RGV_Z28

iTrader: (7)

My predator tells me "Multiple Cylinder misfire detected" Any advice on how to fix this. I did just undo my plugs and wires when i put my headers on. Thanks guys.
-John

samz28

probably need to redo the sparks/wires somethings misfiring, get a scan tool that can do per cylinder misfire counter and you'll see it bright as day.

APeteSS

Make sure your plugs are torqued in correctly, after my header install, I noticed that one had rattled loose.

chpmnsws6

iTrader: (70)

or pop ur hood when its all dark out with no lights on. might hafta give the car a rev but you should be able to find the flash of light (from the arc it gives)

WAHUSKER

iTrader: (4)

What does it idle like? If it's rough, then you can easily find which one is loose. But one is porbably just not on all the way. So it's only 'randomly misfiring'. Check all the connections. Many people leave a coil pack or plug wire off/loose when making that mod....

samz28

my mechanic said there was a good reason to use gm motorsport plug wires, no b/s fitment issues. i'll probably take him up on a set. I've heard some aftermarkets just aren't as precise.

SmokingWS6

iTrader: (1)

I've seen a few cars with nothing wrong throw the random misfire code after installing headers. First check to make sure the plugs and wires are ok, if so you'll need to raise your misfire counts or delete the code.

samz28

yah while your there log knock esp if you bought pacesetters rattle rattle GRR