Throttle position sensor problems

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Mar 20, 2020 | 03:13 PM

Aidan652

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Throttle position sensor problems

Hi all, I was wondering if you guys knew how I could fix my TPS problem. It’s throwing code 22 and I have replaced my sensor once. And the previous owner had replaced it before I got it as well. Which was roughly a year ago. The new sensor has been in for about 6-8 months. How can I find out the source of my problem? Wires and tps looks good visually. (Car is a 1987 Corvette). Thanks!

Mar 21, 2020 | 11:48 AM

Brandonvette

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Quote:

Originally Posted by Aidan652

did you set the voltage to 0.54 after install ?

Mar 21, 2020 | 12:12 PM

Aidan652

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Quote:

Originally Posted by Brandonvette

did you set the voltage to 0.54 after install ?

i had a friend help me do it and I don’t recall him doing that. How do I do that?

Mar 21, 2020 | 12:50 PM

jazfe

Pro

Joined: Feb 2009

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From: Vancouver Washington

Aidan652,
Lots of post here on how to set the TPS. Just do an advanced search for TPS setting.

Mar 21, 2020 | 01:37 PM

Brandonvette

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Quote:

Originally Posted by Aidan652

i had a friend help me do it and I don’t recall him doing that. How do I do that?

You need volt meter. Then put it in the back of the plug wile still plugged in . The top two wires . Turn key on but don't start and lose bolts and move till you get .54 volts it's really easy

Mar 21, 2020 | 02:43 PM

Aidan652

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Great. Thanks guys!

Mar 21, 2020 | 07:07 PM

Deepa

Burning Brakes

Joined: Mar 2010

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From: Providence RI

What brand tps? Ac delco is the only way to go

Mar 21, 2020 | 09:05 PM

Aidan652

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Quote:

Originally Posted by Deepa

What brand tps? Ac delco is the only way to go

Yep it’s AC Delco

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Mar 21, 2020 | 10:23 PM

GregMartin

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From: Brisbane Australia

C4 of Year Finalist (performance mods) 2019

After you set zero throttle check WOT It should be over 4V, I think mine is about 4.6 from memory. All the info is in the FSM.

Mar 21, 2020 | 11:25 PM

#10

xrav22

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From: Venice Cali.

I was sticking pins into the top 2 wires but since broke down and bought wire piercing tool. Makes it a bit easier to do.
.54-.56 probably ok for computer.
Good Luck

Mar 22, 2020 | 11:40 AM

#11

Aidan652

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Quote:

Originally Posted by xrav22

I was sticking pins into the top 2 wires but since broke down and bought wire piercing tool. Makes it a bit easier to do.
.54-.56 probably ok for computer.
Good Luck

should I be sticking it into the plug connector or the actual tps prongs?

Mar 22, 2020 | 11:46 AM

#12

Brandonvette

Instructor

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Quote:

Originally Posted by Aidan652

should I be sticking it into the plug connector or the actual tps prongs?

The back of the plug where the wires are goin in to the plug while it's still plugged in to the tps you tube a vid you'll see

Last edited by Brandonvette; Mar 22, 2020 at 11:50 AM.

Mar 22, 2020 | 11:58 AM

#13

xrav22

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From: Venice Cali.

Apr 20, 2020 | 12:25 PM

#14

jh-pop

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From: Liberec Česká republika

Hi, very useful article. Please can I still question, setting 0.54 is when the engine is hot or cold. Thanks for the message

Apr 20, 2020 | 01:26 PM

#15

xrav22

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From: Venice Cali.

https://www.digitalcorvettes.com/thr...your-c4.58873/

Apr 20, 2020 | 01:41 PM

#16

jh-pop

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From: Liberec Česká republika

Thank you for the information . I know the procedure and I applied it. However, the voltage varies slightly depending on the motor temperature. Is the sensor bad? Thanks

Apr 20, 2020 | 01:45 PM

#17

xrav22

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From: Venice Cali.

I always do it hot, just check it by turning it up and the volts will should go up. Mine was really bad as I was tightening it the volts were bouncing all over. With a new one tightening did not affect volts.

Apr 20, 2020 | 01:55 PM

#18

jh-pop

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From: Liberec Česká republika

Yes, I put it in cold condition over pins. Then the engine warmed up and the value changed to 0.64 . With a warm engine, the measurement was 0.54, followed by 0.58 after measurement.
I'll try a better setup

Last edited by jh-pop; Apr 20, 2020 at 01:56 PM.

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