1990 Pontiac Trans Sport Logo

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Posted on Dec 15, 2008
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Fuel pump fuse blows quick

Car will not run,find blown fuel pump fuse,put new one in starts fuse gets red hot then blows

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Laurel Smith

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  • Posted on Dec 28, 2015
Laurel Smith
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Could it be over amping from the alternator is pushing 17 amps and it should be 12 amps

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  • Posted on Dec 15, 2008
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You have a short between the fuse and the reset valve . you have to trace the wires in between the fuse box and the fuel reset valve to see if they are pinched and a short is occuring.Follow the wiring from the fuse towards the back .

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1answer

I have a 1994 bonneville 3.8-i replaced my fuel pump recently, i keep having my fuel injector fuse blow, i took the injectors off and tested and cleaned them,the car seems to run real good

If its started to blown fuses after the fuel pump maybe there a wire that got sqeeze between the tank and the body of the car that create a short
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Fuel system fuse blowingI

bad wiring or faulty fuel pump
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Will not start and checked fuel pump no power to fuel pump i also have blown fuse for ecmb that blows as soon as i replace it

ECM B fuse supplies a constant 12v hot at all times to the VCM/PCM and to the fuel pump relay. The fuse is blowing telling you that there is a short to ground somewhere. Try this, take the fuel pump relay out and put a new fuse in. If it doesn't blow put the relay back in and if it blows then try a new relay. The relay may be shorted to ground internaly. Other wise you'll have to trace the wires to the VCM and the pump relay to look for a chafed wire that's contacting metal. The wire coming from the ECM B fuse is orange and has a splice in it going to the pump relay and the VCM/PCM.
Hope this helps.....Andrew
1helpful
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Efi fuse short in a 1993 sr5 pickup. put the fuse in and it'll start sometimes and then blow the fuse right away down the road or it'll just blow the fuse right when i turn it on...

may be the fuel pump short out.
unplug the fuel pump connector to see if the fuse still blow.
if the fuse is not blown when you try to start then the fuel pump is bad
3helpful
4answers

OK i have a 1999 gmc Yukon i just changed the fuel pump spark plugs ing coil control module wires but she still wont crank she starts then shuts off whats wrong HEPL ME PLZ

I suppose that you mean it starts but doesn't continue to run. And if you try to start it right away it'll just crank. The fuel pump is on in crank but not in run ( maybe ). Find the fuel pump relay in the underhood fuse relay panel and use a test light to cheak the pins for power and ground. First with the test light hooked to a good ground, check to see if it works first ( touch the battery positive ) then touch all the pins of the relay ( removed ) One should be hot all the time ( if not the fuel pump fuse is blown) another should be hot with the key on. one of the others will be hot only in crank ( this is the fuel pump) The last other is ground with the engine running after started. The one thats hot in crank put power to it with a jumper wire and start the engine ( it'll run ) the fuel pump also gets turned on by the oil pressure switch and the fuel pump fuse is blown it'll also not run the engine. But it'll run right after it's cranked and quit
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Fuse keeps blowing for fuel pump

The fuel pump is most likely "going bad" -- the motor winding is begining to short and pulling too much current.

Charlie
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No power to fuel pump and the ecmb fuse bows as soon as i put it

Unplug all wires to the distributor, coil, fuel pum and injectors, then see if the fuse blows, if it does, sounds like an ECM failure.
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Fuel pump fuse keeps bpowing

the fuel pump is drawing too much current and is starting to go. Assuming you have correct size fuse. I would replace it.
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