1989 SUNDANCE 2.2 WILL NOT STAY RUNING WHEN TEMP. GET COLD ENG RUN GOOD WHEN TEMP.WARM WHEN WEATHER DROP BELOW 40 WILL START AND CUT OFF AND IT WILL START UP BUT CUT OFF.

Different engines can show different values. Sometimes it is the sensor itself that causes the variation. The pressures that you are witnessing are well within operation norms and are nothing to be worried about. As long as you don't experience severe drops in oil pressure during acceleration and deceleration, then the oil pressure system is working well.

Change your oil to a lighter grade. Maybe even try some Lucus Oil Additive. It'll help everything be more willing to move in extreme weather. Good luck!

Sounds like you may have blockage in the radiator. Give it a good cleaning and flushing.

I think this TSB will solve your problem even know your car is older.



NO: 18-05-96 Rev. A
GROUP: Vehicle Performance
DATE: May 24, 1996
SUBJECT: **Intermittent Rough Idle**
NOTE: This bulletin supersedes technical service bulletin 18-05-96 dated February 16, 1996 which should be removed from your files. The subject description was printed incorrectly and is marked with **ASTERISKS**
MODELS: 1991 - 1995 Acclaim/Spirit/LeBaron Sedan 1991 - 1993 Dynasty/New Yorker/New Yorker Salon 1991 - 1993 Daytona 1991 - 1995 LeBaron Coupe/LeBaron Convertible 1991 - 1994 Sundance/Shadow/Shadow Convertible 1991 - 1995 Caravan/Voyager/Town & Country NOTE: This bulletin applies to vehicles equipped with 2.2 liter and 2.5 liter engine and high pressure throttle body fuel injection.
SYMPTOM/CONDITION:
An intermittent rough idle may occur during cold engine operation, within 3 minutes after engine start up, in rainy weather and temperatures of approximately 30° to 50°F.
PARTS REQUIRED:
Quantity Part Number Part Name 1 4288298 Idle Air Control Motor (IAC) REPAIR PROCEDURE:

1. Remove A/C motor.
2. Install new IAC motor (P/N 4288298) and rubber O-ring, torque to 2 Nm (17 in. lbs).

CAUTION: The rubber o-ring must be installed with the IAC motor for proper operation.

I would also recommend doing a fuel pressure test to see if it loses fuel pressure overnight.

Could be a problem with your intake air temp sensor or your coolant temp sensor. The most likely would be the coolant temp sensor. It may be reading cold and will make it run good as the engine is cold but as it warms it is not adjusting the air fuel ration to the proper levels making it run rough hot

try starting with gas pedal to floor to shut off fuel during cranking to see if flooded. rule that out first.

if your pumping the gas pedal,your only giving it more air not fuel,the injectors are doing the fuel,what is the temperature there when this happened and was this a cold start or a warm engine start.

Those little shocks are gas charged, thus pressure increases in hot, and decreases in cold. Over the years they tend to seep, or leak a bit, thus, only work good in warm/hot weather. They have replacement ones at autoparts stores, and shouldn't be too expensive.

Yes.....The overall purpose of the thermostat is to keep the engine at a specific temperature for combustion purposes.
If the thermostat is open all the time:
1) Engine warm up is slow, heater and defrost function will be delayed and heater out put will be low.
2) Excess fuel consumption, fuel mileage will decrease due to low coolant temperatures.
3) Emissions testing will fail.
4) Excess carbon build up on spark plugs and combustion chamber, engine performance will begin diminish.
5) Moisture will condense on inside of engine crankcase causing oil contamination.
These are just a few things that will be caused by low coolant temperatures. Some will not occur immediately, but left unfixed, will decrease engine and transmission life expectancy.
Hope this helps, you can get by for a short time but it does need to be fixed.
Regards,

try runing so fuel injector cleaner through it and see if that helps plus if u have not had a tune up try giving it one anbd put a new air filter in it