losing injector pulse
05-12-2014, 09:56 AM
#1
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losing injector pulse Hi i dont know if this is the right place to ask this but anyways.
Im working on a 67 corvette with a ls2 swap using a painless harness. the car ran fine for about a month prior to the issue and then sat for about 3 weeks. The battery was dead when it went to get fired up next so it got replaced.
The issue that is happening is the car well start up after sitting for about a day and run fine for about 5 min then shut off and if i try to start it again it just cranks over . the car well start and run off brake clean being sprayed in the intake. i have checked all powers and grounds going to the pcm, checked all the injector wires for continuity from pcm to injectors , i have power to all the injector wires, and when i try to start the vehicle it pulses 3 times before it kills the injector signal, the vats is disabled and have also changed the pcm and still has the same issue. it dont throw any codes when this happens . it only threw a code once between both pcms which was a po200 and has not came back since cleared. also all the injectors ohm out @ 12.5-13.2
any suggestions are appreciated
Im working on a 67 corvette with a ls2 swap using a painless harness. the car ran fine for about a month prior to the issue and then sat for about 3 weeks. The battery was dead when it went to get fired up next so it got replaced.
The issue that is happening is the car well start up after sitting for about a day and run fine for about 5 min then shut off and if i try to start it again it just cranks over . the car well start and run off brake clean being sprayed in the intake. i have checked all powers and grounds going to the pcm, checked all the injector wires for continuity from pcm to injectors , i have power to all the injector wires, and when i try to start the vehicle it pulses 3 times before it kills the injector signal, the vats is disabled and have also changed the pcm and still has the same issue. it dont throw any codes when this happens . it only threw a code once between both pcms which was a po200 and has not came back since cleared. also all the injectors ohm out @ 12.5-13.2
any suggestions are appreciated
05-15-2014, 10:11 AM
#4
Hi i dont know if this is the right place to ask this but anyways.
Im working on a 67 corvette with a ls2 swap using a painless harness. the car ran fine for about a month prior to the issue and then sat for about 3 weeks. The battery was dead when it went to get fired up next so it got replaced.
The issue that is happening is the car well start up after sitting for about a day and run fine for about 5 min then shut off and if i try to start it again it just cranks over . the car well start and run off brake clean being sprayed in the intake. i have checked all powers and grounds going to the pcm, checked all the injector wires for continuity from pcm to injectors , i have power to all the injector wires, and when i try to start the vehicle it pulses 3 times before it kills the injector signal, the vats is disabled and have also changed the pcm and still has the same issue. it dont throw any codes when this happens . it only threw a code once between both pcms which was a po200 and has not came back since cleared. also all the injectors ohm out @ 12.5-13.2
any suggestions are appreciated
Im working on a 67 corvette with a ls2 swap using a painless harness. the car ran fine for about a month prior to the issue and then sat for about 3 weeks. The battery was dead when it went to get fired up next so it got replaced.
The issue that is happening is the car well start up after sitting for about a day and run fine for about 5 min then shut off and if i try to start it again it just cranks over . the car well start and run off brake clean being sprayed in the intake. i have checked all powers and grounds going to the pcm, checked all the injector wires for continuity from pcm to injectors , i have power to all the injector wires, and when i try to start the vehicle it pulses 3 times before it kills the injector signal, the vats is disabled and have also changed the pcm and still has the same issue. it dont throw any codes when this happens . it only threw a code once between both pcms which was a po200 and has not came back since cleared. also all the injectors ohm out @ 12.5-13.2
any suggestions are appreciated
05-15-2014, 10:30 AM
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Vats is disabled in both pcm's that I have just checked again with hp tuners.
Replaced crank sensor also still same issue.
after some more testing today i also found that if i disconnect the battery and swap the pcm it well fire up and run great no codes and no issues until i turn it off and try to restart the vehicle then it goes back to only pulsing the injectors 3 times then nothing . If i disconnect the battery and swap pcms again it well fire up and run until i shut it down again . I tried this 4 times just to see what would happen and have the same results every time.
Im running out of ideas as to what is going on ?
Replaced crank sensor also still same issue.
after some more testing today i also found that if i disconnect the battery and swap the pcm it well fire up and run great no codes and no issues until i turn it off and try to restart the vehicle then it goes back to only pulsing the injectors 3 times then nothing . If i disconnect the battery and swap pcms again it well fire up and run until i shut it down again . I tried this 4 times just to see what would happen and have the same results every time.
Im running out of ideas as to what is going on ?
01-01-2022, 03:42 PM
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01-01-2022, 03:54 PM
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