91 ES rough idle when cold

[PWMAN]

The only reason you would need to re-torque them is if you used head studs. I use mopar performance head bolts and gasket, torqued to the standard 45/65/65 1/4 turn in the correct pattern and never re-torque them. I run 20 PSI daily and have a heavy foot, I've never blown a head gasket.
Oh, please tell me you are not using fel-pro head gaskets....they are notorious for blowing. If it's not smoking or overheating I doubt it is the head gasket though.

[4dr92cavi4cyl]

Well, I know it NOT the head gasket cuz like u said, it's not blowing any smoke.

OVERHEATING?… after taking the distributor to advance the guy show me some white spots on the wires (Mopars, BTW) he said I should replace them and the rotary button and that the coolant temp. sensor may be bad, proving my theory correct about it running too rich. If the sensor is telling the ECU the motor is colder than it REALLY is, then when the head cracked/gasget blew before, it DID get hot, but the gauge never went above two-thirds, because the sensor is malfunctioning.

So it is this that caused the damage to my wires, sound reasonable?

I told her not to drive it until we fix it, she can't anyway without wires on it,LOL!

'course I don't have the money to fix it yet but, I just got paid! Life sucks! I work hard 40 hrs a week only to send it all to someone else's pocket. Remember…

IF THE WORLD DIDN'T SUCK, WE'D ALL FALL OFF!

[SVTcobra306]

The coolant temp sending unit and sensor are 2 totally different things on these cars.

Also, the cracks between the valve seats are considered a fact of life with these cars, especially the turbocharged ones. They do not negatively affect anything.

I say get the TPS checked and replace the HEP.

[4dr92cavi4cyl]

Thanks for the reply, like I said, 'till I get money it'll sit for a few weeks.

If it was the TPS wouldn't the thing run just as bad after warm up and while driving? I runs great after the shaky start. I'm not an expert but I do have a good understanding of what many parts do. I was curious one day and I took the TPS of my Cavy and it didn't look user serviceable. I put it back on and when I turned it on, it idled high for a minute, I shut it off, started it and it was fine. I guess the ECU had to reset itself. It just spooked me so I don't want to mess with the TPS on hers.

[PWMAN]

I'm not too knowledgable about TBI cars, but on turbo cars we have a AIS sensor that when it's first started gives a spuratic idle but the engine runs completely smooth once warmed up for 15-20 seconds.

[4dr92cavi4cyl]

PWMAN, what's the AIS (air intake sensor?)

SVT Cobra306, that's right, I think he said the temp sending unit, not the sensor. How can the Hall Effect Pickup go bad and (feels stupid) what does it do besides hold the dist. I know it has the two/three wires on it and the connection is in good condition but it looks like all the wires all ground to the HEP, as if it was one wire!??

[SVTcobra306]

The Coolant Temp sensor is on the thermostat housing and it's the one the computer uses to read engine temp. The small one on the front of the head is the sending unit for the guage, mine doesn't even have one of those anymore-it has an autometer sending unit hooked to my autometer guage.

The HEP tells the computer what RPM the engine is running and is very important to the motor running properly (timing, injector firing, etc.) Usually if it goes out, the engine will simply not run, but it could cause other issues.

When was the last time you did a good tuneup and changed the fuel filter?

[4dr92cavi4cyl]

WOW! It's been awhile… I finally got 'er running, bought new wires, dist. cap, rotor, and plugs. It's starts much easier and dosen't sound bad at all like it did. It does have an occasional miss when cold, can't tell if it's one cylinder or if maybe the injector is dirty from sitting, but it's not as bad as it was.

The points on the old wires were burned BAD! The rotor was worn down a little too. I couldn't get Mopar wires from Advance Auto, they said I'd have to go to a dealer, F**K that! So I got the Autolite Professional Series, they have a LTD lifetime warranty so if they burn I can get more for FREE!

I got the timing pretty damn close to perfect, but it feels like it's not putting all the power to the ground. It used to jump off the line like out like a bat outa hell! Now it takes a second to get moving, but the motor sounds strong. ? I think it's just where it sat for a few weeks, she drove it around for awhile today and she said it's a litle better but still lacks the power it had. Does anyone know what might cause the tranny to lose power? Maybe the timing's barely off and the ECU is doing something? Help!

[4dr92cavi4cyl]

It did not have this problem before we fixed the ignition problem, why is it doing this?

[xzibit78572]

if i was you i would change the tps i took my car in to get check due to other problems the happened which i wont get into and the guy at the dealership said i had to change it other wise i was going to notice why in the winter time now she starts up good but yeah i had the same problems too

i have a 90 daytona es 2.5l turbo just so you know

[4dr92cavi4cyl]

The TPS has nothing to do with the operation of the tranny.

I advanced the timing a little and now she runs better than ever! No more problems... YET!

Had to figure it out myself... thought I'd let you all know it's over, and thanks for the advice!

[submachine69]

hey check for technical service bullitens i belive there is one for a rough idle when its cold, and i dont remeber but i belive it had in there that it a was when it was wet also, but check, if u get lucky and it is then you should be able to get it fixed for free