Lt1 help please ! no spark no fuel harness issue?
03-28-2013, 09:29 PM
#1
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Lt1 help please ! no spark no fuel harness issue? need some help with my Lt1 issue im having.
I swapped a 95 t56 and 95 harness into a 97 camaro car was auto so we used the harness out of the 95 donor vehicle with t56 manual trans . Plugged everything up only thing I had to change was ignition coil to 95 coil cause of plugs. The 95 harness has no crank sensor so we just left crank sensor plugged n we put key forward n the fuel pump does not kick on and we have no spark. I have no idea what to do to get this to work as we are still using 97 pcm and want to keep it for tuning capabilities as tuners will only tune 96 and up lt1s out here
any help is appreciated
I swapped a 95 t56 and 95 harness into a 97 camaro car was auto so we used the harness out of the 95 donor vehicle with t56 manual trans . Plugged everything up only thing I had to change was ignition coil to 95 coil cause of plugs. The 95 harness has no crank sensor so we just left crank sensor plugged n we put key forward n the fuel pump does not kick on and we have no spark. I have no idea what to do to get this to work as we are still using 97 pcm and want to keep it for tuning capabilities as tuners will only tune 96 and up lt1s out here
any help is appreciated
03-29-2013, 04:55 PM
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yep im boggled as why the fuel pump doesnt come on there is no spark and nothing but cranking as if the motor wants to turn but no spark or fuel going to it
03-29-2013, 08:28 PM
#6
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If you did no harness repinning, then you are likely missing one of wires that feed power to the PCM. The 95 harness uses a fuse under the hood for PCM power to C100, cavity D (orange wire) which feeds the PCM at C2, pins 15 and 31.
The 97 does not use this route to get that power. Instead it comes from C210, cavity C (fed by a fuse #3 in the dash and also an orange wire). So, you need to get that feed to your 95 harness at C100, cavity D.
So, when you look under your RH kick panel under the dash, C210, C coming from the LH side of the car (fuse side) should have an orange wire and the PCM harness (from the 95) side may have no wire at all. You'll need to run a wire from there to C100, D under the hood.
http://shbox.com/1/harness.htm
The 97 does not use this route to get that power. Instead it comes from C210, cavity C (fed by a fuse #3 in the dash and also an orange wire). So, you need to get that feed to your 95 harness at C100, cavity D.
So, when you look under your RH kick panel under the dash, C210, C coming from the LH side of the car (fuse side) should have an orange wire and the PCM harness (from the 95) side may have no wire at all. You'll need to run a wire from there to C100, D under the hood.
http://shbox.com/1/harness.htm
