HELP! car wont start need help troubleshooting
12-16-2013, 04:35 PM
#1
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HELP! car wont start need help troubleshooting I will apologize in advance if this is in the wrong section and of course for the long post. I am new to the forums and LS world so please bear with me. I have an 02 ws6, M6, just bolt ons, SLP lid, full exhaust, SLP MAF.
while pulling into a parking lot my car started running like crap until it died less then 30 seconds later. I checked rails and had fuel pressure. all my fuses were good. I tried to start it again, it would crank fire once and that's it. now it will only fire once every once in a while. I changed my crank sensor with no luck. I again checked for fuel pressure and NOTHING. i had changed my fuel filter not 2 weeks before. I checked my pump with plenty of pressure, then after my filter and plenty of pressure. it will once in a while be able to get pressure to my rails but more often i have nothing.
I am also having issues with what seems to be my VATS and im not sure if the issues are related. the majority of the time when i turn my key nothing will happen, as if the VATS is messed up. i do have the resister bypass and it has worked fine for over a year. using HP tuners i shut off my vast with no change. im at a loss right now. anything to point me in the right direction will be of great help.
while pulling into a parking lot my car started running like crap until it died less then 30 seconds later. I checked rails and had fuel pressure. all my fuses were good. I tried to start it again, it would crank fire once and that's it. now it will only fire once every once in a while. I changed my crank sensor with no luck. I again checked for fuel pressure and NOTHING. i had changed my fuel filter not 2 weeks before. I checked my pump with plenty of pressure, then after my filter and plenty of pressure. it will once in a while be able to get pressure to my rails but more often i have nothing.
I am also having issues with what seems to be my VATS and im not sure if the issues are related. the majority of the time when i turn my key nothing will happen, as if the VATS is messed up. i do have the resister bypass and it has worked fine for over a year. using HP tuners i shut off my vast with no change. im at a loss right now. anything to point me in the right direction will be of great help.
12-17-2013, 11:10 AM
#2
I will apologize in advance if this is in the wrong section and of course for the long post. I am new to the forums and LS world so please bear with me. I have an 02 ws6, M6, just bolt ons, SLP lid, full exhaust, SLP MAF.
while pulling into a parking lot my car started running like crap until it died less then 30 seconds later. I checked rails and had fuel pressure. all my fuses were good. I tried to start it again, it would crank fire once and that's it. now it will only fire once every once in a while. I changed my crank sensor with no luck. I again checked for fuel pressure and NOTHING. i had changed my fuel filter not 2 weeks before. I checked my pump with plenty of pressure, then after my filter and plenty of pressure. it will once in a while be able to get pressure to my rails but more often i have nothing.
I am also having issues with what seems to be my VATS and im not sure if the issues are related. the majority of the time when i turn my key nothing will happen, as if the VATS is messed up. i do have the resister bypass and it has worked fine for over a year. using HP tuners i shut off my vast with no change. im at a loss right now. anything to point me in the right direction will be of great help.
while pulling into a parking lot my car started running like crap until it died less then 30 seconds later. I checked rails and had fuel pressure. all my fuses were good. I tried to start it again, it would crank fire once and that's it. now it will only fire once every once in a while. I changed my crank sensor with no luck. I again checked for fuel pressure and NOTHING. i had changed my fuel filter not 2 weeks before. I checked my pump with plenty of pressure, then after my filter and plenty of pressure. it will once in a while be able to get pressure to my rails but more often i have nothing.
I am also having issues with what seems to be my VATS and im not sure if the issues are related. the majority of the time when i turn my key nothing will happen, as if the VATS is messed up. i do have the resister bypass and it has worked fine for over a year. using HP tuners i shut off my vast with no change. im at a loss right now. anything to point me in the right direction will be of great help.
That would be the nice, easy fix. If it isn't that, your fuel pump may just be on the fritz...sometimes it works, sometimes it doesn't.
12-18-2013, 06:09 PM
#5
Did you check for power and ground at the fuel pump connector when you were swapping them out? (I hope so....)
What about your fuel filter? Have you taken it off? It may be clogged. I've seen cheap filters actually come apart and plug the fuel line
The car is cranking right?
12-18-2013, 11:10 PM
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correct no pressure at the rail. I checked my filter this weekend and it was clear, allowing plenty of flow. im right back to square one. I can once in a great while get pressure to the rail but 9 times out of 10, nothing. I have power to my pump with a good connection but tonight's discovery is the pump is not kicking on every time even with the different pump...? im still new to this like i said, but if the pump is good, it has power, why wouldn't it pump? is there something computer related that would cause this?
12-18-2013, 11:24 PM
#7
correct no pressure at the rail. I checked my filter this weekend and it was clear, allowing plenty of flow. im right back to square one. I can once in a great while get pressure to the rail but 9 times out of 10, nothing. I have power to my pump with a good connection but tonight's discovery is the pump is not kicking on every time even with the different pump...? im still new to this like i said, but if the pump is good, it has power, why wouldn't it pump? is there something computer related that would cause this?
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12-19-2013, 01:02 PM
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Yes I used the trap door method. When I get pressure it will fire one time but will not run. And correct more often then not I'm not getting any pressure.