A/T 4speed fails, car wont move until hot.

[zukitrek]

the meter again is bipolar, the DMM can read -5v or +5v.
unlike any analog meter, unipolar.
yes that is what measure across these 2 pins means,
connect the meter leads to the 2 pins, (any order)
red to one , black test lead to the other, it hard to do, backprobing,
Not at all that was solved in a second. Will send you pics later.
as are all cars made, this is an acquired skill. with patience.
ok you die it wrong.
do not use the battery lugs, no not use the engine metal.
Got it. Will try again the right way tonight.

we want to see what the ECU is doing to the ISC only (rubber meet the road testing , the real deal)
its just 2 wires connect up and read it. backprobled,
your DMM could care LESS the polarity, (digital it is , with bipolar amps inside) un like any needle meter,
Got it. Thanks for that little piece of info.

to this , learn to use your meter
dial up, 20 VDC range.
now connect the 2 test leads to a 9 volt (smoke det. battery) in 60s called a "transistor radio battery"
see that LDC< see that + sign or - minus sign
Ok, yes Ive seen this happen.
now reverse the leads, see the sign change, and still read 9v. bingo, meter is BIPOLAR..
if you worked on computers you'd see minus power supplies, like -12v , and -5vdc, very common,
Hahaha i worked using computers but not on them. OK.


when folks say car runs great, it means zero to me.
seen 1000s say that, in limphome and backup modes.
Would there be lamp flashing in cluster, if Yes? Not mine. No lamp and have to use jumper clip? well 12;s all the way the times I have done it
what it means is car moves. ok, kinda.....
and a trail of black smoke behind it.
Not mine, either.

i told you can take any 90s car that runs and find 5 or more thing wrong, very wrong. (never seen an exception)
the car is designed to run with bad things... unlike any carb car made, EFI runs, under horrid conditions.
my lawn more runs, and has no spark advance. zero !
see?
so will back up mode and will run just like lawn mower, black smoke everywhere.

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I'm from Missouri. show me!
Was not it TX?


i never assume, why do that?
your car will not idle right,
Thats what we are trying to fix.
i can list 20 things wrong that can cause that..

assuming is wrong to any tech,
we assume there is one thing, a car there, NOTHING ELSE.
Agreed

The mech, drives car, scans it , check to see if all sensor read rigth.
see that close loop works at hot idle and light cruise.
and that the EGR works
First thing fixed on it a long time ago, remember?
and the idle switch and the idle controls all wokr.
all this in a test drive , that i cant do.
i can find like 5 things wrong in 5min, sometimes, seconds.
Thats why Im asking you. I know not being here makes it difficult but I got to try.
by sight , sound , and felt. (smelt, raw HC black smoke, fuel leaks smells, burning oil... , and overheated CAT i can smell fast but not here.)

your car id have heared the idle wrong (hot) in 1 second., and that it not regulating in 1`min.

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if you had a real tachometer
we'd have seen idle too low, way back when
see?
see how tools make the man (makes a tech savvy)
just by knowing what 800 means.... and holding.

i can hear misfire
i can see and engine shake at idle.
i can hear the isc hunt
i can see the ISC not working at all in what 5 min work. or less, (fixing it way longer)
i can see 12s flashing driving for 1hour,
i can test the idle switch to see if it works 10 times in a row.. no less. blip, blip, blip, yup seems to work.
then make sure the isc pinch test works.
then check spark timing, if way off, setting the Duty cycle is a total waste of effort.
in about 1hr work i can check all things on the engine, using tools. with a scan tool faster.
I can tell some but when in doubt you ask the person that knows the most, in this case you sir.


the car is old , somethings are bad. some weak. some flakey,
what's new here? nothing,
Well overhauling ignition system components, EGR and timing component don't count? Now overhauled tranny? Already driven 200 miles going up, down and no probs on that. You have to know all these have been replace with real parts, and no china knockoff crap. These are new. But not the sensors and thats where we focusing now.
all old cars are like that. all are.
never seen one example opposite.

I want to fix my problem, with a limited technical knowledge, that you have but I don't. Is like me pretending you to digitally retouch a picture the right way with the right tools in 5 minutes. It won't happen, cause thats not what you are good at. But Ill do my best. Im very patient and above all, I like doing things the right way.

Thank you sir.