ok I have a 97 Camaro z28 lt1, following mods are ls1 intake, msd opti and wires, acdelco plugs, 12 bolt rear end, t56 6-speed, ported and polished heads, bigger maf 52mm, bbk throttle body, stage 2 clutch, comp cam 293/313..

now when I drive down the road it stutters a bit until about 2300-2500 then lot of power out of nowhere, and when holding steady speeds it will stumble and jerk a tiny bit until I let of pedel.. and runs fine at wot?

could this be to big of cam? or some sort of vacuum leak or loose plugs?

 

huh?

 

Has it just started acting this way or has it done it from the onset of adding what mods? Is it tuned for the cam and is the maf calibrated correct?


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Are u sure that is the right cam specs. For a 350 that cam is way oversized. I have the gm847 and I'm pushing it with a 355....

Also you said it works perfect at WOT try the o2 sensors since the computer does not use them at WOT.

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Assuming he means the ls1 intake lid and filter not the intake manifold..

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Also I'm not to keen about the msd optis they tend to "fall apart" there's nothing like a good lol ac delco

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Ah, I see. Thanks

 

I had the same issues after installing new headers. The factory coating inside the headers burned off and ruined the O2 sensors.

 

Me to

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It drove me nuts for a week till I broke down and bought new O2 sensors.