Tester at Autozone - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 02-27-2004, 12:24 AM   #1
Senior Member
Posts like a Camaro
Thread Starter
 
padgett's Avatar
 
Join Date: Jul 2003
Location: Orlando, Florida
Posts: 872
Thanks: 0
Thanked 0 Times in 0 Posts
padgett is on a distinguished road
Default Tester at Autozone

Twice now I have gone to AutoZone with ignition modules (aka ESC, IDI, etc), both of which passed all tests on the Wells Analyzer but neither of which would run in the car. Evidently something critical is not being tested or loaded enough.

Symptoms were either does not start at all or started, ran briefly, then quit never to run again. Fuel was present and pressure was good. Crank sensor showed AC on crank. Everything pointed to module but tester insisted was good. Replacement of module cleared problem.

Spare ignition module and coil set is really a good thing to have & swap is easy. Then you know.
padgett is offline   Reply With Quote
Old 02-27-2004, 02:07 AM   #2
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Thanks, Padgett. I've often wondered about the accuracy of that tester. It seems too good to be true. I don't think it'* really possible to design a 'one unit tests all' analyzer like that.

I guess the best course of action would be to swap a spare, rather than get a suspected ICM tested. Damn good thing there'* alot of 3800'* out there. Easy to find a unit to 'borrow'.
willwren is offline   Reply With Quote
Old 02-28-2004, 12:04 AM   #3
Senior Member
Posts like a Camaro
Thread Starter
 
padgett's Avatar
 
Join Date: Jul 2003
Location: Orlando, Florida
Posts: 872
Thanks: 0
Thanked 0 Times in 0 Posts
padgett is on a distinguished road
Default

Been in contact with Wells, has the same parent company as Champion Labs of oil filter fame. Since I still have two modules that tested good but did not run they asked me to send them in for testing. We shall see what happens.

I do consider this important since the electronics involved are difficult for anyone to troubleshoot as the Crank sensor, Electronic Spark Control, Engine Control Module, Injectors, and assorted harnesses are all involved. Even following the six page "cranks but does not run" troubleshooting procedure in the manual often leads to conflicting results and confusing results. (when I tapped the harness pin that is supposed to rattle the injectors, the cooling fan came on...)

This is why one of my later tests is something that is not very safe - inject about a 1/2 oz of gasoline into the manifold & crank. If >nothing< happens you have no fire which means either crank sensor or ESC and not injectors or ECM.

Do not know about anyone else but it is difficult for me to lay U$145 on the counter for a non-returnable part when the super lotsa lights Wells tester says the original is good but when everything else has been eliminated...

That said I converted my '88 "C" to the later Delco ignition and it seems to run very well/is smoother than with the Magnavox but it took two "recycled" sets to come up with a good one so as soon as I have another good one will problably convert the '90 also.
padgett is offline   Reply With Quote
Old 02-28-2004, 02:49 AM   #4
Senior Member
Posts like a Camaro
 
Join Date: Jan 2003
Location: Jenison, MI (Near Grand Rapids)
Posts: 1,070
Thanks: 0
Thanked 0 Times in 0 Posts
theJMFC is on a distinguished road
Default

Thanks, Padgett, for the heads up on the Autozone tester. I can't help but wonder how accurate all of their other tests are.
theJMFC is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Spark Tester 97SEinPA General GM Chat 5 04-12-2008 07:08 PM
inexpensive fuel pressure tester? LittleHoov Lounge 10 02-10-2007 03:20 PM
Fuel pressure tester. ron350 General GM Chat 3 05-22-2006 09:56 AM
ICM Tester for Primaries BillBoost37 General GM Chat 6 05-12-2006 12:02 AM
Connection speed tester TaylorD Lounge 25 12-28-2003 08:46 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 08:05 AM.


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.