Question about 1998 GMC Jimmy

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The security system shuts off my fuel system - 1998 GMC Jimmy

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  • lsorden Oct 12, 2009

    the passlock system is designed to prevent thief by disabling the fuel system for 10 min. but it is disabling the fuel system when i try to start and only when starting.i wait 10 minutes and it starts everytime.

  • carhob May 11, 2010

    thats what its supposed to do! dou have a question?



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You should have a PassLock security system. This will work:
it worked great for me.

Posted on Apr 12, 2010


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Where is the fuel shut off switch in my 2002 mazda 626

Your vehicle does not have an impact activated fuel shut off switch like the ford vehicles. Power is provided to the fuel pump by the fuel pump relay. Power is provided to the fuel pump relay by the Main relay. Both relays are controlled by the Engine computer or PCM. The PCM can disable the fuel system by not energizing the fuel pump relay if the immobilizer system has been triggered by the use of a non-authorized ignition key being used to start the vehicle. This should also trigger the security light to be flashing on the instrument cluster as well. Look for that rapidly flashing security light to see if this is the problem.

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I put fuel pump ,crank sensor, fuel filter, tune up and I still do the same start and shut off

Does it have a SECURITY system in it ?
Is the SECURITY Light on or Flashing Sparatickly ?
Any Trouble codes ?
POSSIBLE - * MAF sensor (Mass Air Flow Sensor) has gone BAD causing car to start then shut back off . * Security has kicked in ( Due to changing stereo system or battery went dead or didn't have one on it for a little while .
FIXES - *Replace Mass Air Flow Sensor (in between the throttle and the air filter box) . * Take to Dealer and have computer Flashed/Reset if SECURITY is at Fault . I recommend the MAF sensor
Hope this Helps , Flaming Ratchets Auto Repair

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My 2003 Pontiac Grandam will shut down while I'm driving and it has to do with the security system

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Engine starts, but shuts off like the fuel pump is out, good fuel pressure. security light on dash on. ideas?

yes some times a security system will allow car to start and get as far as 5-10 feet and shut down as if out of fuel but the security system acts like it is being stolen. if it is a factory install then call dealer and see if you can overide it with a sequence of procedures.

Jan 16, 2011 | 1993 Jeep Grand Cherokee

1 Answer

My 1994 grand cherokee 4x4 6 cyl. Will start for like 5 sec and then shut right off. i have no idea what the problem is. i think it might be the security system. How do i rip out the security system?

are you sure you have fuel pressure ? alarm systems usually kill the starter circuit not the ignition you need to put a fuel pressure gauge on the fuel rail you should have about 40-45 pounds of fuel pressure . hope this helps

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I bypassed the security system the car still want start I placed a hot wire directly on starter and the car turned over but there was no fuel going up what is the problem now

Try hooking the security system up again so that it's functional, then take out the fuse that's located on the fuse box in the trunk that's associated with the security system. It should be labeled "theft" and it's a 10amp fuse. The system will still function as normal only the horn will not sound if the security system is tripped and it will not shut down the fuel pump.

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I have no spark and no fuel in my 1996 jeep grand cherokee 4.0

problem in security system its in shut off mode.not a home fix dealership has to repair it because they have to use a computer to reset fix the car pcm security system.

May 31, 2009 | 1996 Jeep Grand Cherokee

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