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have a 1996 gmc yukon with the 5.7, normal driving and startup it does fine and when in park there is no issue but when in drive right at 2k rpm's it acts like it has no power and then around 4k it starts clearing up, has new injectors, fuel rail, fuel filter, cap,rotor, plugs and wires and the SES light came on a few weeks ago saying the bank 2 cat was bad, so i had it replaced and it hasnt been on since. anyone have any idea what the problem might be??
new spider assembly? the updated one?
If you bought the multec-2 upgrade, you should have got the new fuel pressure regulator and installed it.
I assume you installed the new FP regulator.
Maybe your fuel pump is acting weird...
tough to give you decent advice on something like this. check your connections on the fuel pump( difficult, I know).
FWIW my 98 Tahoe started the other morning and ran like dog sh!t for about 5 seconds...no idea what that was from. no codes, nothing. who knows
could be the computer pulling timing...maybe you have some false knocking or something
Quote:
Originally Posted by haveTBIwantLS2
yea the regulator was replaced, im starting to think its something with the timing advance, had it scanned this morning and there were still no codes