i have a 97 ta .the problem i have is car runs then shut off it might
take 1 mile or 50 miles . then it will shut down and i will have to
wait five to ten min to start back up .i changed the ignition sw
drove the car for a day no problem. then last nite it shut down.
fuel isn't the problem i checked it. it tested good with car car dead.
finally got a code p1351 so i checked white wire from icm to pcm
no brake in it .i replaced icm and coil and cleared codes .
still same problem .
can any one help ?

 

If the 1351 returns than the problem is most likely at the connections. The problem is you're loosing continuity. Try tightening up the female pins with a pick or the like.

 

ok i found the bad connection.now i have high reading on white wire
to the icm and my car is now missing .is my opit going out?
i tested the coil and changed wires still same miss.

 

What exact reading are you getting on that white wire while cranking???

How about resistance on the coil??

LUK,
Ivan

 

the coil has 5700 ohms.ill have to test the white wire tomorrow.

 

Make sure you got that 1-4 vdc while cranking on the B terminal...

Also, check the A terminal to ground and D terminal to ground with the Key On Engine Off....

Both should read 12vdc.

Keep at it,
Ivan

 

ok i finally got to check
when car would run .b was 1.36 volts
a was 11.50 volts.
d was 11.50 volts
when car shut it self off
b 0.15 volts
a 11.50 volts
d 11.50 volts
now where do i go from here? car only runs maybe 5 mins or less now.

 

The code sets when the voltage on circuit 423 (the white wire from PCM pin A12 to pin B of the ICM) exceeds 4.6 volts. That is generally caused by an open circuit.

You need to set your volt meter to AC volts when checking the voltage on pin B, when the engine is cranking or running. Its a pulsing circuit.

Have you checked the ground for the ICM, making sure there is not a layer of corrosion under the washer?

An "open" in the primary voltage to the coil will also cause the code to set. That's also the power supply to the ICM. Check the wiring for corrosion or breaks.

There's a good diagnostic chart in the factory manual. You need to see if someone can copy it for you.

 

i just did the cooling mod and the the ground wires hoops were clean.
i will check the b pin set on ac setting and as soon as i can get
the car in side i will check harness .it is -5 today
does any one have the factory wiring manual that i could get a copy or buy
thanks

 

ok i have checked all the power wires and have power every where .
no power to the white wire i checked this with meter set on ac.
so checked the wire for continuity and it is good.
is it safe to say that my opti has taken a crap since
pcm is not sending voltage to the icm?

 

Then you should have a code for the Opti pulse signal.

 

ok every one i have tested every wire so the only thing that can
be bad is opti or pcm . but i took my opti apart rotor was lose inside
i believe this was the cause of my miss fire . as for the pcm being
bad i think it is good. but i will have it tested

 

Your next post better be....

"....Car runs perfect now!!... "

We need to get the positive feedback !

Good luck,
Ivan

 

ok people i put in a opti now the car starts and runs . my opti failed
and their was no codes for opti going bad. just p1351 open on icm
white wire. so thanks for the help every one.and i hope this will help
some one

 

It appears your Opti failed because the rotor came loose. There are no codes for the high voltage section (cap/rotor) of the Opti. The only codes the Opti sets are for failure of the signals from the optical cam position sensor. That's the part of the Opti that has to work for the PCM to know when to send a signal to the ICM to fire the plugs.