What is going on with my TPS? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

RealQuick · 10-23-2017, 11:19 AM

Last time I drove my 2010 Camaro SS was in August (single turbo, stock bottom, NW102 TB).

I tried to drive it last weekend and I had some issues which I think was due to a low voltage from battery.

Put on a battery charger and fired it up this weekend. Idle sounded good and a quick WOT pull on low boost on the street felt great.

When looking at the TPS though... it jumps all over the place. One pic is at idle and one is during the run. TPS is purple line at the top.

The NW102 has ~500 miles on it, bought it brand new. Function great previously, not sure it is the problem.

RealQuick · 10-23-2017, 05:17 PM

So I hooked up my stock TB and got the same wavy TPS... so it isn't the TPS

unhooked completely the tps is wavy between 60-100%

maybe a short in the harness?

RealQuick · 10-25-2017, 07:58 AM

Checked all my wiring harness on the pass side, nothing looks burnt (I did a nice job of heat protection).

With engine off (key on) TPS with pedal to the floor only registers 91% and it is wavy still (does it with two different TB's). I ordered a new gas pedal/sensor assembly for $59 from local GM dealership. We'll see if it works.

stevieturbo · 10-26-2017, 04:31 PM

On a DBW car, the pedal will have two tracks and the throttle unit at the engine will have 2 tracks.

So what you're seeing on that log has less meaning as it will be some sort of amalgamation of the raw values.

Although strange it's doing that, and no fault codes being thrown, as these tend to be quite sensitive.

But you need to see the raw data from all 4 inputs to see if there are any anomalies.

RealQuick · 10-26-2017, 10:13 PM

Steve,

I Found the problem!

when I set my scanner up, I used the TPS (SAE) PID.

i switched to scanning just the TPS and all is smooth and pedal all the way down reads 99.6!

10-23-2017, 11:19 AM	#1
RealQuick Drives: 2010 Camaro 2SS M6 - Intake/Exhaust Join Date: Sep 2014 Location: Bridgewater Posts: 693	What is going on with my TPS? Last time I drove my 2010 Camaro SS was in August (single turbo, stock bottom, NW102 TB). I tried to drive it last weekend and I had some issues which I think was due to a low voltage from battery. Put on a battery charger and fired it up this weekend. Idle sounded good and a quick WOT pull on low boost on the street felt great. When looking at the TPS though... it jumps all over the place. One pic is at idle and one is during the run. TPS is purple line at the top. The NW102 has ~500 miles on it, bought it brand new. Function great previously, not sure it is the problem. Attached Images

10-23-2017, 05:17 PM	#2
RealQuick Drives: 2010 Camaro 2SS M6 - Intake/Exhaust Join Date: Sep 2014 Location: Bridgewater Posts: 693	So I hooked up my stock TB and got the same wavy TPS... so it isn't the TPS unhooked completely the tps is wavy between 60-100% maybe a short in the harness?

10-25-2017, 07:58 AM	#3
RealQuick Drives: 2010 Camaro 2SS M6 - Intake/Exhaust Join Date: Sep 2014 Location: Bridgewater Posts: 693	Checked all my wiring harness on the pass side, nothing looks burnt (I did a nice job of heat protection). With engine off (key on) TPS with pedal to the floor only registers 91% and it is wavy still (does it with two different TB's). I ordered a new gas pedal/sensor assembly for $59 from local GM dealership. We'll see if it works.

10-26-2017, 04:31 PM	#4
stevieturbo Drives: it changes Join Date: Nov 2010 Location: Norn Iron Posts: 1,126	On a DBW car, the pedal will have two tracks and the throttle unit at the engine will have 2 tracks. So what you're seeing on that log has less meaning as it will be some sort of amalgamation of the raw values. Although strange it's doing that, and no fault codes being thrown, as these tend to be quite sensitive. But you need to see the raw data from all 4 inputs to see if there are any anomalies.

10-26-2017, 10:13 PM	#5
RealQuick Drives: 2010 Camaro 2SS M6 - Intake/Exhaust Join Date: Sep 2014 Location: Bridgewater Posts: 693	Steve, I Found the problem! when I set my scanner up, I used the TPS (SAE) PID. i switched to scanning just the TPS and all is smooth and pedal all the way down reads 99.6!