4.8 JY build
Thread Starter
TECH Fanatic
Joined: Jul 2010
Posts: 1,678
Likes: 0
4.8 JY build got this JY build done about a month ago.
mods as follows,
4.8 LM7.
LS9 headgaskets.
LS2 cam.
LS2 oil pump/chain.
Lunati dual springs.
LS1 heads.
2 bar map
walbro pump
Cobra blue giants injectors
Coolingmist meth kit.
GT45 turbo.
I put about 100miles on it and it has ran perfect.
till yesterday, i was on the freeway and as soon as i got off it started running like ****. It felt as it was misfiring, and the wideband was showing lean.
I was able to limp it home. Now it wont start, you have to give it gas to keep it at idle but still dies after a couple of seconds.
Fuel pressure is solid at 60psi, never drops while cranking
spark plugs look good.
so the wideband showing full lean has me at a loss.
any help?
mods as follows,
4.8 LM7.
LS9 headgaskets.
LS2 cam.
LS2 oil pump/chain.
Lunati dual springs.
LS1 heads.
2 bar map
walbro pump
Cobra blue giants injectors
Coolingmist meth kit.
GT45 turbo.
I put about 100miles on it and it has ran perfect.
till yesterday, i was on the freeway and as soon as i got off it started running like ****. It felt as it was misfiring, and the wideband was showing lean.
I was able to limp it home. Now it wont start, you have to give it gas to keep it at idle but still dies after a couple of seconds.
Fuel pressure is solid at 60psi, never drops while cranking
spark plugs look good.
so the wideband showing full lean has me at a loss.
any help?
Thread Starter
TECH Fanatic
Joined: Jul 2010
Posts: 1,678
Likes: 0
I changed the injectors now it starts. But running rough.
It doesn't have any vaccum.
Also. Theirs a lot of pressure coming out of the valve covers. When I take off the oil cap the idle goes up. When I have to crank it a lot it shoots the oil dipstick out.
I'm running a vented catch can pulling from each valve cover.
Any ideas??
It doesn't have any vaccum.
Also. Theirs a lot of pressure coming out of the valve covers. When I take off the oil cap the idle goes up. When I have to crank it a lot it shoots the oil dipstick out.
I'm running a vented catch can pulling from each valve cover.
Any ideas??
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