Ok, let me start off by saying i know my way around these car's fairly well but i have reached a dead end on this car.
I bought this car on here and its given me nothing but headaches, i bought a new crate motor for it finally got around to installing it all came out nice, the bummer is the car wont start, intermittent to no spark. Please dont post a link to vortex buick i have read the no start condition multiple times. This goes beyond the no start tree..
For the breakdown,
Has injector pulse but no spark she seems to get intermittent spark. I have swapped around ign modules to a verified module that works on my other car.
Has fuel pressure and inj pulse.
Verified cam sensor timing already with cam sensor tool, Even swapped out for a known good cam sensor from my other car.
Changed the crank sensor twice for shits and giggles even though i had injector pulse i still swapped it out.
I have verified voltage on ign module bulkhead to all pins/circuits.
Verified Signal and Constant on Cam sensor and Crank Sensor, I checked crank sensor clearance
I checked voltage at ECM plugs as well for hi low crank sign and cam signal.
Out of a miracle while just cranking it over, she decided to turn on for a quick second and then cut off.
What am i missing.. could the ignition switch cause this? My buddy keeps telling me to check ignition switch i just don't see how it could be ign switch?
It seems to intermittently have spark. I'm checking for spark with a flathead on the boot and close to ground i crank it over with no visible signs of spark.
Im at a dead end been 2 days diagnosing this for over 20 hrs. taken apart and put back together to many times..
Grounds are good. No blown fuses. Checked all fuses, All are good.
Swapped computers still same issue, Also just fyi i did have the new battery on a charger 13.99+ volts at all time. Im at a dead end. For some reason it seems when we wiggled the ignition switch and turned it over a little rough it seems it turned on for a sec..?! I dont see any shorts or splices anywhere other than the knock sensor on ECM??? I also swapped ESC modules for possible faulty esc module nada
Harness looks decent only thing is cut is the original 3 wire oil pressure switch which was swapped out for a electrical type oil pressure gauge. I tapped them up and are out of the way FP/Inj fuse is fine so i know there isnt a short with them...
What am i missing? What should i try?
I bought the car non driveable, car was parked i would say for easily 5 +yrs. I was told only a few months but when i got into it it was easy to see it was way longer than that. Replaced fuel lines gas tank fuel pump/hanger just the works you already know. Car was obviously parked for something and im going to fix it with your help..
I bought this car on here and its given me nothing but headaches, i bought a new crate motor for it finally got around to installing it all came out nice, the bummer is the car wont start, intermittent to no spark. Please dont post a link to vortex buick i have read the no start condition multiple times. This goes beyond the no start tree..
For the breakdown,
Has injector pulse but no spark she seems to get intermittent spark. I have swapped around ign modules to a verified module that works on my other car.
Has fuel pressure and inj pulse.
Verified cam sensor timing already with cam sensor tool, Even swapped out for a known good cam sensor from my other car.
Changed the crank sensor twice for shits and giggles even though i had injector pulse i still swapped it out.
I have verified voltage on ign module bulkhead to all pins/circuits.
Verified Signal and Constant on Cam sensor and Crank Sensor, I checked crank sensor clearance
I checked voltage at ECM plugs as well for hi low crank sign and cam signal.
Out of a miracle while just cranking it over, she decided to turn on for a quick second and then cut off.
What am i missing.. could the ignition switch cause this? My buddy keeps telling me to check ignition switch i just don't see how it could be ign switch?
It seems to intermittently have spark. I'm checking for spark with a flathead on the boot and close to ground i crank it over with no visible signs of spark.
Im at a dead end been 2 days diagnosing this for over 20 hrs. taken apart and put back together to many times..
Grounds are good. No blown fuses. Checked all fuses, All are good.
Swapped computers still same issue, Also just fyi i did have the new battery on a charger 13.99+ volts at all time. Im at a dead end. For some reason it seems when we wiggled the ignition switch and turned it over a little rough it seems it turned on for a sec..?! I dont see any shorts or splices anywhere other than the knock sensor on ECM??? I also swapped ESC modules for possible faulty esc module nada
Harness looks decent only thing is cut is the original 3 wire oil pressure switch which was swapped out for a electrical type oil pressure gauge. I tapped them up and are out of the way FP/Inj fuse is fine so i know there isnt a short with them...
What am i missing? What should i try?
I bought the car non driveable, car was parked i would say for easily 5 +yrs. I was told only a few months but when i got into it it was easy to see it was way longer than that. Replaced fuel lines gas tank fuel pump/hanger just the works you already know. Car was obviously parked for something and im going to fix it with your help..
Last edited: