sliderbkt

iTrader: (10)

I just installed a 408 and have had trouble getting it to run.

It has a good starter tune, so I don't think that is the problem.

It will start and run rough for about 3 seconds and then stop. After checking the plugs, they are fouled and wet.

After, putting in fresh plugs, and a better tune I was able to get it to run for about 10 seconds. This time I could feel the headers and tell that only 4 cyl are firing. 2358 are the only ones firing.

Is there anything specific that cause this? Or, do I need to start chasing sensors?

Thanks for your help.

BlownChevy

iTrader: (20)

make sure all of your coils are plugged in, and all of your grounds are hooked up.

tarinitup

iTrader: (11)

Are all the coils plugged in and working?

sliderbkt

iTrader: (10)

Coils and grounds are all plugged in. I'll Double check they are firing, but I'll pretty sure they are.

BlownChevy

iTrader: (20)

if you have 4 plugs on one side that are not firing.....I think you have a set of coils not plugged in.

sliderbkt

iTrader: (10)

OK, I've got an ignition tester and noid light slined up for this afternoon.

Would cam or crank sensor cause this?

sliderbkt

iTrader: (10)

2,3,5,8 are firing. Not on the same side. That would be nice though

BlownChevy

iTrader: (20)

opps missed that

sliderbkt

iTrader: (10)

Ok , you guys called it. The dead cylinder's coils aren't firing. I'll hit the search and see if I can find the cause.