Leaking fuel injectors

MalcolmV8 · Post by **MalcolmV8** » Thu Dec 27, 2007 10:19 am

If you have a leaking fuel injector, in general, can it cause hard starts?

cgrey8 · Post by **cgrey8** » Thu Dec 27, 2007 10:31 am

If it's only 1 injector, I'd imagine the others would still fire and turn the motor over even if one was flooding. However if it's leaking so badly that it's cylinder locking the piston, then you would hear that during crank by the engine turning over fine then having trouble turning over on one cylinder. But it'd have to be leaking a fair amount for that to happen?

What's this happening on? If it's the AWD truck, my guess is that you are leaning out on really cold starts. I had to enrich my fuel startup table in my tune for that very reason. Except in my case, the engine would crank, but like 1 second after the engine turned over, it would drop to less than 500RPMs and stumble lean really badly. Sometimes, it'd conk out completely. Then after about 3 seconds of stumbling, it was fine. After a few tweaks to the Fuel Startup Enrichment table in the tune, that ended all that nonsense.

cjcnomor4 · Post by **cjcnomor4** » Thu Dec 27, 2007 11:26 am

it will drop fuel pressure and crank until pressure builds again

MalcolmV8 · Post by **MalcolmV8** » Thu Dec 27, 2007 10:25 pm

Thanks for the replies, no not my truck. Someone else's car, just checking my info