Engine dies once operating temp is reached. - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old Mar 1st, 01, 09:40 AM Thread Starter
 
Join Date: Feb 2001
Posts: 4
Question

I have a 1987 IROC Z28 with 305 TPI w/ 5 speed. Mild mods include K&N filters, TPIS Airfoil, screen removed from MAS, Flowmaster cat-back, Accel cap, rotor and plugs, BlueMax wires, 160 degree thermo, dual electric fans with new relays and sensors. The engine will start and run fine until the temp get to a normal operating level. The engine then dies and will not start again until it has had time to cool. The engine doesn't seem to be overheating. Could this be a starter or coil problem or something totaly different. Any help will be appreciated.

[This message has been edited by Raven87 (edited 03-01-2001).]
Raven87 is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old Mar 1st, 01, 03:28 PM
Moderator
David Pozzi
 
davidpozzi's Avatar
 
Join Date: Nov 1999
Location: Central California, USA
Posts: 10,074
Post

I'd run it until it quits, then check for spark by putting an old spark plug into one of the wires, lay it on the engine with a good ground and crank it over.

I'd suspect a bad ign module, they can fail when they get warm. It might be a cracked connection inside the module, when it heats up the crack separates.
David

------------------
Check my web page for First Gen Camaro suspension info:
David's Motorsports page
First Gen Suspension Page
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Can Am Vintage Racer
davidpozzi is offline  
post #3 of 9 (permalink) Old Mar 2nd, 01, 02:06 AM Thread Starter
 
Join Date: Feb 2001
Posts: 4
Exclamation

Thanks for the input David. I'll try that and let you know. If it turns out to be the problem then this will make the third module in two yrs.
Raven87 is offline  
 
post #4 of 9 (permalink) Old Mar 2nd, 01, 05:50 AM
Senior Tech
 
Join Date: Nov 1999
Location: West Richland, Wa. USA
Posts: 175
Post

I agree with Dave. The module is the best starting point. Sounds to be electronic in nature. I am not sure but you maybe able to read codes from the computer. As cars get more and more technology it becomes harder to find problems. If it is not the module and you can not read any codes start thinking of things heat would affect, other sensors (temperature [sometimes these are not only in the block but in the radiator/overflow tanks], TBI/injection, choke, amps/voltage sometmes can be the problem [alternator may work cold but when it heats up low/no amps/voltage]) lots of options. I do not think it would be a starter unless the wiring to the starter is somehow mesing things up.
1st & 2nd GENGuy is offline  
post #5 of 9 (permalink) Old Mar 2nd, 01, 11:20 AM
Moderator
David Pozzi
 
davidpozzi's Avatar
 
Join Date: Nov 1999
Location: Central California, USA
Posts: 10,074
Post

If it is the module, check for bad plug wires which can cause arcing to the module inside the distributor cap which will blow the module.
Normally that would just blow the module, and it wouldn't start after that.
It might also be the pickup coil which has very small hair like wire in it that can break.
You test it with an ohm meter and it should be a specified resistance. I'd check it hot when the engine quits if there is no spark.
David

------------------
Check my web page for First Gen Camaro suspension info:
David's Motorsports page
First Gen Suspension Page
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Can Am Vintage Racer
davidpozzi is offline  
post #6 of 9 (permalink) Old Mar 3rd, 01, 06:45 PM
Senior Tech
Dale
 
Join Date: Sep 2000
Location: Glendale,AZ.U.S.A.
Posts: 966
Post

If you find another bad module,throw in a new coil.Check the coil for white spots next to the steel lamination.

------------------
68 z28 ,68 rs 327 ,73 454 vette, 2 goofy kids
dale68z is offline  
post #7 of 9 (permalink) Old Mar 4th, 01, 11:04 AM
 
Join Date: Mar 2001
Location: durhamville,ny,us
Posts: 26
Post

lets not forget about the ecm[computer] i've seen alot of those cause seemingly hot no start conditions,if your spark search doesnt turn up any results,throw the ecm in the freezer for a couple of minutes and see if it starts.
tom billings is offline  
post #8 of 9 (permalink) Old Mar 4th, 01, 01:56 PM Thread Starter
 
Join Date: Feb 2001
Posts: 4
Thumbs up

David, I tried your idea and yes it was the module. It looks like the last time I had it in they decided to use a module from Hong Kong. I guess it wasn't up to the heat. I replaced it with an USA made performance module. Works fine now. Thanks for all of the suggestions everyone.
Paul
Raven87 is offline  
post #9 of 9 (permalink) Old Mar 4th, 01, 07:50 PM
Moderator
David Pozzi
 
davidpozzi's Avatar
 
Join Date: Nov 1999
Location: Central California, USA
Posts: 10,074
Post

Thanks for coming back and letting us know.
Make sure you used the heat sink liquid gel on the base for cooling.
David

------------------
Check my web page for First Gen Camaro suspension info:
David's Motorsports page
First Gen Suspension Page
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Can Am Vintage Racer
davidpozzi is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome