drdave88

I had the same P1518 on my old 2002 3800 Firebird. I ended up replacing the throttle pedal assembly. Replacing the throttle body didn't do it for me. I got lucky though, there's a guy near me who parts out 4th gens so I was able to pick up used parts for pretty cheap.

blackbyrd

iTrader: (14)

@nimrod.sixty9 I have a few things left but not much, let me check the tub tonight and see what I have left. Im 90% sure I still have the pedal assembly left

nimrod.sixty9

iTrader: (5)

Ah, yes I think I misunderstood. As I mentioned before I looked at live reading of TPS. Thought your were implying that I didnt have the right thing.
But to your point, I did exactly that. Stood infront of car while wife pressed pedal. The blade opened but no change in TPS reading.

So deff the TAC module only. Was there anything else you did?

Much appreciated. Ive been looking online and doesnt seem to be any sources for it.

drdave88

I swapped the throttle body assembly first, when the issue came back, I reinstalled the old one and then replaced the TAC module. That resolved my issue.

wssix99

iTrader: (5)

OK. That's pretty conclusive that the sensor you are reading isn't playing nicely. I would take the part off and bench test it next to make sure. (Sometimes these don't report so nicely through the serial connections in the scanners, but doing a resistance check on the bench will confirm 100%.)

nimrod.sixty9

iTrader: (5)

Hey guy, did you have a chance to look?

01CamaroSSTx

iTrader: (3)

I have a V6 car here that's being converted over to DBW and a V8. What is that you need?

nimrod.sixty9

iTrader: (5)

The TAC module connected to the pedal. I believe it's all one piece.

01CamaroSSTx

iTrader: (3)

Okay if its the TPS/TB you needed then your SOL because the one I have is bad. Can you send me a picture of what it is your after and I'll pull it off the car and ship it on your dollar.

nimrod.sixty9

iTrader: (5)

No sir, it is the pedal assembly, only because the module is attached to it.

https://i.ibb.co/VBpPf2P/s-l1600.jpg

01CamaroSSTx

iTrader: (3)

I'll try to get that removed sometime this week.

blackbyrd

iTrader: (14)

yeah forgot to write back yes I do have the assembly in my garage

nimrod.sixty9

iTrader: (5)

Much appreciated! How much to 34974?

What do you want for yours? How soon could you ship?

nimrod.sixty9

iTrader: (5)

Installed TAC and same result.
Worked for a few when I deleted the code. Throttle position responded in the app perfectly.
Started charging the AC, because Im on a roll, and then it started chugging.
Sure enough the code is back and throttle was no longer reading.
Deleted code again and was well for a few minutes.

IDK whats next at this point.

wssix99

iTrader: (5)

Did you bench test the sensor and check the resistance before and after the install? It would help to know if the sensor was good before, if its good now, etc. That will help you trace down a problem with a wiring short vs. the actual sensor.

01CamaroSSTx

iTrader: (3)

So you were able to get your hands on one and it still didn't resolve your issue?

nimrod.sixty9

iTrader: (5)

Nope. No idea how.
I find it strange that it would work great, but then the PCM decides it doesnt and puts it in limp mode.

Correct

wssix99

iTrader: (5)

There should just be two wires that provide the sensor output and the sensor should be a varistor. You can use an ohmmeter and see the resistance change as the sensor TPS signal changes. If the resistance doesn't change or if there is a short and no resistance - the sensor is bad.

nimrod.sixty9

iTrader: (5)

Ill have to scour the schematics. FSM doesnt correlate the TPS and code 1518 at all.

https://i.ibb.co/0Q2ZLHR/94674135-52...46616064-n.jpg

https://i.ibb.co/bR4CDSG/94487009-25...30473984-n.jpg

Some reason I cannot post pics :/

nimrod.sixty9

iTrader: (5)

Possible the one I bought is bad. You pulled yours yet?