car went crazy need help
car went crazy need help So I was driving around tonight and got on the car a little just because I haven't in a while well that turned out to be a big mistake. The car went kinda bezerk, the gauges all floated around and all my lights came on and the car died shortly after, I managed to coast it into an empty parking lot and began to look all my electrical connections over. I hadn't discovered anything unusual and when I tried to start the car it turned over but did not start. I noticed that it didn't sound like the fuel pump was running and after several attempts the car finally started. I drove the mile or so home and half way the car sputtered very badly the gauges went crazy and it almost died again. I have an upgraded racetronix fuel pump kit that only has about 4K miles on it and has never given me trouble before, any idea what is going on here?
that defiantly helps. I'm thinking its electrical for sure, but its weird that it only happens at WOT and never just driving around. Anyhow I checked my battery after I left the lights on for a while and it still read 12.69V so I think it may be ok. Any other suggestions
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Joined: Nov 2003
Posts: 6,216
Likes: 236
From: Wichita KS / Rancho San Diego
You have to load test the battery. It can have an internal short and still give a normal reading on a voltmeter when it's not under load. Have somebody crank it while you have the voltmeter on it or take the battery to a shop.
Went over a few things today quickly, the battery is safe and secured tightly. Also checked the ground on the strut tower and it was a lil rusty but once I removed the nut it was clean and looked like it was getting a good connection so I scuffed it up an bit and reconnected it. Both battery posts and supplied power connectors are on tightly as well so I guess I will have to get under the car and inspect that ground going near the motor mount and see if that is ok, if so then I'll see if I can have the battery and alternator checked at my work (dealership) on tuesday.
Checked the PCM connections today and found corrosion on four pins on the set closest to the firewall. Clean them all out and took the car for a little spin, at WOT the car did as it should and ran great spinning the tires very bad but it put a smile on my face. Only problem is that my TCS OFF light stays on and the switch doesn't do anything, will this go away after a few startups or is there something else?
UPDATE!
Went to drive the car to work today and it dies about half a mile away from my house I had to push it off the road into a parking lot only to discover that it wouldn't start and once again no fuel pump kicking on. Looks like the corroded wires weren't the main problem after all. Left the car til this afternoon thinking maybe the pump is getting hot and shutting off and then cooling off to start again. Checked it this afternoon and its still not working so I'm gonna go over the wiring and then possibly replace the pump, IT NEVER ENDS!
Went to drive the car to work today and it dies about half a mile away from my house I had to push it off the road into a parking lot only to discover that it wouldn't start and once again no fuel pump kicking on. Looks like the corroded wires weren't the main problem after all. Left the car til this afternoon thinking maybe the pump is getting hot and shutting off and then cooling off to start again. Checked it this afternoon and its still not working so I'm gonna go over the wiring and then possibly replace the pump, IT NEVER ENDS!
TECH Enthusiast
Joined: May 2007
Posts: 538
Likes: 0
Did you replace the pump bucket/sending unit assembly and the sending unit pigtial when you did the pump ?? gm cars are notorious for the pins burning outs of the Pigtials to the sending unit and creating intermitent problems.
Are your gauges still flipping out ?
Are your gauges still flipping out ?
Originally Posted by Detroitmuscle
UPDATE!
Went to drive the car to work today and it dies about half a mile away from my house I had to push it off the road into a parking lot only to discover that it wouldn't start and once again no fuel pump kicking on. Looks like the corroded wires weren't the main problem after all. Left the car til this afternoon thinking maybe the pump is getting hot and shutting off and then cooling off to start again. Checked it this afternoon and its still not working so I'm gonna go over the wiring and then possibly replace the pump, IT NEVER ENDS!
Went to drive the car to work today and it dies about half a mile away from my house I had to push it off the road into a parking lot only to discover that it wouldn't start and once again no fuel pump kicking on. Looks like the corroded wires weren't the main problem after all. Left the car til this afternoon thinking maybe the pump is getting hot and shutting off and then cooling off to start again. Checked it this afternoon and its still not working so I'm gonna go over the wiring and then possibly replace the pump, IT NEVER ENDS!
I replaced the entire stock fuel pump and the wiring harness with the Racetronix unit.
http://www.racetronix.com/RX-F99-FPKG-2.html
I've checked over the accessible electrical in the car with no luck so it looks like I'll be removing the pump tomorrow. It seems lots of people are having trouble with the supplied hose clamp not begin enough and they are using two instead and having good luck with that. Maybe the hose has come loose.
As for the gauges they seem to be fine now.
http://www.racetronix.com/RX-F99-FPKG-2.html
I've checked over the accessible electrical in the car with no luck so it looks like I'll be removing the pump tomorrow. It seems lots of people are having trouble with the supplied hose clamp not begin enough and they are using two instead and having good luck with that. Maybe the hose has come loose.
As for the gauges they seem to be fine now.
TECH Enthusiast
Joined: May 2007
Posts: 538
Likes: 0
Ok so one problem fixed another problem surfaces. I am talking about the portion of the harness that plugs into the sending unit at the top of the tank. The 4 pin peice. they sell a repair pigtial at most reputable parts places. Works great.
Originally Posted by Detroitmuscle
I replaced the entire stock fuel pump and the wiring harness with the Racetronix unit.
http://www.racetronix.com/RX-F99-FPKG-2.html
I've checked over the accessible electrical in the car with no luck so it looks like I'll be removing the pump tomorrow. It seems lots of people are having trouble with the supplied hose clamp not begin enough and they are using two instead and having good luck with that. Maybe the hose has come loose.
As for the gauges they seem to be fine now.
http://www.racetronix.com/RX-F99-FPKG-2.html
I've checked over the accessible electrical in the car with no luck so it looks like I'll be removing the pump tomorrow. It seems lots of people are having trouble with the supplied hose clamp not begin enough and they are using two instead and having good luck with that. Maybe the hose has come loose.
As for the gauges they seem to be fine now.