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91 Tracker 1.6L starting problems
#2
welcome ! and thanks!
(gut feeling, is)
i think the cam belt slipped. (is 17mm front crank (pulley) at 94fb/lbs. not 10. not 20. or loose...

those readings , unplugged,
44 idle switch open or calibrated wrong or dash pot stuck open or someone, fiddle the idle stop screw, killing factory setting there
that strange readiing on your meter is called over-range, or more simply the circuit is open (infinity is shown that way)) same and connecting test leads.
and is normal, when parked, key on pocket, and the dashpot opens the throttle, (it has an internal spring) that pushes the throttle open , not running.
the first step in calibration is to hold back that device, Dashpot. or this test fails.


[Image: TPS-p91.JPG]

A>D is steady 3 to 5k ohms, eg: 4000 steady would be ok so would 5000. this is the fixed resistor carbon part.
then
reach down and hand retract the DP (dashpot) that funny vacuum deal on rear of TB(throttle body)
then check the switch. C > D>
500 ohms or less. if not set right it jumps to infinity ohm fast. this will fail, and cause 44s. every time. if not calibrated.

B>D is the pot side, called throttle angle. and varies about 1K to 5k ohms (or 1k to 3k ) as you vary throttle angles by hand,. this is normal.
it must not glitch or is bad pot wiper inside.

A>b Is the reverse of above, moving the throttle from idle to max.

so i bet CD fails. and false for many reasons.
but here they are.
1: the Throttle plate is 99.9% closed with dash pot 100% retracted by hand or using vacuum on the nipple (8inches) or tie wrapped backwards.
2: now the throttle is closed, as it must before the TPS is calibrated with the 3 feeler gauges. (or just one with great skill, luck)
3: feeler 0.016" is used at the throttle stop screw.
4: the with CD pins and meter OHMs 2k scale best , turn the TPS until the ohms JUST goes from Infinity to 500ohms or less.
done. no more 44s.


also many cars have been molested at the throttle stop screw, making all the above fail
http://www.fixkick.com/fresh-air/screwed-again.html

the valve is 99.9% closed. DP retracted, if not its wrong, and needs to be corrected
http://www.fixkick.com
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Messages In This Thread
91 Tracker 1.6L starting problems - by Drury - 11-27-2015, 10:51 AM
RE: 91 Tracker 1.6L starting problems - by fixkick - 11-27-2015, 11:32 PM
RE: 91 Tracker 1.6L starting problems - by Drury - 12-01-2015, 09:03 AM
RE: 91 Tracker 1.6L starting problems - by Drury - 12-02-2015, 02:22 AM
RE: 91 Tracker 1.6L starting problems - by Drury - 12-09-2015, 05:17 AM

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