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My car acts like it has a part time fuel pump. Or issue with fuel. It looses power when driving and surges and sometimes dies at a stop light. I starts back up with little problem so far. When you slow down to go over a bump or brake it will try to die as well.. I think it is the fuel pump but not sure. It has had a tume up and and the Idle Air control sensor replaced but we still have problems
Re: My car acts like it has a part time fuel pump. Or...
I WOULD SAY FUEL PUMP REPLACE FUEL FILTER FIRST SEE IF IT HELP PROBLEM.I WOULD CHECK FUEL PRESSURE WHICH SHOULD BE 41 - 47 PSI. CHECK FUEL PRESSURE FIRST BEFORE BUYING NEW FUEL PUMP.
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Could be anything electrical. A weak relay, the coil pack or ignition module, and so on.
You'll need to figure out what is loosing electrical power when it fails to start to know what to test. You might start with the fuel pump relay.
The pump can be running but not pumping any fuel.
When it stops running you will need to figure out if you are loosing spark to the plugs or fuel to the injectors.
FUEL FILTER,,IF IT IS OLD-REPLACE!
FUEL PUMP NOT REALLY SUSPECT.....BUT POSSIBLE AS IN A THERMAL SHORTING (AFTER A SHORT TIME)
YOU HAVE TO DETERMINE WHETHER THIS DELAYED STALL ISSUE, IS COMING FROM A FUEL OR ELECTRICAL MALFUNCTION. IE: ELECTRIC CUT OUT...SUDDEN LOSS OF POWER...FUEL ISSUES: ROUGH RU..THEN SHUTS DOWNNING, BUCKING & SURGING
IF YOUR NOT FIXED...JEFF AT: JLGPROP@!YAHOO.COM THE WORX GROUP L.L.C.
Check all your vacuum hoses especially at the PCV coming off the valve cover it is often over looked. The PCV fits loose either put a new bushing in the cover or add some black tape to the PCV at least until you figure out that might be the issue. Also your timing should be at TDC or 2 degrees plus or minus. Contrary to popular belief You can use a timing light you can see the timing mark know about where it is and line up the fly wheel mark accordingly.
Probably fuel pump issue. if it has 100k or more miles, replace it. test for this would be to check fuel pressure while it is running and acting up, you'll see a marked difference in pressure at times it acts up.
fuel pump or fuel filter. have someone kneel near fuel tank and listen for buzzing noise when ignition is turn on if you hear the sound i would change filter
You will need to run a fuel pressure test on it to see if your fuel pressure is correct. How many miles are on the car and when was the last time the fuel filter was replaced.
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