cgEvan

iTrader: (1)

I just got this '95 Z28 M6 and it seems to have a hesitation under very low throttle at lower RPMs. I can let off the gas and press a little harder and it will skip the hesitation and just go. I replaced the plugs thinking they might be it, since it had a granatelli maf and was running a little rich (also has a brand new GM 3" maf as of today). Unfortunately, it still does the hesitation. At mid-WOT, it pulls hard with no miss or hesitation. SOMETIMES, it throws a CEL for an O2 sensor, but it's a random occurence... could this be causing it?


Thanks for any help!

ss.slp.ls1

iTrader: (36)

I was going to say that it could be your o2's. That would certainly be high on the list of things to replace on a recently bought used fbody.

Also check your fuel pressure and replace your fuel filter.

cgEvan

iTrader: (1)

Will do.

What are the chances it's my opti?

ss.slp.ls1

iTrader: (36)

Very possible, but you want to troubleshoot everything before you jump on the opti.
Even if it is the opti, replaceing the opti is not a big deal.

cgEvan

iTrader: (1)

Exactly. Just the cost of opti and my current situation isn't ideal. lol.

The guy I got the car from is giving me an O2 sensor he bought for it, I'll change the fuel filter... that should be relatively cheap.