-HELP-My turbo car is running on half the motor WTF?
#1
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From: Thomasboro, ILL
-HELP-My turbo car is running on half the motor WTF?
Well ive had the car started a handfull of times, and just pulled the plugs and found out that the drivers side bank is all messed up. The number 1,5 plugs new wial the 3,7 plugs are super black and rich. The pictures was taken exactly as the plugs sit in the motor. So far i have checked the following:
-All cylinders have spark
-Injectors are getting power
-I switched the injectors on the fuel rail and it made zero difference
-Changed plugs multiple times no difference-same results
-Car definitely is untuned, and loud yet i can still tell it is missing badly.
Im going to do a compression test first thing tomorrow morning, and hopefully its nothing mechanical!
SO ANY IDEAS ON WTF IS THE PROBLEM????
-All cylinders have spark
-Injectors are getting power
-I switched the injectors on the fuel rail and it made zero difference
-Changed plugs multiple times no difference-same results
-Car definitely is untuned, and loud yet i can still tell it is missing badly.
Im going to do a compression test first thing tomorrow morning, and hopefully its nothing mechanical!
SO ANY IDEAS ON WTF IS THE PROBLEM????
#7
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From: Detroit, MI - Camp Pendleton, CA
First check for spark on each cylinder on that bank. That will eliminate if you are getting spark at all on those cylinders. Look up the wiring diagram for the coils, you probably have the plugs mixed up. Just look at the diagram, match the color wires, then trace that coils spark plug wire to the cylinder. You can also swap the spark plug wires and that will give you a definite answer if they are crossed. Try swapping 3 and 7 around, that may cure it.
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#9
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From: Detroit, MI - Camp Pendleton, CA
https://ls1tech.com/forums/conversio...swap-faqs.html
Pick your year PCM and look for IC (Cyl#) Control. That will be the color the pcm fires the coil drivers on.
Pick your year PCM and look for IC (Cyl#) Control. That will be the color the pcm fires the coil drivers on.
#10
A, Black, Ground
B, Brown, Reference Low
C, Ignition Control, 1/Ppl 3/LtBlu 5/DkGrn 7/Red 2/RedWht 4/DkGrnWht 6/LtBluWht 8/PpplWht
D, Pink, Hot in run and start, Inj 2 15 amp
I had the same issue when I relocated my coils. It's user error.
B, Brown, Reference Low
C, Ignition Control, 1/Ppl 3/LtBlu 5/DkGrn 7/Red 2/RedWht 4/DkGrnWht 6/LtBluWht 8/PpplWht
D, Pink, Hot in run and start, Inj 2 15 amp
I had the same issue when I relocated my coils. It's user error.
#15
I had a similar problem many years ago. My car had been worked on quite a bit. I had 3 cylinders randomly misfiring. I checked things as stated above but no luck. I used an injector noid to verify they were getting voltage, so I was left scratching my head.
I decided to look further. I used a voltmeter to check continuity between each injector and the ECU. What I found was although the voltage was hitting, the 3 bad cylinders had faulty wiring. Turns out the copper strands inside the insulation were broken from being handled so much. I ordered 3 pigtails and replaced them. Goodbye misfire. So the way to check is to place one end of your voltmeter on the hot side of the injector plug, and place the other voltmeter lead on the appropriate pin on the ECU. While doing this, wiggle the injector harness around to see if you lose continuity. it isn't that hard to do and you can eliminate that as a potential problem.
I decided to look further. I used a voltmeter to check continuity between each injector and the ECU. What I found was although the voltage was hitting, the 3 bad cylinders had faulty wiring. Turns out the copper strands inside the insulation were broken from being handled so much. I ordered 3 pigtails and replaced them. Goodbye misfire. So the way to check is to place one end of your voltmeter on the hot side of the injector plug, and place the other voltmeter lead on the appropriate pin on the ECU. While doing this, wiggle the injector harness around to see if you lose continuity. it isn't that hard to do and you can eliminate that as a potential problem.
#17
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From: Thomasboro, ILL