My friend has 98 Z28 and just recently the car started misfiring or something like it and the SES light comes on when this happens. He took it by autozone last night and they said it was misfiring on 3 cylinders and told him to replace the plugs. I thought maybe it could be his coil packs, is there a way to check these with a ohms meter and what should they read? He said it just started and comes and goes. We work nites so I'll be checking back on this later. Any replies are greatly appreciated.Thanks

 

I do not know how to check the coil packs, but if it is coming and going checking them probably won't do any good since the problem might not be occuring when you check them. I also doubt it is the coil packs....they are very well designed.

I would say the plugs are bad...

 

does he have nitrous????

he might have a bent push rod....

 

No nitrous,bone stock daily driver with 88,000 miles.He didn't come to work tonite so I don't know if it died or what.

 

Same thing happened to me. Dealer ran it across the diag. computer and said it was misfiring. They changed the plugs (113 euros for plugs...ouch.). No problems since. Good luck.

 

are the plugs wires correct on the distributor? thats if he changed them recently or the plugs themselves. I swear its the easiest of things that mess your car up. Or thats just my luck.... and i spend countless hours trying to figure whats wrong with it.

 

Not on an LS1

 

damn your in germany.....how many fbody's are there....

 

There are about 5 or 6 around here, can't say about other bases. www.fbodyeurope.org has alot of G.I.s on it. Not a whole lot of euro-spec fbods, though. Not exactly built for the small roads around here. (The autobahns are a diffrent story
)

 

Just move the coils on the cyliders that are missing to 3 different cylinders. If the miss fire now appears on the new cyliders then the coils are bad. If the missfire stays on the same cylinders (with coils that are working) then you have another problem. Hope that made sense.

 

i would kill for an autobahn......im registering at your lil board

 

Same thing happened to a friends 00 SS yesterday- the car has under 28K miles on it. Was driving fine, then at a stop light it back fired a few times and the SES light began flashing...is at the dealership as we speak.

 

I'm having the same problem, It gets worse when I have the HPP3 engine tuning program on. I have changed the sparkplugs, I even tried a friends MAF to see if it help, it hasn't. What do ya'll think about it being an o2 sensor? this all started after I installed long tubes and a 3" true duel straights, I do have the o2 simulator in the back.

 

try figuring out what cylinder it is and then switch the plug wires around....it can possibly be o2 or the 02 sims.....check out the sims and see if they are still there and are not melted or damaged...