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| C4 Technical and Performance For technical and performance related discussion of 1984 - 1996 Corvettes. |
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03-12-02, 08:39 PM
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#1 (permalink)
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Guest
Posts: n/a
My Corvette(s):
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84 still runs like poohay
Yeah, I need to spend my money on an exhaust when my car cant beat a rustang. Heres the story....new EGR, recently tuned, no check engine light (was recently replaced as well), and stock ignition.
I hit the gas quick and hard and it sometimes goes *pup* and dies. I am in P and tap the gas hard...*pup*pup*, dies. I hit the gas sweetly, then hard, it gets to about 3000-3500 rpm, sputters and slows WAY down.
It almost seems as though it is getting starved of fuel. It is a stock and original fuel pump and I know people have said to UG to a 85+. I dont know. Any Ideas??
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03-12-02, 08:43 PM
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#2 (permalink)
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Guest
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My Corvette(s):
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....and please dont say its the tranny.
Well I guess you can if it is............just sugar-coat it.
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03-12-02, 09:01 PM
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#3 (permalink)
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Motor head!!!!
Join Date: Feb 2001
Location: Valencia, CA,USA
Posts: 3,241
My Corvette(s): 1988 Convert/1973 coupe 4 speed/1964 Vert!
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No not tranny
Could be the timing, or cap & rotor, or coil or a combo of the above.
Time to get out the timing light....
When did you change the fuel filter?
And I think you will have to pull the fuel pump
( inspect pick up sock )
How many miles?
Mike
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03-12-02, 09:09 PM
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#4 (permalink)
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Guest
Posts: n/a
My Corvette(s):
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No timing light..about 6 months ago...Pick up sock  and 89,000
Cap, rotor and coil huh...I was going to install an Accel setup for that anyways.
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03-12-02, 09:15 PM
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#5 (permalink)
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Guest
Posts: n/a
My Corvette(s):
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Duhhh! I should look before clicking!
Ok the pickup sock through deduction and reading the thread correctly is in the tank.. another question. If I was to install a hypertech in-line pump w/o yanking the oem pump. What would that do?
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03-12-02, 09:23 PM
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#6 (permalink)
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Motor head!!!!
Join Date: Feb 2001
Location: Valencia, CA,USA
Posts: 3,241
My Corvette(s): 1988 Convert/1973 coupe 4 speed/1964 Vert!
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Duhhhhhh ( part Deux )
IF you sock is plugged you need to fix that BEFORE you add another pump!
And if you want more fuel flow you can get a bigger pump ( 86 & up) but the engine ( stock) can't use what it's got for stock anyway.
Mike
LOL!
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03-12-02, 10:08 PM
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#7 (permalink)
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Motor head!!!!
Join Date: Feb 2001
Location: Valencia, CA,USA
Posts: 3,241
My Corvette(s): 1988 Convert/1973 coupe 4 speed/1964 Vert!
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Well Len that's a good theory
However I have seen a LOT which cake up with debris( rust, scale,taco bell hot sauce wrappers) and get sucked into the pump entrance sufficating the intake.
Still trying to figgure out the hot sauce wrapper one to this day.
Mike
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03-13-02, 12:44 AM
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#8 (permalink)
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Guest
Posts: n/a
My Corvette(s):
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OMG!
My luck I do have a hot sauce wrapper in my tank. Unfortunatley I will have to check it tomorrow sometime.
Awww! Make that Thursday.
Thanks for the input McYall!
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03-13-02, 07:59 AM
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#9 (permalink)
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Member
Join Date: Oct 2001
Location: Boston, MA
Posts: 1,302
My Corvette(s): 85 bright red coupe 82 black
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Were you having this problem prior to having the work you listed done?
Carlo
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03-13-02, 11:14 AM
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#10 (permalink)
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Guest
Posts: n/a
My Corvette(s):
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nope
This all happened after it was "tuned" up and had a new knock sensor and plugs and then was smogged
So about two months
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03-13-02, 11:36 AM
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#11 (permalink)
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Member
Join Date: Oct 2001
Location: Boston, MA
Posts: 1,302
My Corvette(s): 85 bright red coupe 82 black
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Just a thought, but a bad EGR can wreak havoc and look like a thousand other items. Possibly the replacement was not done properly? In addition,it would be no surprise if a faulty EGR does not pull a code.
Just a thought
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03-13-02, 12:31 PM
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#12 (permalink)
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Guest
Posts: n/a
My Corvette(s):
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Well hell
I did replace what seemed to be a decent EGR about two weeks ago. I dont think I screwed it up because it is a rather simple install. (four years ago I rebuilt an engine from bare block under Coors/Shlitz induced inebreation and it still runs
I was told that it might be the solenoid
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03-13-02, 01:44 PM
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#13 (permalink)
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Member
Join Date: Oct 2001
Location: Boston, MA
Posts: 1,302
My Corvette(s): 85 bright red coupe 82 black
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Didn't know you did the work yourself. I'll take a look tonight at the TBI diagnostic and see what they have for the symptom.
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03-13-02, 06:33 PM
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#15 (permalink)
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Member
Join Date: Oct 2001
Location: Boston, MA
Posts: 1,302
My Corvette(s): 85 bright red coupe 82 black
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No easy answers in the manual. Fuel,EGR,leak at manifold. Take your pick. If you need diagnostic guide shoot me an e-mail. This is from my 82 TBI but should be quite similar. You may want to check.
Good Luck
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