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09-12-2013, 01:57 PM #1
- Join Date
- Sep 2013
>>94' GMC Jimmy fuel pump/ fuel pressure problems.<<
I have a 94' GMC Jimmy, and I believe I'm having problems with the fuel pump.
It starts up just fine every time, but after driving it awhile it starts to act as if it's running out of gas. This happens especially on hills, and it will stall if I don't baby the gas pedal. I've replaced the fuel filter, and the fuel pressure is fluctuating between 45-55 psi.
I think it's the fuel pump dying, my friend thinks it's the regulator, I've heard it could be the coil or a vacuum leak, is there any way to be certain?
Sorry if this sounds like a dumb question, this is my first vehicle!
10-19-2013, 12:23 AM #2
- Join Date
- Dec 2004
- Arlington, Texas, United States
- Blog Entries
Need to move this to the Blazer / Jimmy section.
10 Chevy Traverse LT AWD
02 Chevy Trailblazer LS (110K+ miles - loaded except for 4WD - WRECKED!)
99 Chevy Cavalier LS (105K+ miles - commuter car)
78 Chevy Suburban Silverado (454, 3/4 ton)
62 GMC 3/4 ton Pickup (350 police interceptor)
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10-23-2013, 05:58 PM #3
1995 Silverado 4x4
6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge
2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
2002 Silverado ext cab 2wd (Sold)
2003 Yukon XL (Totaled)
10-23-2013, 09:46 PM #4
Not sure if thats a fuel pump or not but in a 98 and 99 jimmy I had, usually the fuel pump if it was getting weak wouldnt start it because it required 65psi to start and only 55psi to run. but the 99 was doing exactly what your describing. mine would start up and run and as soon as it started to get warm it would lose power and could only go about 10-15mph and barely if at all make a hill. Wait for it to cool down. start right up go for a bit until warm then back to 10mph. thought it was vacumn line related or something that changes at almost running temperature. Never found out what it was I sold it!!!
2011 Silverado CrewCab 5.3L*Ram Air Look Cowl Induction Reflexxion Hood*6" Pro Comp Lift*Flowmaster Dual exhaust*Perfect Launch Rear Diff. Cover*Led Smoke Taillights*L.E.D.Smoke 3rd Brakelight*60" L.E.D. Tailgate Bar*Rearview Mirror Reverse Camera and Sensors*Smoke Headlight Covers*Front Bumper Grill Insert*Deezee Black Alum. Diamond Rail covers*20" Ultra Motorsports Rims wrapped with 35.5"B.F. Goodrich Tires*Inchannel Raingaurds*CAI*Bullydog GT Tuner*Alpine Amp*Boss 6x9's*Boston Acoustic Subs*Terrantula Tweeters*Custom Sub box*Red Led Interior Accents*5% Ultimacool duo tint rear window and doors, 20% front doors*Custom Vinyl Graphics*Demolded*Debadged*Painted drums and calipers*
Future Mods Include: Custom Interior Hydrographics, Electronic Rollup Toneau Cover, 4.56 Gears, Painted rear bumper