Sudden Death... Not sparking! Bad ICM? How do I test it? - Page 5 - 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 02-24-2007, 07:58 PM   #41
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Nov 2005
Location: Minneapolis, MN
Posts: 78
Thanks: 0
Thanked 0 Times in 0 Posts
stuffelse is on a distinguished road
Default

The verdict is in: corroded Ground Bus Connector, complicated by vacuum leak

The reason the car didn't want to run after I cleaned the GBC was the broken vacuum secondary gasket. Got that replaced earlier today, jumpstarted and it fired right up. I'm gonna let it run for about 2 hours to charge the battery because I don't have a charger up here, but it'* running just as bad as it was before


Thanks all for your advice & help!
stuffelse is offline   Reply With Quote
Old 02-24-2007, 10:42 PM   #42
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Nov 2005
Location: Minneapolis, MN
Posts: 78
Thanks: 0
Thanked 0 Times in 0 Posts
stuffelse is on a distinguished road
Default

I was wrong, it'* still not fixed....


drove it around, ran fine, even stopped at a friend'* house for 10 minutes or so to make sure it would start again, and it did. I then decided i was safe to go grocery shopping.
WRONG.

The car is currently sitting in the parking lot at my local Cub store. It is not sparking.

I tried dumping cold water on the crank position sensor just in case, but that had no effect.

I tried cleaning the connection between the coil mount plate and the bracket, and di-electric greased the mount plate, mount studs, and wiring harness. Still no spark, even with a jump assist. Also, I was careful to not get grease between the connections on the harness to prevent grounding between contacts.

I abandoned ship and had my friend give me a ride home because it'* about 18 with a 30-40mph wind out there.
any ideas?
stuffelse is offline   Reply With Quote
Old 02-25-2007, 01:55 AM   #43
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Nov 2005
Location: Minneapolis, MN
Posts: 78
Thanks: 0
Thanked 0 Times in 0 Posts
stuffelse is on a distinguished road
Default

OK here'* something I hadn't thought of. I've been getting that Camshaft Position Sensor code for like two weeks. I think it threw the magnet(the engine light came on at something like 5100rpm), and I have like NO tools up here, so I was hoping to do it over spring break.

Can the cam sensor make it not spark? It ran fine for damn near two weeks with the engine light on.

Could it be the ICM? How do I test it? How much is a replacement one?
stuffelse is offline   Reply With Quote
Old 02-25-2007, 10:22 AM   #44
Senior Member
Certified GM nut
 
Join Date: Oct 2005
Location: Western New York
Posts: 1,942
Thanks: 0
Thanked 0 Times in 0 Posts
Technical Ted is on a distinguished road
Default

You should check for spark at each of the three front cylinders to rule out a bad coil.

The fuel pump & ICM both get 12 volts from the same fuse. If you can hear the fuel pump then most likely the ICM is getting power. I still like to make sure the ICM is getting 12 volts before changing parts. The pink/black (pink some years) wire going to the ICM should have 12 volts while the key is in the run position.

If you have 12 volts to the ICM & no spark to the front cylinders then it'* a problem with the ICM/coils, crank sensor or the wiring between them. Most often the problem is the crank sensor but we've seen problems with all three. The best way to rule out the ICM is swap ICM & coils with another car. Any of your friends have the same engine?

I believe a new ICM will cost between $100 - $200 & crank sensor is between $30 -$50.

Edit - Cam sensor will not prevent engine from starting.
Technical Ted is offline   Reply With Quote
Old 02-25-2007, 02:51 PM   #45
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Nov 2005
Location: Minneapolis, MN
Posts: 78
Thanks: 0
Thanked 0 Times in 0 Posts
stuffelse is on a distinguished road
Default

well i just replaced the crank sensor within the last couple years. It'* not dieing with heat like it did the last time it was culprit. Would that info make it less likely?

being away from my own garage and tools really bites...
stuffelse is offline   Reply With Quote
Old 02-25-2007, 03:26 PM   #46
Senior Member
Certified GM nut
 
Join Date: Oct 2005
Location: Western New York
Posts: 1,942
Thanks: 0
Thanked 0 Times in 0 Posts
Technical Ted is on a distinguished road
Default

Having been replaced a couple years ago may make it a little less likely to be the problem. You might want to try a junkyard for ICM & coils.

I forgot to mention in my last post that I wouldn't try pouring water on the crank sensor in freezing weather. You may have created an icy mess that could make it hard to start till the next thaw.
Technical Ted is offline   Reply With Quote
Old 02-25-2007, 04:03 PM   #47
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Nov 2005
Location: Minneapolis, MN
Posts: 78
Thanks: 0
Thanked 0 Times in 0 Posts
stuffelse is on a distinguished road
Default

yeah i kinda figured that, but the engine was stil pretty warm to the touch when i did that, so I can only hope that it all dripped off...

I'm thinking I'm just going to have to admit defeat and have it towed to a shop, because I just don't have the utilities to work on a car up here, specially now since it'* actually snowed... I already have to have it towed unless it magically starts when I get back to it.
stuffelse is offline   Reply With Quote
Old 02-26-2007, 12:08 AM   #48
Junior Member
Posts like a Ricer Type-R
 
Join Date: Oct 2006
Location: north las vegas nv
Posts: 18
Thanks: 0
Thanked 0 Times in 0 Posts
rock vegas boy is on a distinguished road
Default WOW

Sounds like the exact same thing on my Bonnie......any insight?
rock vegas boy is offline   Reply With Quote
Old 02-26-2007, 12:09 AM   #49
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Nov 2005
Location: Minneapolis, MN
Posts: 78
Thanks: 0
Thanked 0 Times in 0 Posts
stuffelse is on a distinguished road
Default

shamefully....

I had it towed to a shop. I'll let you know what happens.
stuffelse is offline   Reply With Quote
Old 02-26-2007, 12:32 AM   #50
Junior Member
Posts like a Ricer Type-R
 
Join Date: Oct 2006
Location: north las vegas nv
Posts: 18
Thanks: 0
Thanked 0 Times in 0 Posts
rock vegas boy is on a distinguished road
Default

OK......You keep me posted....and I'll keep you posted! Read my original post as "can't find the problem" and see if it sounds familiar!
rock vegas boy is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Bad, bad, bad, bad vibrations.... SilverSleeper8704 2000-2005 11 07-30-2010 06:42 AM
sudden death of a 90 LE theprodigalstranger 1987-1991 34 03-06-2005 09:29 PM
not good. NOT GOOD. (hit and run, not bad-BAD, but not good) repinS General GM Chat 13 11-26-2004 11:35 AM
Cylinder #5 not sparking. SSEimatt93 1992-1999 60 02-24-2004 09:01 PM
3rd plug is sparking!!! Glasuan 1992-1999 10 01-20-2004 09:29 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 02:11 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.