computer error - 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.

Reply
 
 
 
Thread Tools Search this Thread
Old 03-19-2009, 12:44 PM   #1
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Posts: 259
Thanks: 0
Thanked 0 Times in 0 Posts
bigbadbonneville is on a distinguished road
Default computer error

My 1993 SSEI Bonneville just got a new fuel pump and fuel filter put in. the symptoms - it will run for about 20 minutes and then cut off. Codes - 99 PMP. 69 - High Press. SW. circuit. 68 Cruise Control command 67 - Cruise control switch - 66. A/C pressure sensor/circuit prob. 88 - PCM reset.

Note none of the problems in the A/C or Cruise control present and works completely fine. - No SEL present but the computer is throwing these codes. Is my computer going bad.

The car runs fine, but idles with a slight miss. Has all new wires, iridium NGKs and all new GM coils., new UIM gasket and new supercharger. changed within 2 months. Please help me on this I believe my computer is going bad and needs to be replaced.

Moved to 92-99 TD
bigbadbonneville is offline   Reply With Quote
Old 03-19-2009, 02:44 PM   #2
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

That is very odd. I'd probably start by checking the grounds in the engine bay and then the connections at the pcm to check that it'* not an intermittent bad connection.
BillBoost37 is offline   Reply With Quote
Old 03-19-2009, 03:45 PM   #3
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Posts: 259
Thanks: 0
Thanked 0 Times in 0 Posts
bigbadbonneville is on a distinguished road
Default

Quote:
Originally Posted by BillBoost37 View Post
That is very odd. I'd probably start by checking the grounds in the engine bay and then the connections at the pcm to check that it'* not an intermittent bad connection.
your absolutely right, I have been checking all connections and grounds. I have new cables from the dealership and not some cheapy trash auto brand on an Optima Red Top Battery. I even checked the ones on the door sills on both sides. I believe my computer is flickin out.
bigbadbonneville is offline   Reply With Quote
Old 03-30-2009, 10:49 AM   #4
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Posts: 259
Thanks: 0
Thanked 0 Times in 0 Posts
bigbadbonneville is on a distinguished road
Default

Quote:
Originally Posted by BillBoost37 View Post
That is very odd. I'd probably start by checking the grounds in the engine bay and then the connections at the pcm to check that it'* not an intermittent bad connection.
I replaced the ECM - went well - working fine so far. - just want to know, do I just let the car run for awhile and drive it till the computer relearns itself then run a scanner on it. Is there a way to adjust the computer for fuel/air ratio or mixture and rev-limiter? What are the steps after installing the ECM. Oh I took out the Jet stage II PROM and used the Original PROM. Not sure if the JET Stage II is bad.
bigbadbonneville is offline   Reply With Quote
Old 03-30-2009, 01:46 PM   #5
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

GMTuners should be able to help you program a new chip. Otherwise.. there'* really no support for tuning. Unless you consider a Jet chip and AFPR tuning.
BillBoost37 is offline   Reply With Quote
Old 04-03-2009, 05:57 PM   #6
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Posts: 259
Thanks: 0
Thanked 0 Times in 0 Posts
bigbadbonneville is on a distinguished road
Default

Quote:
Originally Posted by BillBoost37 View Post
GMTuners should be able to help you program a new chip. Otherwise.. there'* really no support for tuning. Unless you consider a Jet chip and AFPR tuning.
Okay got the new computer is in and scanned, ran the car - ran good all day - then whamm. the car dies - wait 20 minutes starts up - then runs for about a 1/8 of mile dies again. Not sure what the problems is going on - does anyone have a clue or have the same symptoms. My 93 ssei bonne only has 153,000 miles.
bigbadbonneville is offline   Reply With Quote
Old 04-03-2009, 06:12 PM   #7
Senior Member
True Car Nut
 
Purplehazeir's Avatar
 
Join Date: Sep 2008
Location: Arlington, WA
Posts: 7,979
Thanks: 0
Thanked 1 Time in 1 Post
Purplehazeir is on a distinguished road
Default

I've seen some goofy things with electrical components when they heat up. Small cracks and stresses get bigger connection points move apart and power drops off. Circuit boards warm up and layers no longer touch and power drops off.

Does the car just suddenly shut down or does it studder stall?
Any other electrical system shut down when the car dies?

I'm stumped.....
Purplehazeir is offline   Reply With Quote
Old 04-04-2009, 11:17 PM   #8
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Posts: 259
Thanks: 0
Thanked 0 Times in 0 Posts
bigbadbonneville is on a distinguished road
Default

Quote:
Originally Posted by Purplehazeir View Post
I've seen some goofy things with electrical components when they heat up. Small cracks and stresses get bigger connection points move apart and power drops off. Circuit boards warm up and layers no longer touch and power drops off.

Does the car just suddenly shut down or does it studder stall?
Any other electrical system shut down when the car dies?

I'm stumped.....
I'm just as stumped as you are. the car will run fine then it just quits - wont start, no power to the spark plugs. I changed out the electronic control module under the coil packs to see if that was it. still nothing. even the repair shop where its at doesnt seem to know what the problem is. New crank sensor, new computer, new fuel pump and filter.
bigbadbonneville is offline   Reply With Quote
Old 04-14-2009, 04:23 PM   #9
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Posts: 259
Thanks: 0
Thanked 0 Times in 0 Posts
bigbadbonneville is on a distinguished road
Default

Quote:
Originally Posted by bigbadbonneville View Post
I'm just as stumped as you are. the car will run fine then it just quits - wont start, no power to the spark plugs. I changed out the electronic control module under the coil packs to see if that was it. still nothing. even the repair shop where its at doesnt seem to know what the problem is. New crank sensor, new computer, new fuel pump and filter.
Wow I guess everyone is stumped - I have had already 2 auto repair shops whom looked at my car and none of them seem to know what the problem is. - Looks like I might have to take it to the dealership. What I might do is go back - change out the elec.control module and see if that could be it, I might put the original one back in and see if it starts. If not, not sure what to do. These freaking bonnes seem to have alot of electrical problems.

Last edited by bigbadbonneville; 04-14-2009 at 04:24 PM.
bigbadbonneville is offline   Reply With Quote
Old 04-19-2009, 12:14 PM   #10
Junior Member
 
Join Date: Apr 2009
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
95 bonnie is on a distinguished road
Default

hey there,got a 95 not charged....same thing,it is not the cam sensor already did that trying the comp next will inform of results
95 bonnie is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Price of gas, economy or computer error GunsOfNavarone Lounge 8 03-14-2010 08:27 PM
95 Computer Prob., Will this work without new computer loud95sse Everything Electrical & Electronic 2 10-25-2007 02:58 PM
Tech info error iRocco General GM Chat 7 01-30-2003 01:13 PM
Forum Error buickpower3800sc Performance, Brainstorming & Tuning 4 01-28-2003 07:34 AM
Error 41 (cam sensor circuit) on bonnie 93 se gnes 1992-1999 5 11-10-2002 09:01 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:26 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.