SSKILLER5.0

Got a 89 lx 5.0(sorry put 91 in the title for some reason) and cannot figure out why it is dumping raw fuel. I found some injectors with cracked heads. Replaced the injectors, the regulator, and the maf. Also got an sct 4bank chip to tune it to the new parts and injectors. Turn it on exact same problem as before I started. I don't know what else that could be causing it other than the harness itself or the ecm. Just reaching out before I go and replace those parts in case I am missing something..thanks

uedlose

what does the wide band say it is running at? What injector and what MASS air and what is the rest of the build?

SSKILLER5.0

haven't checked the af. These is definitely an issue it dumps fuel directly from the start of the motor. Simple build at this point. 30lb injectors matching bbk maf housing cai ford racing cam exhaust and that's it. Car had never been touched. It started this before the parts were added. When I found the cracked injectors I figured that was it..I figured wrong..and when I say dumping fuel I mean dumping fuel..its rough

uedlose

does it clean up when you rev it? What is fuel pressure set at? 30# injector is pretty big for no more build then you have. Have you fouled out the plugs?

SSKILLER5.0

no it doesn't clean up it continues to dump. I'm sure the plugs are fouled out. Yea I know that's a big injector for what I currently have however i'm not done. Didn't want to buy injectors twice and having the cracked ones forced my hand on that one. its an o.e. non adjustable pressure regulator so whatever the o.e pressure is that is what it should be running at. I assume its 40psi or so..

SSKILLER5.0

oxygen sensors are new as well..

uedlose

I would take a look at fuel pressure first. New dont always mean good. check the HGO ground on the back of the intake to make sure it is not damaged. it is on the driver side in the back. then start looking at other grounds also. Have you run the codes on it yet? also check to make sure there is not a vac line on the MAP sensor. Try clocking the mass air also and see if that changes things some. Clean the plugs or replace them

SSKILLER5.0

funny thing is that there are no codes at all..no check engine light no nothing. I will check the fuel pressure..will try the plugs..funny you mention that ground..when I removed the intake to install the injectors that ground was just draped across the top of one of the head bolts..i did bolt it down under one of the head bolts but I guess that doesn't mean it isn't damaged

SSKILLER5.0

there was one place during re installation that I couldn't remember if you know..does the vaccum lead on the fuel regulator run to the small port behind the intake manifold?

uedlose

the vac to the FPR is ok in that location. Also I am not talking about the ground strap to the body that is back there but the ground that goes into the ecm harness just so I dont confuse you if I am. but good you hooked up the other ground also if that is what you are talking about. What part of VA are you in?