Cadillac Repair: 95 Cadillac Seville long start/idle stall/battery no charge, cadillac seville, climate control

Question
QUESTION: Hi, I've been having problems lately with my 95 Seville, I'll try to explain them best as I can.

For several months now, I have had a problem with the car taking a long time to start, as in cranking for 10+ seconds before it finally catches and turns over.

I also have had troubles with it at idle having the RPMs fluctuating and sometimes the car will stall and die.  I'll put it in neutral, start it back up, and go again. It has never failed to start immediately after stalling.  I am assuming this is somehow related to the first problem.  

Over the past couple of days I have noticed it acting funny while on the highway, it drives just fine but my A/C will sometimes blow slightly slower, then speed back up, and I notice my headlights go slightly dim at the same time, then go back to normal brightness in sync with the A/C blower.

Now today I was driving to a friend's house and the blower slowed down from max to about half speed without me touching the climate controls.  The dash popped up a "BATTERY NO CHARGE" warning.  The A/C still worked, the car still ran, and ironically it seemed like the RPM jumping problem went away, I didn't feel like it would stall for the first time in a long time.  

I looked at the serpentine belt, it seems ok, doesn't look worn.  It also seems to go on it's path freely when the car is running, nothing catching or slowing it down.

The codes I got when I did the climate control off/warmer trick are as follows:

code p020 history
code p022 history
code p053 history
code p070 history
code p095 history
code p110 history
code I042 history
no acp codes
no sir codes
no tcs codes
code s044 history
code s060 history
pcm?

The only work I have really done on it recently are to change the air filter and clean the throttle body, didn't seem to help.  I have also replaced the fuel filter not too long ago, that didn't seem to help either.
Any help would be greatly appreciated!

ANSWER: CLEAR (erase) ALL the codes from the computer and drive the car and see which codes come back as CURRENT or HISTORY.

---------- FOLLOW-UP ----------

QUESTION: I had the alternator replaced, it had gone bad.  The car still stalls / RPMs jump sometimes when I let off the gas to coast or make a turn.  The long start problem is still there as well.  I haven't cleared the codes manually yet, but I assume that having the charging system circuit broken for an extended period of time while the alternator was replaced has done that as I have a different set of codes now.  If you would still like a manual code clear let me know.  The new codes are as follows:

code p052 history
code p095 history
code p109 history
code i052 history
no acp codes
no sir codes
code t085 history
code s044 history
code s060 history
pcm?

I did what I could to clean the MAP sensor, although not much could be done since it's just a small hole.  I shot some electronics cleaning spray into it, the STP quick drying kind.  That hasn't seemed to do anything.

I have talked to a few auto-inclined people, what I believe my problem has been narrowed down to is bad MAP sensor, bad idle control motor, or bad fuel pump.

I read that bad MAP sensor can lead to surging, which is what happens when the RPMs drop almost to 0 then leaps past 1000.  I don't know if the idle control motor is the problem, it seems to do OK when I watch it with the hood up in the garage.  The fuel pump theory makes sense due to the extended amount of time it takes to start the car, I have been told the line should pressurize in a second or two and the long start could be the pump failing to pressurize the line in a decent amount of time.

Thanks in advance for your help!

Answer
Clear ALL the codes from the computer via the climate control panel or via a diagnostic scanner and drive the car and see if any codes come back as HISTORY or CURRENT..

Fuel pump test:

1. Get yourself a helper.

2. remove the gas cap.

3. have one person listen in the gas tank at the gas cap opening.

4. have the other person turn the ignition switch to the ON position ONLY so as the dash lights come on. Do NOT attempt to start the engine.

5. As soon as the ignition key is turned to the ON position, The person at the gas tank should hear the fuel pump run for TWO SECONDS and then it should STOP.

6. Does it ?.


If you do NOT hear it run, in most cases the fault is the fuel pump relay or the fuel pump..

Test the fuel pump pressure.