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Chevy Silverado and GMC Sierra Fuel Pump/Fuel System

419 messages,  Last post on Jun 12, 2013 at 7:13 PM

You are in the Chevrolet Silverado & GMC Sierra Forum.

What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Truck

Messages Page 21 of 43

#196 of 419 Re: 2001 chevy silverado 1500 4.3 v6 [hiscokid] by biga4

Apr 05, 2008 (9:26 pm)

Replying to: hiscokid (Apr 04, 2008 6:21 pm)
I had a similar problem last week. Truck starts fine when cold but hard starting, or won't start at all when at operating temp. Did some research and found some answers at fullsizechevy.com. A lot of the people posting there had the same issues. Found out the hard starting was caused by a leaking fuel pressure reg. On these 98-01 Sequential fuel injection Vortec engines the spider assembly and FPR are located under the upper intake manifold. once the FPR starts leaking, the fuel collects in the intake manifold and sits there flooding the engine. If the truck sits long enough the fuel will evaporate and the engine will fire. The fix for me was to purchase the upgraded Spider assembly for SFI vortecs, instead of just a FPR. This upgrade does away with the poppet style injecters and replaces them with real injecters and is complete including the FPR (GM#93441235) and is a direct bolt-in. From what I gather GM had to develop this because of problems and a recall in CA with the poppet style injectors getting clogged because of the additives in the fuel there. Since I had it installed I noticed the smoother idle, starts with just a touch of the key, and better throttle response. Haven't checked fuel milage yet but should be back to my normal 17-18 mpg city

#198 of 419 Re: 2001 chevy silverado 1500 4.3 v6 [biga4] by hiscokid

Apr 06, 2008 (8:39 pm)

Replying to: biga4 (Apr 05, 2008 9:26 pm)
My truck just started up the other day and is running fine now, it misses every once and a while but I'm thinking it was bad gas. Where can this upgraded spider assembly be purchased? I heard these poppet style injectors are nothing but problems. thanks.

#199 of 419 Re: 2001 chevy silverado 1500 4.3 v6 [hiscokid] by biga4

Apr 07, 2008 (5:32 pm)

Replying to: hiscokid (Apr 06, 2008 8:39 pm)
I got mine at a local AC Delco supply store, 1/2 price compared to what any dealership wanted. I heard of other people ordering from gmpartsdirect.com for around $260

#200 of 419 ABS problems by mac53

Apr 08, 2008 (7:13 am)

I have a 2000 Sierra 4WD with just over 99000 miles. It has developed a problem with the ABS. At slow speed stops on a dry surface, the ABS kicks on just as the truck comes to a stop. It goes off when I pump the brakes. It doesn't do this on hard stops.

#201 of 419 Re: ABS problems [mac53] by mickeymouse2

Apr 08, 2008 (7:39 am)

Replying to: mac53 (Apr 08, 2008 7:13 am)
Check for a small stone stuck in one of the pulse rings, throwing the sensor info off for one of the sensors. Also check for for a mechanical reason that one of your wheels is turning slower than the others at slow speeds.

#202 of 419 Re: ABS problems [mac53] by jeffsayers

Apr 08, 2008 (1:10 pm)

Replying to: mac53 (Apr 08, 2008 7:13 am)
My 2000 Silverado had a recall on the ABS sensors. They did pretty much the same thing. Call a dealer and have them check. While you're at it, have them check for recall service on the tailgate cables as well; I had mine snap while standing on it! The bad part is I received the recall notice at least a month before that happened. at myself

#203 of 419 '01 1500HD Fuel Pump Replacement by bigd41

Apr 23, 2008 (10:47 am)

My 2001 1500HD with a 6.0 Liter has been getting harder and harder to start to the point of having to floorboard the pedel to get it to crank. The truck has approx 182k miles. After that it would run Ok but a little rough idle. I thought it was my fuel pump and my mechanic confirmed it. I have been reading some issues here where some people were just replacing the "fuel regulator" at a fairly low costs. How hard is it to replace the fuel pump and what is a ball park cost for doing it?

#204 of 419 Hard Starting 5.3L by sierraz71

May 21, 2008 (11:13 pm)

Have a 2001 GMC Sierra 1500,5.3L with 144k miles. Recently developed hard starting problem. No trouble codes present.Cranks with no start until 3rd attempt. Probably would start with one attempt if I didn't let up on starter. Prefer 3 short attempts to avoid damaging starter. Occurs after shutdown of approx 5 minutes or overnight. Will start OK if you shut down and restart immediately. Fuel pump and filter was replaced at 120k miles. Runs fine otherwise from idle to WOT. Have noticed after shutdown,can hear noise in the fuel tank that sounds like fuel pump is still operating or more likely pressurized fuel is returning to the tank. Replaced original plugs and wires since they were long overdue. Truck has run flawless since purchased new. Any ideas where I can start to troubleshoot ?

#205 of 419 96 sierra high idle speed by scout8

May 22, 2008 (5:31 pm)

I have a 96 GMC sierra that speeds up it's idle not at first,but as soon as it warms up,to about 1400 rpm. I also seem to have an excessive amount of vacuum or just very strong vacuum. Other than that it runs well.
This is a 305 with central sequential injection.
Any feedback is highly appreciated!
Thanks

Messages Page 21 of 43

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