I fixed a known problems with the fuel pump connector under the driver seat, and it seem to work for a while but then it began to do it again. Does it sound like the fuel pump is going out??
2006-08-27 14:00:01 · 10 answers · asked by F R 1 in Cars & Transportation ➔ Maintenance & Repairs
Here are the details,
1. no PCM codes, at the beging it had a code for the evaporator system but after fixing the connector problem it went away.
2. Start up, get going and a while later most of the time after it is warm it starts to sputer and the RPM goes erratic and some time it even dies.
3. Some times it happens when you try to punch the gas and go other times even if you are nice to it.
4. Someone suggested that the fuel pump may be going out...
2006-08-28 10:26:19 · update #1
check the fuel pressure some time the injectors will not fire if the pressure is not where its suposed to be, which is around 45- 60 psi also check the idle -air control motor or the t.p.s.
2006-09-04 13:39:59 · answer #1 · answered by ? 2 · 0⤊ 0⤋
I would go with the evaporator system. Believe it or not, if you get a code from the computer, it is what is wrong 99% of the time. A faulty gas cap is probably the reason for the code. If you have a vacuum leak, and your fuel pump pressure regulator operates from a vacuum source, then this will be your problem. I would check for a vacuum leak. Look for old rotted hose, split end where they plug on, a hose that fits a fitting real loose, and needs cut off and put back on. Try to inspect every vacuum hose on the vehicle, by following them and looking for the culprit. A fuel pump (most of the time) will either work or not work, and it doesn't have an in between. If the connector you repaired resolved the problem, I would suggest get a meter, or test light and use a long wire to tap into the line feeding the pump close to the fuel tank, or the pump. Drive the vehicle and when it is acting up, watch the light or meter to see if it is loosing power. If it is, you need to do two things. First: follow the fuel line from the tank checking the hose fittings for cracks or breaks. Second: Follow the power source from the tank to the regulator, and if you don't find a short circuit, suspect the regulator is bad. If you have a constant power to the pump, then you will need to put a fuel pressure gauge on the rail to see if you are loosing pressure. If so, replace the pump. If it totally stops running, try getting a can of choke/carburetor cleaner in a spray can, remove the snorkel, shoot 2 seconds of spray into the intake of the snorkle, now try starting the engine, if it fires monentairly and then stops again, you have a bad pump. DO NOT spray this stuff into the engine while trying to start it, because it could cause you to get serioulsly hurt from fire, or explosion of the can. Always use extreme caution with this stuff. I'm a certified master mechanic, and hope you can resolve the problem from my instructions. Good Luck!
2006-09-04 02:29:01 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Let me go on record as saying the gm has crappy fuel pumps from the beginning-however you need to scan the pcm for codes and get correct interpretations for them-the codes can be mfg-specific,even though they are uniform codes-eg aP0301 IS A GENERIC IGNITION CODE-BUT A p1301 IS A CODE FOR THE SAME CYLINDER MISFIRE,but can vary,say,between a honda and a chevy enough to lead you in the wrong direction-any professional will tell you this.so,check first:fuel pump pressure and volume-if ok,try the scanner-if ok,try checking electrical connections for intermittent probs-sometimes hard to find! If you are not comfortable with these steps,go to a pro for a diagnostic-actually is better-you won't replace parts on a "best guess" basis-and you will get a warranty with the repairs-good luck!
2006-09-04 00:49:01 · answer #3 · answered by Anonymous · 0⤊ 0⤋
I don't know much about your Montana, but that pump may need replaced. You could find it in a salvage yard for cheap, but risk it not working, or you could go to the Pontiac Dealership and have their mechanics look at it or replace it. My mom's 94 Plymouth Grand Voyager's transmission kept going out, so we're selling it; we had tranny work done to it once or twice but it eventually didn't solve anything. I later found that the tranny on that van was "the problem piece" it goes bad in just a few short years on all the vans, so your pump could just be "the problem piece".
2006-09-03 22:07:38 · answer #4 · answered by mopar-man 3 · 0⤊ 1⤋
You don't tell us what it is doing or how it is behaving when it fails. If you can get to someone who can read the PCM codes, you would be able to tell by the code (running lean, and a very high fuel trim addition) or perhaps something else (MAF?).
2006-08-27 14:05:26 · answer #5 · answered by Ironhand 6 · 0⤊ 0⤋
Could be many of things, fuel pump relay, wiring, Ecu, or yeah fuel pump... not likley in a 2000 tho but ya never no whith gm vehicles
2006-08-27 14:05:23 · answer #6 · answered by drkadrk 2 · 0⤊ 0⤋
I had similar symptoms with my Dodge Daytona. Went round and round with it for months and it finally turned out to be the distributor was worn. Take the distributor cap off and try to wiggle the rotor, left right, up and down. There shouldn't be any play.
2006-09-04 09:48:06 · answer #7 · answered by g_riz 2 · 0⤊ 0⤋
You need to take your car somewhere where it can be read by a computer. Chances are this can find the problem. Some car parts stores will connect their computer to you're car for free!
2006-08-31 13:15:08 · answer #8 · answered by cmfeuers 2 · 0⤊ 0⤋
check your fuel pressure,grounds,all map,maf(if applicable)sensor readings.ignition control module.all relays and fuses for fuel pump.
2006-09-03 16:22:41 · answer #9 · answered by lani boy 1 · 0⤊ 0⤋
Accelerator cable issues?
2006-09-03 14:42:39 · answer #10 · answered by Anonymous · 0⤊ 0⤋