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Injector fuse keeps blowing (HELP!!!)

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Old Jul 21, 2007 | 04:04 AM
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SSBalt07's Avatar
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From: Catonsville MD
Injector fuse keeps blowing (HELP!!!)

so last night i was driving and comin to a stop when all a suddden my car cuts out.. not gettin any response from the gas pedal. well i checked the fuse and my injector fuse had blown.... replaced it. started right up and drove normal. well tonight i was gettin on the highway when it did it again. and i fixed it the same way. drove fine for about 15 miles then did it again. This time i drove less than a block and it did it. Then after replacing the fuse agan i went about 30ft and it blew. So then i replaced it again. Went about 2 blocks and said im not even gonna try and get it home. So i parked it and got a ride....

anyone ever have this problem. I have an exhuast and if its an easy fix i would rather not take it to GM cause they will probly just black book my warrent.
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Old Aug 9, 2008 | 04:35 PM
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From: Bako CA
anyone else have this problem? its happening to me too

had to resurrect it

can i replace this fuse with a 15 Amp?
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Old Aug 9, 2008 | 04:40 PM
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From: kansas city
if you put a bigger fuse in it you're going to create more problems. you have a short in that circuit that you need to find. check the harness for the fuel injectors, where the connector is between the fuse block and the engine. theres a part of the wiring harness that rubs on a bracket that holds an air condition line, it may have rubbed through and is shorting out.
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Old Aug 9, 2008 | 05:35 PM
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From: Bako CA
just checked everything, down low, up high, every wire loom is in perfect condition, no wires are even burned or anything like that. no wires are touching anything hot. let the engine run for a little while, revved it up a bit, bam engine stopped running, fuse blew again.

can anybody help me out here? this is right after i got the trifecta tune, does anyone have any ideas as to why this little fuse keeps going out????????????????


Last edited by bridfi; Aug 9, 2008 at 05:36 PM. Reason: Automerged Doublepost
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Old Aug 9, 2008 | 05:39 PM
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From: SK
Check the resistance on the injectors should be around 12-15 ohms i believe. If less your fuse could blow cause the injector is bad.

Check the wiring and connections to make sure there is no damage.
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Old Aug 9, 2008 | 06:50 PM
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From: Bako CA
Originally Posted by Red2.4SS
Check the resistance on the injectors should be around 12-15 ohms i believe. If less your fuse could blow cause the injector is bad.

Check the wiring and connections to make sure there is no damage.
went and bought a multimeter. ohm rating is from 13.8-14.5 across all 4. injectors are good.







annnnyyyyy ooooottthhheerr iiddddeeaasss????
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Old Aug 9, 2008 | 06:53 PM
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From: SK
Originally Posted by bridfi
went and bought a multimeter. ohm rating is from 13.8-14.5 across all 4. injectors are good.







annnnyyyyy ooooottthhheerr iiddddeeaasss????
Did you check the wires for shorts with the continuity tester?

Make sure there are not shorts in the wires?

Check the connectors and make sure they are all good and clean and tight!

That can cause extra load on the circuit if its arcing or has a poor connection.
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Old Aug 9, 2008 | 07:26 PM
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From: Bako CA
connections are all good.

put a 15A in the slot, blew out also.


it seems to only happen when the car tries to die (bouncing around between 300-1300 rpms)............................................

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Old Aug 9, 2008 | 08:16 PM
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From: SK
Originally Posted by bridfi
connections are all good.

put a 15A in the slot, blew out also.


it seems to only happen when the car tries to die (bouncing around between 300-1300 rpms)............................................

Well could be a bad ECM driver for an injector or an injector could just be bad still?

May have to take to the dealer and have it scanned to see why its trying to die and what the cause is of that.
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Old Aug 9, 2008 | 08:29 PM
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From: Bako CA
its probably a BAD tune.

i just recently had it tuned, and these problems started.............
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Old Aug 9, 2008 | 08:46 PM
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From: SK
Originally Posted by bridfi
its probably a BAD tune.

i just recently had it tuned, and these problems started.............
Wonder if the tune is trying to overdrive the injector pulse width causing it to overload?

You checked the duty cycle of the injectors while its having the troubles?
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Old Aug 9, 2008 | 08:59 PM
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From: Bako CA
Originally Posted by Red2.4SS
Wonder if the tune is trying to overdrive the injector pulse width causing it to overload?

You checked the duty cycle of the injectors while its having the troubles?
how do i do that?

whatever you just said, sounds like whats wrong.
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Old Aug 9, 2008 | 09:04 PM
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From: SK
Originally Posted by bridfi
how do i do that?

whatever you just said, sounds like whats wrong.
I can read mine with my dashhawk. Also in interceptor gauge would work. Otherwise you will have to return to your tuner and get it looked at.
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