Idk

[93luxurysnake]

does anyone else have a 93 mark (driller i know you have the exact same car as me)that randomly cuts out (like you cut the key off and back on really fast) while driving the tach bottoms out and the car loses all power for the brief moment any ideas would be helpful it has almost got me t-boned twice

 

[Austin]

AC running? Mid turn? Any reoccurring things you happen to be doing when it happens?

 

[93luxurysnake]

just running down the road ac dont work needs recharging it just does it randomly if it does it while idleing it shuts off then i restart it an its good sometimes it will do it once a week and other times once or twice a day

 

[Austin]

Does the engine bog down while you're turning, say while in a parking lot?

 

[93luxurysnake]

only when i turn the wheel from the pump pulling it down

 

[tixer]

Sounds electrical to me. Wiring pinched somewhere, or maybe a failing alternator?

Check all of the regular connections, (battery, alternator, grounds) I know with my addco front sway bar I ran into some pinching issues with the harness for the crank position sensor that did something similar..

 

[Stone17]

Throttle Position Sensor or idle air control valve. Is my guess.

 

[Austin]

I was thinking IAC, as that sounds like a more extreme version of the issue I was having.

 

[chris2523]

if it stalls while your foot is on the accelerator pedal, its not IAC. because there is still air going into the engine via the throttle plates.
if it does it randomly while driving and while idling, i'm not a fan of the TPS either. cuz that would mean it has failed in multiple places, and somehow messes with the tach bottoming it out? (i assume he means more than the normal rpm drop while the engine has no power for a few seconds)

like tixer, i think its electrical. wiring. alternator. pcm. power to pcm. battery terminals. something along those lines.

 

[racecougar]

I'd be looking at the crank position sensor circuit.

 

[driller]

I'd be looking at the crank position sensor circuit.

Bingo, no CPS signal, no spark, no tach.

 

[93luxurysnake]

ok i have changed the cps the iac and the maf and the problem still exists and its not the alternator as i have just replaced it two weeks ago

 

[93luxurysnake]

i really need a whole wire harness for this thing inside and out as the guy who owned it before me wasnt all that bright and an unrelated topic anyone know much on the sun roof workings?

 

[chris2523]

what brand alternator did you use? a new motorcraft? or a box store reman? i've had remans be bad straight out of the box more than once.

 

[racecougar]

ok i have changed the cps the iac and the maf and the problem still exists and its not the alternator as i have just replaced it two weeks ago

Replacing the CPS isn't going to remedy a pinched wire or poor connection in the circuit. Typically, if the CPS has failed, it's failed. It won't be intermittent. A problem in that circuit on the other hand...

Break out your multimeter and watch continuity while wiggling/jostling the CPS wires.

 

[driller]

I would replace the CPS harness connector. Cut, splice and solder in a new pigtail.

 

[KStromberg]

I would replace the CPS harness connector. Cut, splice and solder in a new pigtail.

+2

 

[tixer]

I would replace the CPS harness connector. Cut, splice and solder in a new pigtail.

this: mine failed a few inches back from the plug. Due to the plastic shroud on the cable, it didn't even look that bad, but it was visibly damaged. The wires inside however, were crushed.

 

[chris2523]

Typically, if the CPS has failed, it's failed. It won't be intermittent..

nope. had two that were intermittent.
tach worked when the car died and was coasting down the road as well.

i don't think this is the problem...