i just bought a first gen lighning 5.8lt the guy put on msd6al headers, pullys and intake spacer, but i doubt if he had it tuned after that, its a strong eng but it should be stronger, also it has a rough idle and a dead miss plugs, wires, cap/rotor check out good is there a good way to check injector fire farily easy?? and is there a good chip out there for this truck ? HELP!!!!!
There are a few common causes which seem to produce the idle problems in these trucks.
1) Intake leak (somewhere) which causes surging also.
2) PCV valve (back of motor) loose causes rough idle and stalling.
Is your Check engine light on?? is it functional?
as for the power loss, the headers can cause a tq loss. We ended up adding alot of timing to make up the tq I originally loss in my truck after the exhaust modification.
You have alot of chip options, but truthfully you need to find a local tuner to you and have the truck dyno tuned for optimal results. A standard chip is set to to modify settings for a stock truck, the custom tune wil take into consideration your modifications.
thanks man and yes i checked the pcv valve and it was loose and the hose was cracked aswell, i found a bad plug wire as well the check engen light does work however i removed the egr valve so the light stays on now but prior to that it was off thanks for your help which chip is a good one that you can adjust ?? about how much hp does that eng stock produce??