Signs and Symptoms of TPS

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Sep 28, 2006 | 06:40 PM

rainfly

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Joined: May 2006

Posts: 12

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Signs and Symptoms of TPS

What are the signs and symptoms of a failed or failing TPS? Do they just die or can they have intermittent failure?

Sep 28, 2006 | 10:08 PM

jocool

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Joined: Jan 2004

Posts: 105

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From: St Louis, MO

Car: 89 Iroc & 88 Firecird & 86 Camaro

Engine: 350 TPI & 305 TBI & 305 Carb

Transmission: 700R4

They can fail intermittently. It should set off your ses light. I've seen them cause idle, and even transmission problems.

Sep 29, 2006 | 12:28 AM

rgarcia63

Supreme Member

Joined: Jan 2003

Posts: 2,133

Likes: 4

From: Houston, Texas

Car: 88' IROCZ

Engine: 388 TPI Motown 350 Race block

Transmission: 700R4

Axle/Gears: 2.77

Quote:

Originally Posted by jocool

They can fail intermittently. It should set off your ses light. I've seen them cause idle, and even transmission problems.

I just had that happen on my '99 S-10 4.3L Automatic. The CE Light was on and it was banging 1st gear then it got to the point it wouldn't go higher than 10mph at 3000rpm, idle was abnormally high, and wouldn't shift into any other gear.
I used AutoEnginuity's OBDII PC scan tool to scan the ECM.
It indicated a bad TPS, replaced it, cleared the code, and all was back to normal (idle didn't drop to the normal 500rpm until after the test drive.)