Couple weeks ago had to have my fuel pump replaced. When I got her back she was idling kinda low then normally. Mentioned it to the mechanic and he told me to drive it give time for the computer to adjust. Ok fine did that truck started running fine. Last week while waiting for my wife the Rpms dropped then she shut off. Turned the key and started right up. Then later on that day same thing Rpms dropped then shut off this time it took a couple of cranks to start. Went to home cleaned the maf and throttle body. She ran fine for a couple days then shut off again. This time didn't want to start. Kept cranking but nothing drained the batt. Called my brother in law. Gave me a jump and she started right up. Changed my battery thinking it was old already and wasn't holding charge. Again ran fine then in the Sears parking lot she wouldn't start. Kept cranking and nothing. For some reason I disconnected the battery for a few minutes hooked it back up and she started right up. This has me scratching my head and I really don't want to take her to the mechanic ive given him way too much of my money this year. Any help or opinions would be appreciated!
Low idle shutting off problem.
- Thread starter a4edwin
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Chizzychase
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what rpm is it idling at? mine is usually like right on 500rpm and mine has shut off coming into a parking lot. i let off the gas and it just shut off on me and i cleaned my air filter and it hasnt shut off and idles a little bit better then it used to but i have no ran into the no start problem like you have. if you just have the stock filter id replace it if it looks dirty at all
bottomline2000
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i wouldn't rule out the new fuel pump being bad.. it's happened before. what brand pump? I would have the mechanic check it. The computer shouldn't have to adjust that much.
bottomline2000
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have the fuel pressure checked at the rail..
Chizzychase
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Had low fuel pressure on mine and it was the fuel pump. Replaced it and now it's fine. I'm thinking my coil packs are going bad so that's next on the list
Well she decided not to start anymore!! At least it happened in the drive way and not 15 miles from home with my kids in the truck. Getting her towed to the mechanic now. Let you guys know what's going on later.
bottomline2000
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MikeInValdosta
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When my ECM went out I thought it was fuel pump/filter related. Truth be told, both times my fuel pump and filter went out it was pretty much "worked then it didn't." When my ECM went bad it was a long torturous process. I mean performance and idle gradually became worse.
the ECM isn't cheap but is fairly easy to replace. Not worth paying shop time.
the ECM isn't cheap but is fairly easy to replace. Not worth paying shop time.
SLCHOE
ASE Master Certified + (L1)
So the ECM programs itself in your world? You can replace an ECM but without it programmed to your VIN, it wont run.
Second pumps been running fine I just changed my fuel pressure regulator and the vacuum line that goes to it. Vacuum lines was all worn out. I'm going to be turning the motor soon so i just want things running smooth
bottomline2000
Full Access Member
Make sure that regulator doesn't buzz. I bought the more expensive AC Delco one and it buzzed. Switched to the cheaper BWD branded one and it was fine. Again all new parts.
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ok she's been running fine the last couple weeks. But it happens again no start. Checked the shraeder valve on the fuel rail and nothing came out. Couldn't do anything about it. So I took my car. Got up this morning went out to check her and she started right up. Driving me nuts now
osiris94ej
Full Access Member
Fuel pump relay? Try swapping it with the horn relay. Could have a poor connection in the relay. Or could be even deeper and be the Ignition switch. One or two legs in switch could be making poor/no contact.
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