Try to use the dvt function to kill the injectors one at a time. If you hear a difference then your good.
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LBZ odd problem...
- Thread starter Cknight199
- Start date
If the needle is Stuck, won't replacing the needle change that?
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Turned them each off individually and every one responded correctly.
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Just for grins, I would check all of the ground wires... I fought a intermittent fuel knock for over a year. Turns out a ground wire had worked loose at the right front of the engineI was super pissed it was something so simple but grateful to have finally found the issue. My point is to keep it simple, good luck.
I checked those first :/I checked both sides of the block as well as the driver side head. Did I miss any other grounds?
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Here is a video of it doing it in neutral. It's much worse (sounds like a gunshot) when driving down the street. (Currently truck is parked until this gets solved...) http://youtu.be/cbBQXkhPmFQ
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You check the cam reluctor wheel? I would start by checking reluctor wheel cam, then pull valve covers and check out pushrods, rocker arms and valves. I had a lmm that o just installed twin turbos on and drove fine for a day parked it got it in the next day and looked like that video. Ended up being a pushrod broke off where the rocker sits in the cup. Had good compression on all cylinders to.
I was going to pull my injectors and have them tested, but thinking I'll save the change and check the valve train before doing that. Do I need to pull the lower covers or will the top covers give me enough of a view to check everything?
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I've always pulled both but you should be able to see the pushrods, not sure if you will be able to remove rockers though. Someone else may chime in that has done it.
I just don't want to have to replace the lower gasket. They are $$$
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If something was wrong with the rockers wouldn't it be making a shit load of noise though?
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Reuse the lower valve cover gasket it will be fine. And the only times I've had that same issues like i said was running incorrect timing when pulling pilot at every rpm. And once accidently ran like 36 degrees timing at like 2000 rpm
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I can send you the logs if you would like but they look fine IMO. It wouldn't hurt though..
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His timing and pulse climb together almost. I don't remember his exact max pulse I saw but it was say 2600us 25-26* at 4k rpm. Everything in the log came up smooth.
Yep that sounds about right.
There is literally no timing rattle when this is happening either, if I floor it from 1800 rpm, it'll smoke like a train for the entire time until it shifts again, but surprisingly only a little rattle at certain parts. Much less rattle than what it used to sound like
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Pulled the passenger valve cover and everything looks just as good as it did when it was assembled.
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They all check out fine( .011") :/ I have chromoly pushrods as well.
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Is the shaft broken on the turbo? If the wheel falls out its broke lol
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