motor issues

[haveTBIwantLS2]

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

[haveTBIwantLS2]

could be the computer pulling timing...maybe you have some false knocking or something

[timothy_james07]

could be the computer pulling timing...maybe you have some false knocking or something

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