tjbubb007

? im clueless ? it turns off when i touch the gas and turns on when i let off the gas

Roen

iTrader: (2)

narrow range tps sensor is bad.

buy a new one from mazda

fc pro am

iTrader: (8)

had the same problem on my 90 gxl, not sure if this is true but someone told me I had a bad TPS ( throttle position sensor).

tjbubb007

thanks

Roen

iTrader: (2)

360 from mazdatrix, that's probably your best bet unless you can some other discount somewhere else.

ivegonemad

wow i have the same problem....it also occurs to me that the tps when it goes bad do you guys experience a low 500rpm idle??

BlueTII

The tps could very easily just need to be adjusted.

TPS tester http://www.banzai-racing.com/products_tps_tester.htm

how to http://www.banzai-racing.com/TPS_adjustment.htm

Roen

iTrader: (2)

If an S5 needs adjustment, it needs replacement. It won't be able to produce smooth voltage across the range. That's especially true with the full-range sensor, but also for the narrow range.

schmol

I have the same problem on my '89 vert, I just leave it that way since it really doesn't affect the performance of the car unless I let off the gas. It probably needs a good adjustment to get it to work properly.

If you are looking to replace it, here is a website that blows Mazdatrix price out of the water for a new TPS: http://catalog.drivewire.com/drivewi...on=919777&fm=1

Roen

iTrader: (2)

ooh....nice find.

I prefer the resistance method of adjustment, but even that only gave me perfect results for 1 month before the tps went bad further.

You don't need the tps tester to do the two lights method posted above. Two digital multimeters will do the trick. On = 12V off = 0V. If you're good enough, and can discern how the voltage is affected by the rotation of the screw, then only one multimeter is required.

I see the two lights method as a rough adjustment and the resistance method as a fine adjustment. However, I've adjusted too many S5 TPS's to know that adjusting them is pretty futile.

schmol

The bad thing is, that website had them on sale about 3 months ago for $136 and change.

tjbubb007

would the tps cause the car to "backfire" a lot cause mine does, when i let of the gas?

schmol

yes it would...the injectors are staying open and dumping fuel into the exhaust system.

celbii

iTrader: (2)

Obviously it wants you to get on the gas and go zoom zoom