Chrysler Repair: does not crank when the car is warm, solenoid switch, 1994 chrysler concorde


Question
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Followup To
Question -
I have a 1994 Chrysler Concorde 3.5L. The car starts excellent when is cold in the morning. But sometimes after driving a while, I have to try two to three times for it to crank. Some people say it could be Camshft Sensor. Please help.

Thanks,

Ben
Answer -
Hi Ben,
I am unclear about the term "crank" because I think of that as the action of the starter motor, while you may mean that, or alternatively that the starter motor will "crank" the engine but that it won't "catch" or "start".
If it won't crank, then you have an issue with the starter motor or its control circuit. This can happen when the starter is overheated due to the adjacent heat source (the hot engine or exhaust system) and so it won't operate. Generally the starter motor has to be removed to determine if it is the starter motor or the solenoid switch that is at fault, and sometimes a heat shield may have been lost or mis-positioned. If that is your problem, listen to see if you hear the solenoid switch click at the starter motor location or not when you try the key. Let me know.
If it won't start, then you have a variety of reasons for than. Fortunately, there is on-board some diagnostic capability that you can tap into for help. You may well be able to do a self-diagnostic test that will help identify the reason because up thru the mid 90's the engine controller had a memory which stored fault observations as codes that the owner could readout without special instruments. Give this a try and see if it works, otherwise a readout with a tool is necessary.
Begin a readout as follows: Take your ignition key and turn the ignition switch "on-off-on-off-on" and leave it "on". Do this switching quickly so that no more than 5 seconds elapses. Then watch the 'check engine' light to begin to flash, pause, flash, pause, etc. Count the number of flashes before each pause and make a note of them in the order that they come. The last two flash groups will be 5 in each. Repeat the readout until you have the numbers accurately (the same result, two times in a row). Then pair the numbers two at a time in the order they came, to form two-digit numbers, for example the last number will be 55 which is the code for "end of readout". Then write back and tell me the other numbers that came out and I'll see if any of them are related to your problem.
The camshaft sensor has a code (54) while the crank sensor has a code (11) but there are several other possibilities too numerous to describe. And the codes are the starting point for a solution not a total prescription.
So let me know.
Roland

Roland,

First of all I want to thank you for your time. However, to correct myself the car cranks. But it does not start. Regarding reading codes; I did exactly what asked me to do three times. I got a code of 55. It is so starnge. Because you stated it means the end of the read out. I will wait on your next response.

Thanks,

Ben

Answer
Hello again Ben,
I have one more idea for you. There may be one more sensor, this one mounted on the intake manifold and called a charge temperature sensor. It mainly comes into play under just the condition that you described. So look for a sensor that has a black/red and black/light blue wires on the manifold. It should have the same temperature charactieristic as the coolant temp sensor. It helps to get the correct mixture when the coolant is warm but the intake manifold has cooled off a bit. It is used on turbo 4 cyl engines, and the 3.3 and 3.8 V-6's. I don't have the diagrams for your 3.5 but see if yours doesn't also have such a sensor.
Roland