Tps Question

[morganb 0]

Hi guys, i know the subject of the TPS has been discussed lots on here but i have quick question - I drive a phase two 1600 gti.

Is there a quick way to diagnose if a TPS is faulty?.

 

I only ask as the bottom 7mm nut holding the unit on is rounded so im struggling to get the sensor off to test it

I removed the connector plug from the sensor and it made no difference to idle speed or how the car runs.

 

The car is kangarooing quite a bit at low speeds and while it can be left to idle steadily at 1000rpm a small blip of the throttle can cause the idle speed to fluctuate and then not settle back at 1000rpm.

 

Thanks in advance

[welshpug 1,657]

its very simple, its a 2 position switch, so one terminal is a common, and at off throttle the switch will have continuity through one terminal, at WOT it should through the other one.

[Anthony 1,003]

... and unlike most modern cars, it only actually does two things:

 

1) Enables the fuel cut-off on overrun

2) Enables full throttle fuel enrichment

 

It isn't actually doing anything as such in regular driving with the throttle part-open. You can even leave it unplugged temporarily to test that any issues are unrelated, although full throttle can feel distinctly flat without the enrichment.

[morganb 0]

thanks guys, its a pretty simple device really then. I'll check the terminals tomorrow. Finally its back on the road all legal after spending the last 3+ years on a SORN and looking a real sorry state dumped at the end of my parents garden so im a happy guy!