/yellow wire) goes to Pin A (Blk/red wire) on harness
> Pin 2 on the MSD (brown/orange wire) goes to Pin B (purple/white wire) on
> harness
> Pin 3 on the MSD (red wire) goes to Pin C (yellow wire) on the harness
> Pin 4 on the MSD (red/black wire) goes to Pin D (black/pink wire) on the
> harness
>
> A PDF file is also e-mailed for reference.

I do exactly the same thing, i solder the wires, a perfect job. That is because ONLY THE 92 CORVETTE has a different connector on the DISTRIBUTOR, only the 92, look at that :-) in 93 the connector changed and if my car was 93 i do not will need to solder any wire.... only plug and play....

The MSD distributor has another vaacum lines, that i connected really well, i think was a good job. But, i think discovering the failure that i or the mechanic do something wrong and now the car has that failure, i will like to know why, and what, to fix it :-)

Another thing: Without the memcal, the fans are ALL THE TIME activated, i pass the suich and they work, and works all the time, the 2 fans... so my car is really cool all the time. Sometimes the car throws a smell that my eyes dont like it.... my mechanic told me is ``raw gasoline´´ and only for 1 exhaust, the passengers side one.

Really thanks for everything John, now im waiting to know what i need to do or what wires check to start fixing my car! :-) Read this to know what i did and what i need to do, for the distributor... or my failure.

Another stuff of my car, sometimes the car sounds in the exhaust hard, like an explosion, like if the spark was too much or the gasoline blow up a little bit because the car is not good entonated, and that happens when i accelerate it several times at once.

Another question, if my MSD is not working good because i need another wire or 1 wire is broken, why the car starts? i think that will not work at all and the car will not have spark because the distributor is not working good, or the distributor can works parcially? Well im not a mechanic and i dont know anything about that, i did several jobs on my cars and i like flawless jobs, averything in his place, cleaned and good threated, and if i dont know how to disarm something, i think and i do my best to dont wreck anything... My mechanics dont, it disarms everything fast and sometimes broke a plastic and that things.. well, thats one of the reasons that i like to fix my car :-)

Im here to listen you :-) the people who knows!

You got robbed! MSD=may suddenly die. Stock, CORRECT Delphi distributor $400!

[Bestdavidd]

You got robbed! MSD=may suddenly die. Stock, CORRECT Delphi distributor $400!

ahaha, i bought MSD because my delphi died because i wash the engine of my car when i wash the car and the distributor had corrosion inside and stop working, for that reason i bought MSD and i have washed my car like 50 times since i put this on it and perfect! And the car has more spark now, i love the MSD one... and has better warranty than delphi, for that reason i bought it!

Now, you scared me my friend ahahahha i hope my MSD least 3 years or more.... i hope so! I dont want less.... ahaha

And another good stuff, with the MSD you can graduate the spark of the car, has a graduator, i dont know what it works but sounds grate... when my car runs perfect i will graduate it for the best way to have more HP with my mechanic :-)