Multiple issues w/95 bonneville sse - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-14-2006, 05:58 PM   #21
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Default Re: stalling

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Originally Posted by mamoru
I never know when it is going to stall out, appears to be totally random. Usually it goes weeks to months with no problem and then all of the sudden it will either die while driving it or it just will not start, could be first thing in the morning or after driving it for awhile. Temperature does not seem to come into play. The engine always cranks fine but won't start. When it dies and will not re-start I have found that there is no spark.

Prior to the engine light coming on while driving home the car always idles OK, maybe a little rough but not like the miss that it feels like it has now. No check engine light ever came on when the car suddenly stops running. I was hoping that when the light finally came on (drive home) that maybe it would point me to the problem with the car stalling. At this time it almost seems like it is two different issues.

Actually there is one more thing I forgot to mention... engine cooling fan does not turn on either. It runs briefly (few revolutions) when car is started and then never turns on again. Figured the fan temp switch is probably faulty and is maybe by-passed on initial start up.

Actron support requested the FW/SW version of the tool, said it may be an older version that had a bug. Just bought it a few days ago so unless it has been sitting around for awhile on the stores shelf I find this highly unlikely.
This is different stalling than what I experienced caused by PCM. In my case, it would always re-start and run, but would stall more and more frequently.

Not sayin' your problem could not still be the PCM, just that the symptoms are different. I wonder if it could be the crank sensor. That, at least is not too expensive to change out.
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Old 09-14-2006, 06:20 PM   #22
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Default Re: Multiple issues w/95 bonneville sse

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Temperature display on climate control flashes for like a minute or so when key is turned on and/or car is started and then stays on, asked dealer and was told to wait until it completely fails as trouble shooting would cost more than car is worth. By the way AC is not working I believe it to be an interlock somewhere. It does hold a charge and I believe the compressor and clutch to be in working order.
Wow, all these issues in the same post are going to get confusing...FWIW, the flashing temperature control is an indication that the HVAC programmer has detected a fault in the system. Since you have indicated that the AC is not working, but believe the AC clutch is engaging and it is holding a charge, you may have a malfunctioning airmix door actuator. The actuator moves the airmix door in the ducting which adjusts to blend the amount of cold and hot air discharged through the system into the cabin. Do you get HOT air instead of cold?
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Old 09-14-2006, 10:19 PM   #23
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Yeah, sorry about all the issues in one post.
I will have to check and see if I get hot air instead of cold.
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Old 09-14-2006, 11:57 PM   #24
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OK, the air temp does not seem to be any different with AC turned on or off. I hear a click from the passenger side when I select or de-select the AC but I do not hear any actuator movement, also do not feel any difference in engine idle as I would expect when the AC is normally turned on.
Both ground blocks (passenger and driver side) appear to be in good condition, no obvious corrosion or damage.
Still have had no luck communicating with the PCM.

By the way, thanks for everyones suggestions and help so far. Greatly appreciated!
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Old 09-15-2006, 12:43 PM   #25
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Quote:
Originally Posted by mamoru
OK, the air temp does not seem to be any different with AC turned on or off. I hear a click from the passenger side when I select or de-select the AC but I do not hear any actuator movement, also do not feel any difference in engine idle as I would expect when the AC is normally turned on.
Both ground blocks (passenger and driver side) appear to be in good condition, no obvious corrosion or damage.
Still have had no luck communicating with the PCM.

By the way, thanks for everyones suggestions and help so far. Greatly appreciated!
You should always be able to connect with the PCM I guess we could call that the Hand Shake... The Tool should then be able to talk to the PCM with next to nothing for issues...

The Stalling could be a number of things but you have me leaning more and more towards the PCM...

I am a little freaked out by the fans turning on for a moment during startup... No matter what sensors are on the 94-95 3800 the PCM turns on the Fans directly either via the AC or the Temp... The PCM uses a High and Low speed relay for this...

If the Scantool could talk to the PCM you should be able to monitor this...

What Scantool do you have? CP9110 or CP9145?

Nevermind... It helps to read.... I see its a CP9145... I could get video of mine for you if you wish

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Old 09-15-2006, 12:57 PM   #26
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Quote:
Originally Posted by mamoru
Yeah, sorry about all the issues in one post.
I will have to check and see if I get hot air instead of cold.
Don't worry about all the issues in one post. I just want to make sure we don't lose you as we toss ideas out.

Anways, on the no A/C. Double check to make sure your compressor is engaging.

If it is, then you may want to remove the glovebox, and look through a small hole in the dashboard bracing. The hole you want to look through will be the one closest to the driver'* side as shown in this pic.

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This pic is looking through the hole, behind the glovebox that shows the airmix door actuator rod in place in the white connector that is attached to the airmix door to determine how much hot/cold air. There is small black plastic box that you can't see that drives that rod. While looking through the hole, adjust your temperature on the contol panel and observe what the rod does. It should move all the way to the paseenger side for full heat, and all the way to the driver'* side for full cold. It is bind, pops, or clikcs and doesn't move or moves erratically, then the airmix actuator is broken.

Here is a drawing showing the airmix door actuator location. You can't get to it though the glove box. You have to go from underneath or take the dashboard off.

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And if all else fails and you can't fix it at the moment, you can always rig it for the time being as shown in this link: Wren'* Redneck Fix
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Old 09-27-2006, 06:34 PM   #27
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I finally found some time to work on my car... It appears as though the actuator is working correctly but it does not appear that the AC compressor is engaging. I was told by the previous owner (my father) that you can force the compressor to run by shorting it, or something like that. He told me it tells you how to do it in the manual. Anyway, even when he had the compressor running it did not produce cold air. It has been verified that the system does hold a charge.

Was never able to get the computer to communicate so I gave up and returned the scanner, however when I pulled the computer out of the car I noticed that the ID number on the removable module in the computer does not match the label on the outside of the computer. Not sure if that means anything but thought I would mention it.

Guess I am not sure where to go from here - with the climate control issues and the check engine light. Any more suggestions?
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