Disconnected TPS, no change =bad TPS?

[matz445]

OK tonight I cleaned the AIV and EGR valve. First I loosened the tps screws and tried moving up and down a little, made hardly any diffrence. Then I disconnecred it and it runs the same. Finally I removed it and it idled just as it should. So I would think this would tell me I have a bad TPS right? Also the turbo seems to have a little scream, is this a normal sound in these cars or is my turbo getting weak. Boosts full no prob, just has this hesitation at low rpm's, it's very annoying. I just got this car on trade so I know nothing about them. Thanks in advance. Oh yeah I also just put in new plugs and wires. and can't find any vac leaks.

[Pat_in_L.A.]

Re: Disconnected TPS, no change =bad TPS?

Originally posted by matz445
OK tonight I cleaned the AIV and EGR valve. First I loosened the tps screws and tried moving up and down a little, made hardly any diffrence. Then I disconnecred it and it runs the same. Finally I removed it and it idled just as it should. So I would think this would tell me I have a bad TPS right?

It's not likely that you'd be able to adjust the TPS without a multimeter. The complete procedure is outlined with detail in the FAQ section.

[Eyelawdoc]

Setting TPS

Look here for the details on how to set the TPS:

http://www.svoca.com/forum/showthread.php?s=&threadid=11

[matz445]

Do I need to buy a digital and analog meter, or is a multimeter as it sounds have both? Sorry I sound like such a dumbass but I'm just starting to work on my own cars.

[Eyelawdoc]

Diagnostic Tools

It is a good idea to have both an analog and digital multimeter (otherwise known as a VOM) You can find them at Radio Shack or Home Depot or at your local tool or auto supply stores.

Another good tool to own is a Ford code scanner. They are about $20.00 at your local auto parts store. They come with a book of instructions on how to test, read and interpret the troubleshooting codes from your SVO's EEC IV computer. You can aso read these with an analog multimeter, but it is MUCH EASIER with the specialized scanner.

A good reference book to have is Ford Fuel Injection & Electronic Engine Control, 1980-1987 by Charles O. Probst, SAE. It explains how all of the sensors, computer and fuel injection stuff work on your SVO. It is an outstanding reference book if you are working on these cars. I got my copy from Amazon.com