I randomly lose TCS after working with fuel system.
Thread Starter
TECH Fanatic
Joined: Dec 2001
Posts: 1,220
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From: Germantown, MD
I randomly lose TCS after working with fuel system. Hey guys I've been racking my brain trying to figure this one out. Since the day me and a some friends worked on my fuel my Traction Control has been acting wierd. About 50% of the time(almost 100% when the car is cold) when I start the car my TCS is disabled. If after a startup where the TCS is off, if I turn the car off and turn it back on TCS usually will come back online.
I have some WOT fuel supply problems and we were just trouble shooting the issue. We pulled evap lines, pulled fuses, swapped FPRs, pulled the intank pump and played with that. Standard testing stuff.
So OK, I don't remember ever messing with the TCS system. When I came out of the bowling ally that night after the fuel work I had TCS off and an SES light. The SES light was the throttle position sensor. I open the hood and I forgot to replace the evap line to the evap canister. So I put the evap line back on, removed the TPS cable, replaced it and reset the code. No problems with TPS since. Maybe a total coincidense.
The guys that were helpin me out were looking at my rear at a time, is it posible one of them pulled the TCS plug? Could it have been a fuse in the engine bay fuse box? Maybe it's loose?
Any other ideas? I pulled all the relevant sensors in the areas of the engine bay we were working and replaced them all, but that hasn't helped. I'm looking for any ideas guys.
Thanks,
Mike
I have some WOT fuel supply problems and we were just trouble shooting the issue. We pulled evap lines, pulled fuses, swapped FPRs, pulled the intank pump and played with that. Standard testing stuff.
So OK, I don't remember ever messing with the TCS system. When I came out of the bowling ally that night after the fuel work I had TCS off and an SES light. The SES light was the throttle position sensor. I open the hood and I forgot to replace the evap line to the evap canister. So I put the evap line back on, removed the TPS cable, replaced it and reset the code. No problems with TPS since. Maybe a total coincidense.
The guys that were helpin me out were looking at my rear at a time, is it posible one of them pulled the TCS plug? Could it have been a fuse in the engine bay fuse box? Maybe it's loose?
Any other ideas? I pulled all the relevant sensors in the areas of the engine bay we were working and replaced them all, but that hasn't helped. I'm looking for any ideas guys.
Thanks,
Mike
Re: I randomly lose TCS after working with fuel system. If you pulled the tank for the pump swap or messed with the bulkhead plug at the back of the car start there. The rear speed sensors plug in there. Even if the connector looks like it's plugged, unplug and check the pins. I had a pin back out on mine when the car was stock and it disabled the ABS. Dyno guy pulled the plug on the dyno to "not freak out the ABS" 
That's my guess anyway
You didn't mess with the ABS unit itself did you? Or the front speed sensor plugs?
That's my guess anyway
You didn't mess with the ABS unit itself did you? Or the front speed sensor plugs?
Thread Starter
TECH Fanatic
Joined: Dec 2001
Posts: 1,220
Likes: 0
From: Germantown, MD
Re: I randomly lose TCS after working with fuel system. Well i wasn't watching the other two guys at all times so I can't say for sure what they messed with. But as far as I know, no we didn't mess with the speed sensors or ABS. I know they wouldn't do anything intentionally.
We were testing voltage on the pump. That would include sticking a paper clip in the connector to get a reading. Yeah yeah I know, real high tech stuff. :p
I'll check back there and see if any pins are out of whack. Thanks for the direction.
Mike
We were testing voltage on the pump. That would include sticking a paper clip in the connector to get a reading. Yeah yeah I know, real high tech stuff. :p
I'll check back there and see if any pins are out of whack. Thanks for the direction.
Mike
