after i installed a k&n, and a edelbrock TES, i noticed if i was getting on it, when i pulled to a stop, i would get a rough idle, but if im just cruzing at light throttle, and pull to a stop, my idle is silky smooth. i feel like my PROM program doesnt quite match my combination. since my engine is running more efficiently at higher rpm, i think the ECM is trying to addjust, but has no real way to adjust the upper rpm with out adjusting the lower as well. and im wondering how you guys handle this, since your mods are even more extreme than mine. do you just put up with it, or do you somehow change the programming?

 

That sounds kinda funky. I would have no Idea what would cause that, but you computer should adjust imidiatly to an idle condition the same way it adjust to full throttle condition from part thrttle or idle.
What I do know is that getting the equipment to program and learning how to do it will pay off big time in the future when you do more mods or custom program for the ones you have now.
good luck in finding what is the deal with you car. Maybe it has something todo woth the extra heat that the engine makes under hard acceleration? Just a thought, doubt that has anything to do with it though.

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86 Trans Am 355 TPI Rebuilt 700R4 with Corvette servo, modified valve body, and a B&M Torque Converter (2000 rpm stall w/ lock up), 87 350 block bored .30 with new crank. Reworked 305 heads with 3-angle valve job. Added in the rebuild was an SLP TPI cam, BBK 58mm Throttle Body,MSD 6A, Hypertech Power Coil,MSD Wires, 1.5 Crane roller tipped rocker arms, SLP Intake Runners and Port matching in upper intake including fully ported plenum, TPIS adjustable fuel pressure regulator @ 46psi, Hooker shorty style headers w/ Thermotech heat wrapping, Custom 3” exhaust with Flowmaster muffler and chrome quad tips, Hypertech Thermomaster Computer chip, K&N open element cone filter on modified MAF per TPIS specs, removal of A/C hardware and added a 1LE firewall cover installed. Also there has been a PST front suspension kit with Hotchkis strut tower brace added.
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everytime i do any mods the first thing i do is go back and play with the timing. it is the first thing that gets messed up with our ecm's for some reason.

lata
tim

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91 Camaro RS-LO3,Auto.
14.215@94.30 w/ 1.917 60'

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kyle. you have 305 heads on a 350? whats your compression?

 

Iknow what ya mean with the rough idle after running hard, my bird did that after I put my 8.8's, and splitfires in it. Ijust put up with it because it didnt affect driveability or power, however since I put in my chip I havent had the problem, so it might have something to do with the programming somewere

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'91 firebird-
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