Search | Car Forums | Gallery | Articles | Helper | AF 350Z | IgorSushko.com | Corporate |
| Latest | 0 Rplys |
|
Show Printable Version | Email this Page | Subscribe to this Thread |
|
Thread Tools |
03-21-2008, 12:58 PM | #1 | |
AF Newbie
Join Date: Jan 2007
Location: indpls, Indiana
Posts: 24
Thanks: 0
Thanked 0 Times in 0 Posts
|
'91 Sonoma Temp Gauge flucuations?
My temp gauge on my Sonoma flucuates wildly. Immediately after startup, it goes all the way to the top turning on the check gauges light. Then it will drop to normal seconds or minI know it is not hot, it sat all night in 30 degree weather. I changed the coolant temp. sending unit and it still does it. Can't think of what it is, any suggestions?
|
|
03-21-2008, 06:15 PM | #2 | |
Advisor/Moderator
Join Date: Nov 2005
Location: Belleville, Michigan
Posts: 5,184
Thanks: 6
Thanked 103 Times in 95 Posts
|
Re: '91 Sonoma Temp Gauge flucuations?
What engine?
|
|
03-22-2008, 11:09 AM | #3 | |
AF Newbie
Thread starter
Join Date: Jan 2007
Location: indpls, Indiana
Posts: 24
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: '91 Sonoma Temp Gauge flucuations?
4.3l
|
|
03-22-2008, 11:31 AM | #4 | |
Advisor/Moderator
Join Date: Nov 2005
Location: Belleville, Michigan
Posts: 5,184
Thanks: 6
Thanked 103 Times in 95 Posts
|
Re: '91 Sonoma Temp Gauge flucuations?
1991 4.3L has two temperature sensors. The sensor in the intake manifold near the thermostat is for the computer controls, (OBDI). The sensor in the cylinder head, most likely driver side between the spark plugs, is for the dash gauge. Gauge fluctuations can be caused by several things. If it happens when the engine is cold, as you indicated, it's probably not coolant temperature related but rather electrical. It could be a loose connection or a poor ground. The system is designed to indicate HOT when there's an open circuit. Check it out and post your results.
|
|
03-23-2008, 07:44 AM | #5 | |
AF Newbie
Thread starter
Join Date: Jan 2007
Location: indpls, Indiana
Posts: 24
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: '91 Sonoma Temp Gauge flucuations?
Will do, thanks for the reply
|
|
04-06-2008, 11:09 AM | #6 | |
AF Newbie
Thread starter
Join Date: Jan 2007
Location: indpls, Indiana
Posts: 24
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: '91 Sonoma Temp Gauge flucuations?
Every since your reply, never got the chance to look at the truck again, but it has stop fluctuating. I will leave well enough alone till it does it again. Thanks for your help
|
|
|
POST REPLY TO THIS THREAD |
|
|