Need help, again
Thread Starter
12 Second Club
Joined: Aug 2005
Posts: 222
Likes: 0
From: Paradise, Newfoundland
Need help, again My car is missing, kinda like its being held back or something....engine is very rough as it revs...seems that the problem is with cylinder 4...switched, coils, injectors...still have the problem...could this be the computer?
secondly, do Ls1's fire each cylinder individually, or each bank, or i don't know...
...so frustrated!!!
Also, can i use a computer from another year f-body to see if the comptuer is the problem?,
guy at the local part shop said a 99 silverado computer might usiable, that doesn't seem right to me
secondly, do Ls1's fire each cylinder individually, or each bank, or i don't know...
...so frustrated!!!
Also, can i use a computer from another year f-body to see if the comptuer is the problem?,
guy at the local part shop said a 99 silverado computer might usiable, that doesn't seem right to me
Last edited by Justin Gibbons; Apr 8, 2009 at 11:58 AM.
Obviously it looks like it is not getting much fuel, First swap the injector out to another cylinder then check it again, If that plug now shows the same signs then either you have a faulty injector or a wiring issue on that bank...
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Listen to the injector to see if it is firing, doubt it is since the problem stays with that cylinder. More than likely you have a wiring problem (Lt Blue/Blk wire running to the computer)
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TECH Senior Member
Joined: Apr 2002
Posts: 6,080
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From: So.Cal.
See if you get these 2 signals for that cylinder:
- injector (fires the injector)
- coil primary (saturates/fires the coil)
Use a DMM or a test light or whatever... it should indicate a pulsing signal while cranking/running.
If you're missing either of those, work backwards along the wiring, see if there is continuity all the way back to the PCM connector.
- injector (fires the injector)
- coil primary (saturates/fires the coil)
Use a DMM or a test light or whatever... it should indicate a pulsing signal while cranking/running.
If you're missing either of those, work backwards along the wiring, see if there is continuity all the way back to the PCM connector.