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Thread: Rough idle

  1. #1
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    1990 Bright red coupe
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    Default Rough idle

    Ok...so now that I have it back running with the new additions, I'm having trouble with rough idle. I was expecting a different idle with the much larger cam, but I can't get it to sit at anything above 400 rpm if I'm lucky and its warmed up. It has a new chip in the ecm to operate the new system. Do I need to adjust the idle control module in the throttle body to better suit the change??? These are some of the changes that I've made...

    TPIS MiniRam Manifold & Corvette Fuel Rail Kit

    - TPIS 52MM Throttle Body

    - TPIS ZZ409 Camshaft 226/226 .520/.520 Lift 112 LSA

    - Dart 180cc Pro1 Aluminum Heads w/ Guide Plates & ARP Rocker Studs

    - 24lb injector Set FlowMatched

    - Aeromotive Intank 340 lph Fuel Pump

    - TPIS Custom PROM

    - Comp Cams Ultra Pro Mag Rocker Set

    - Hardened Push Rod Set
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  2. #2
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    Default

    I found the issue. My tuner found a list of things that need to be done to dial in the timing and idle with the new chip. If anyone is interested I can post it tomorrow when I take it down for tuning.
    Likes JAGwinn liked this post

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