zoltan944

WMS says to test wire 3 & 5 for idle, it should be 0ohm closed and inf if opened. and lead 12&5 should be inf if closed and 0ohm if throttle is approx past 3/4.
at closed throttle my readings are 0ohm on 3/5 and 12/5. when i put the throttle opened all the way, i get 10kohm(i think) on 3/5 and 12/5.
on the midway connector from the TPS to the connector at the front of the engine my readings were top/middle - sometimes inf, most of the time -40k ohms shut, then to 0 when throttle opened. middle to bottom readings were 0 no matter what.
is this just a simple tps swap?
this does however conclude my wideband readings tho. If the LH thinks im cruising at 700rpm and never hits WOT

zoltan944

well, my meter seems to be giving out some whacky readings right now... 12v is 2v now?
Anyway, im gonna go buy another ohm meter and try.
Also do i read that right that the part # is 944.606.113.01 which is also a 924S 88? If so i can swap one from my 924 to test before i buy a new one.

zoltan944

okay, got a new ohm meter
at the TPS, the idle works but the WOT does not
at the LH on the black connector, idle shows 0ohm in both idle and WOT
at WOT idle and WOT shows 1230ohms
any help here?

zoltan944

can someone verify the pins i should be testing? The WMS doesn't seem real clear on the pins for the 85, now i see 4/12 and 12/17 but i don't even have a pin 4?

Bill Ball

You test on the EZF and LH harness plugs. The LH and EZF on 85 both have 25 pin plugs.

Pull off both EZF and LH control unit plugs.

To test the idle postion, connect ohmmeter on terminal 4 of disconnected EZF-control unit plug and ground.

Throttle closed = 0 ohm (max. 10 Ohm )
Throttle opened = inf. ohm
Idle contact must open immediately (< 1 degree throttle gap).

To test the WOT position, connect ohmmeter on terminal 17 of disconnected EZF-control unit plug and ground

Throttle closed = inf. ohms
Throttle switch after about 2/3rds of throttle travel = 0 ohms (max. 10 ohms )

Now, test the signal going to the LH plug

To test the idle postion, connect ohmmeter on terminal 3 of disconnected LH-control unit plug and ground.

Throttle closed = 0 ohm (max. 10 Ohm )
Throttle opened = inf. ohm
Idle contact must open immediately (< 1 degree throttle gap).

To test the WOT position, connect ohmmeter on terminal 12 of disconnected LH-control unit plug and ground

Throttle closed = inf. ohms
Throttle switch after about 2/3rds of throttle travel = 0 ohms (max. 10 ohms )

Bill Ball

If you get a bad reading based on the above. Test the switch itself.

zoltan944

man, thanks a bunch Bill. That tested exactly how it was supposed to and i got the same readings. I am not getting a WOT signal! I will try a quick adjustment per the WMS, but ordered a new TPS anyway.

Bill Ball

AFAIK, there is no adjustment for the WOT position, just idle position. It either works or it doesn't.

zoltan944

well, what you can do is move it counterclockwise. assuming of course it does work, but needs some adjustment.
After pulling the TB and measuring on the switch, i couldn't get a WOT reading. After adjusting the TPS some CC i was able to Bring my WOT around the 2/3 mark. IMO, i am adjusted to far CC and i hope this will 'band aid' it till my new switch comes!

Bill Ball

That's odd. I have seen the 85-6 switch and it is just like my 89 although reversed. You have fine adjustment for idle, as it has to be REALLY close to the closed throttle position. WOT is anywhere after 2/3rds throttle, so if it doesn't go WOT at full throttle, I would think no amount of adjustment is going to make it work without throwing the idle positon way off. So, if you moved WOT, be sure idle switch is still OK tripping at just BARELY off closed throttle. That being said, I have seen a throttle switch which would not go WOT when snugged all the way on tight, but would if one screw was left slightly loose.

zoltan944

LOL. Well, it kinda worked..... idle is still fine, but WOT is kinda hit and miss. so i wont be hitting WOT as i don't want to randomly get my correct map going on my car!
Bill, thanks for living in CA so you were up late to help me figure this out last night!

DR

In a pinch you can always open the TPS switch and clean the contacts on the WOT portion of the switch. They are very simple inside and easy to refurb. You can also reshape the plastic WOT cam inside to have WOT action sooner or later if desired.

Bill Ball

Thanks for that info, DR. I like taking things apart.

zoltan944

DANG IT! I wish i knew this yesterday. I had the infamous dirty valley and there was alot of old oil and crap on my throttle body, that i cleaned off. When i removed the TPS there was some oil that got in there. I sprayed some Electrode cleaner in there and sprayed air to clean it... Im almost positive it got messed up by oil, but last night i was unsure if taking it apart was going to mess something up or not.

DR

Bill,

>Thanks for that info, DR.

You are very welcome.

>I like taking things apart.[/QUOTE]

WOW, now that is a NEW FLASH.... NOT !! :-)