TPS voltage issues

[captdistraction]

I've searched, so I guess this isn't terribly common:

My car just had an issue where it went into limp mode because it saw 0 on the TPS voltage, voltage had dropped on a wot run and zeroed out. After restarting the car, everything was fine, drove home without issue.

I've cleaned and checked the plug, the operation of the TPS, and am adding a second ground strap (since the TB uses a chassis ground) to see if that helps. Otherwise monday the accufab TB gets shipped to accufab for repair.

Anyone run into anything like this? Just my luck, lol.

 

[TurboFocus]

A friend with a turbo 5.0 had his go out also, same scenario shut it off then on and it would reset, the dealer replaced it under warranty

 

[captdistraction]

Just tried it again, and same result. As it hits 6k the voltage goes away.

Ill have to find a stock throttle body to use while this one gets fixed

 

[captdistraction]

from the two runs, I now have no idea. Accufab doesn't believe its the throttlebody, I've added an additional engine ground, and now at a loss. I'll need to find a throttlebody to temporarily use and troubleshoot against.

 

[captdistraction]

Did more poking around. Man I pray this is it:

 

[captdistraction]

I think it's fixed. This had even unhooked since day one with the motor, not sure why it didn't stop the first time I ran it all the way up, but tried not long ago and it revved successfully. Definitely makes sense for the types of issues we were seeing

 

[claudermilk]

Good to hear. It's little crap like that which kills you.

 

[Flapjack]

You cannot imagine how much that seems like something that would happen on my car.

Glad you found it.

 

[captdistraction]

BLEEPING BLEEP.

It *still* does it. I've fixed that ground issue, and installed new o2 sensors, cleaned every bit of the car and checked all connections, reflashed the ECU, reset the computer.

The weird thing is, the only way to duplicate this is:
1) have livelink running
2) start the run at 2000rpm in 3rd.

I need to do more testing, but if I start higher than 2k, I seem to have no problem finding my way above 6k (all the way up to 8).

Anyone have any thoughts? Or a spare coyote throttle body I could test with for a week?

 

[CoreGT]

If you were close I'd let you borrow mine. Right now it'd would take a week to get there by UPS due to our distance. Good luck man

 

[BadHabit2Break]

BLEEPING BLEEP.

It *still* does it. I've fixed that ground issue, and installed new o2 sensors, cleaned every bit of the car and checked all connections, reflashed the ECU, reset the computer.

The weird thing is, the only way to duplicate this is:
1) have livelink running
2) start the run at 2000rpm in 3rd.

I need to do more testing, but if I start higher than 2k, I seem to have no problem finding my way above 6k (all the way up to 8).

Anyone have any thoughts? Or a spare coyote throttle body I could test with for a week?

So it only does it with Livelink running?

 

[ArizonaGT]

wtf

 

[Napoleon85]

BLEEPING BLEEP.

It *still* does it. I've fixed that ground issue, and installed new o2 sensors, cleaned every bit of the car and checked all connections, reflashed the ECU, reset the computer.

The weird thing is, the only way to duplicate this is:
1) have livelink running
2) start the run at 2000rpm in 3rd.

I need to do more testing, but if I start higher than 2k, I seem to have no problem finding my way above 6k (all the way up to 8).

Anyone have any thoughts? Or a spare coyote throttle body I could test with for a week?

That's incredibly bizarre! If you start your run at 2k in 3rd without livelink running it all works fine?

 

[captdistraction]

I'm testing that tonight, and on a different section of road (the same result always obtained on one particular onramp, I know that's silly but might as well check it off)

 

[Napoleon85]

I'm testing that tonight, and on a different section of road (the same result always obtained on one particular onramp, I know that's silly but might as well check it off)

Crazy thought ... was it rough/bumpy?

 

[captdistraction]

Crazy thought ... was it rough/bumpy?

possibly with slight elevation change, but at the same time, the voltage always drops to zero around 5600+rpm in that setup.

 

[BadHabit2Break]

Did you get it fixed?

 

[captdistraction]

Haven't tested yet. Feeling pretty under the weather myself. (I did check to make sure livelink wasn't plugged into me lol)

 

[captdistraction]

I bought a new stocker. Should be here next week. However i did go back to the spot and do a run in third from 2k-8k. No livelink or anything plugged into the odb2 port. The run went fine, no issue, no cutout. I didn't duplicate it but this is at least something (it's not easy to find somewhere you can do repeated blasts up to 100mph)

 

[BadHabit2Break]

I bought a new stocker. Should be here next week. However i did go back to the spot and do a run in third from 2k-8k. No livelink or anything plugged into the odb2 port. The run went fine, no issue, no cutout. I didn't duplicate it but this is at least something (it's not easy to find somewhere you can do repeated blasts up to 100mph)

That is the truth!