1988 Chevy Celebrity cooling fan runs, doesnt idle well in

Tiny
MADDOG08
  • MEMBER
  • 1988 CHEVROLET CELEBRITY
Engine Performance problem
1988 Chevy Celebrity 6 cyl Front Wheel Drive Automatic

engine fan seems to run almost constanly, car doesnt want to idle well when first started now that the weather is cold
Do you
have the same problem?
Yes
No
Tuesday, October 21st, 2008 AT 7:05 PM

5 Replies

Tiny
MASTERTECHTIM
  • MEMBER
First replace the engine coolant temp sensor for the ecm. Its located by the thermostat housing. I bet its reading too high causing your fan to run because it thinks the car is hot and also its making it run lean when its cold because it always thinks the engine is warm. The sensor has 2 wires going to it. I believe its a brown and a yellow wire. The part should cost less that 20 bucks. Hope this helps
Was this
answer
helpful?
Yes
No
Tuesday, October 21st, 2008 AT 7:13 PM
Tiny
MADDOG08
  • MEMBER
I did replace the engine coolant temp sensor. Fan still want to run all the time
Was this
answer
helpful?
Yes
No
Wednesday, October 22nd, 2008 AT 7:16 PM
Tiny
MASTERTECHTIM
  • MEMBER
Well unfortunately we need to install a scan tool at this time to actually see what the computer is seeing to find out if its a wiring problem or a computer problem. Is the check engine light on? Do you know the codes?
Was this
answer
helpful?
Yes
No
Wednesday, October 22nd, 2008 AT 8:37 PM
Tiny
MADDOG08
  • MEMBER
The service engine light did come on today briefly, before the car stalled. Checked the codes, code 63 was stored. P.S. The TCC is unpluged, don't know what issues this may cause.
Was this
answer
helpful?
Yes
No
Monday, October 27th, 2008 AT 7:11 PM
Tiny
MASTERTECHTIM
  • MEMBER
Tcc being unplugged wont cause any issues that im aware of. The code 63 is map sensor voltage high which can be set from losing spark or fuel. There are so many things that could cause this to happen. Im leaning towards the ecm (engine control module) I cant tell you how many I have replaced. If the ecm is reading the correct engine temp and commands fans on is a good clue that its bad and plus the code 63 is another clue ecm is bad.
Was this
answer
helpful?
Yes
No
Monday, October 27th, 2008 AT 7:25 PM

Please login or register to post a reply.

Recommended Guides