Throttle response

Kkirwan71 · Jul 10, 2015

GMC4x4 said:
Have you checked fuel pressure

How do I do that?

Sent from my SM-G900V using Tapatalk

GMC4x4 · Jul 10, 2015

If it's tbi then you need an adapter that goes in place of the fuel filter to hook a gauge to. If it's a vortec then there should be a shrader valve on the fuel rail you can hook a gauge up to. Most auto parts stores have them and some will loan them.

Edit: Just realized that I was on 800 forum. There is definitely a shrader valve on the fuel rail.

Kkirwan71 · Jul 12, 2015

GMC4x4 said:
If it's tbi then you need an adapter that goes in place of the fuel filter to hook a gauge to. If it's a vortec then there should be a shrader valve on the fuel rail you can hook a gauge up to. Most auto parts stores have them and some will loan them.

Edit: Just realized that I was on 800 forum. There is definitely a shrader valve on the fuel rail.

My dad seems to think I need an adapter. Do I?

Sent from my SM-G900V using Tapatalk

GMC4x4 · Jul 12, 2015

No you should have a pressure relief valve on the fuel rail. Looks like a valve stem cap on it.

Kkirwan71 · Jul 12, 2015

I'm doing it next weekend I refuse to pay $45 for a tool I'm going to use once my dad's buddy has one

Sent from my SM-G900V using Tapatalk

GMC4x4 · Jul 12, 2015

Kkirwan71 said:
I'm doing it next weekend I refuse to pay $45 for a tool I'm going to use once my dad's buddy has one

Sent from my SM-G900V using Tapatalk

I think autozone rents them as well as oriellys.

Kkirwan71 · Jul 12, 2015

GMC4x4 said:
I think autozone rents them as well as oriellys.

They don't have just the gauge and hose

Sent from my SM-G900V using Tapatalk

2003tahoe · Jul 13, 2015

i work at autozone what part you need

Kkirwan71 · Jul 14, 2015

2003tahoe said:
i work at autozone what part you need

Fuel pressure tester

Sent from my SM-G900V using Tapatalk

2003tahoe · Jul 15, 2015

27167 is our loan a tool number you could use it in the parking lot if your not in a shady area like houston were they need bouncer type guards at the doors if i remember correctly Edit:
it should be between 100-150

Kkirwan71 · Jul 20, 2015

Figured out it's the idle air control valve. $125 for one

Sent from my SM-G900V using Tapatalk

Redbeard · Dec 15, 2015

My '99 has had a stumble for about 2 1/2 years. I was stupid though, and added a resistor in a maf wire to try to get better mileage. I assume that I messed up the IAT sensor, but I haven't been motivated enough to get a new MAF. If I let it idle a few minutes before I go somewhere, it's not too bad but underpowered for sure.