Question about 1989 Jeep Comanche

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Where is the fuel pump regulator located, the truck starts but wont stay running

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  • gerald darling
    gerald darling May 11, 2010

    what engine do you have



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  • Jeep Master
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If you have a throttle body injection it's on the throttle body. If you have port injection, it's on the end of the fuel rail.

Posted on Jun 27, 2009


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1 Answer

Were is the fuel filter located

the filter has to be really blocked to prevent fuel flow and even then the cart will idle
I suspect the your fuel pump is a problem either from a faulty fuel pressure regulator or relay for the fuel pump
I am not saying that it is not the fuel pump , just to check the other things first

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The fuel pump will still be working after the engine starts as it is required to produce fuel pressure for the engine to run under all load conditions. How hard it runs is determined by the load and rpms. If the regulator is faulty there will be problems with starting and performance. However it would be advisable to have a pressure test done on the fuel manifold to check the pump, regulator and filters

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diesel engines high pressure pumps not suppose run dry.diesel fuel keep high pressure pump cool and lubricated.problem could be fuel pressure regulator in the fuel filter water separator housing.replace fuel filter see if it helps problem could be fuel pressure regulator in fuel filter housing, the fuel pressure regulator has a air bleed orifice that allows vent to the fuel tank.make sure fuel pump fuse okay pump getting power. i would let garage or dealership check it out if all fails because your diesel engine fuel timing is pcm controlled if let fuel system go dry you probably have to have fuel injection timing reset or could have damage high pressure pump letting it run dry i hope thats not the case because high pressure pump not cheap part i hope it not that.

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Parked the truck and now it wont start,,new fuel pump/filter.will run for a min if sprayed with starting fluid but wont stay running yes has gas in it 1995 chevy s10 4 cyl

check change the fuel filter and check the vacumn to the fuel pressure regulator also check the fuel lines to make sure one isnt collapsed as well

Jan 21, 2010 | 1995 Chevrolet S-10 CA Edition

1 Answer

I have a 97 blazer and i changed the fuel filter and i can hear the fuel pump turn on but it still wont stay started. i also put some fuel in the carb and it started for about 5 seconds and then it wont...

I would more likely think that the fuel pump is the problem. The regulator bring the pressure down, so the vehicle would run, just rich. Disconnect fuel feed line to see if fuel is reaching the engine. If not the pump is the problem.

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Where is my fuel pressure regulator at?

Its located on the fuel rail assembly, under the hood near the throttle body.

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Jan 31, 2009 | 2001 Chevrolet Tahoe

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1985 conrvette

poss. is fuel pressure reg. problem. put a guage on the test port and check press. should be above 35psi. see if it stays running when you spray choke cleaner in the pcv valve steadily while starting. if the engine stays running after a few seconds of running on choke cleaner then probably a bad fuel pump relay cause the oil pressure switch will keep the pump on without the relay when it has good oil pressure.
let me know if ya can do this or if it helps.

Jul 04, 2008 | 1985 Chevrolet Corvette

1 Answer

Car would start but not kicking over

Check your fuel pessure first It should be at LEAST 60 PSI if your not getting that and it usually is around 45 to 55 and its will not run good if its in that range and may not run at all. That year seems to have a problem with those pumps I have replaced many of those noisie pumps always making a humming sound, I would think its your fuel pump and not the regulator but Its found on the fuel rail on top the motor under the plastic. Hope that Gets you running

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