Chrysler Repair: 87 Chrysler Not Starting in Warm Weather, intake air temp, coolant temp

Question
Hello Roland,
I'm driving a 1987 New Yorker with the 2.2L Turbo engine. The car starts
and runs fine in cold weather but once the weather warms up above
freezing or so the car won't start good at all. It's starving right out
of fuel. Usually have to start it about 4 or 5 times before it finally
picks up enough fuel to run. Really dosen't run good after I do get it going, not as good as it dose when it's cold. Last fall it
was smoking out the exhaust bad because it was getting too much fuel.
Problem there was a bad map sensor. Put a new one on and it was fine. I
also replaced the throttle positioning sensor but that didn't help. I
have an idiot light connected to the fuel pump and that's operating OK.
The powerloss light code the computer is putting out right now is 2355.
I'm pretty the problem is one of the about 54 sensors it has. Do you have
any idea which one it would be. I suspect a temperture sensor.
Is there any one I can unplug or jump by to check it out before I buy too
many of the sensors I don't need.
Again, Starts right up and goes fine first thing on a cold morning.
Thanks very much for any help, Bert


Post Question on
Chrysler Repair Message Board is OK.


Answer
Hi Bert,
The 23 code is saying the charge (intake air) temp sensor mounted on the intake manifold or the rear of the valve cover on top of the engine is out of sorts. The supply wires are black/light blue and black/red. It should* show a resistance of 7,000 to 13000 ohms at 70F and 700 to 1000 ohms at 200F. It is crucial to starting with a warm engine and therefore presumably too in warm weather.
So that would be a good sensor to test as well as its wires to the logic module in the passenger compartment on the right cowl (right of passengers right shin) to verify the continuity between the two.
A 22 code on the other hand would implicate the coolant temp sensor located on the thermostat housing which has identical resistance characteristics and a tan trace wire and black/light blue wire, so re-read the codes to make sure you don't have a 22 instead of a 23 code. I believe that once you replace/verify wires on these two sensors your warmup problems will be solved. The 55 code means "end of code readout".
Roland
*these specs are from the '89 manual, but I suspect they are the same for the '87