'90 Chevy 2500 Diagnosing Code 32 - Great Lakes 4x4. The largest offroad forum in the Midwest

Go Back   Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Chevy Tech
GL4x4 Live! GL4x4 Casino

greatlakes4x4.com is the premier Great Lakes 4x4 Forum on the internet. Registered Users do not see the above ads.
Search
Reply
 
Thread Tools Search this Thread
Old March 21st, 2007, 07:44 AM   #1
drummond
MTU 4x4
 
drummond's Avatar
 
Join Date: 11-05-05
Location: Champaign, IL
Posts: 1,406
iTrader: (0)
Mentioned: 1 Post(s)
Default '90 Chevy 2500 Diagnosing Code 32

I have a 1990 Chevy 2500 with a 350, that I use as a tow rig. Lately, it has seemed to be burning quite a bit of fuel, so I am trying to figure out what may be causing it. I replaced the fuel filter, which was quite clogged, and I checked out the O2 sensor, and it defiantely had not been replaced in forever. Seeming as the cost for those isnt that much, I just replaced them. However, when I am driving around town, the engine rarely gets above 160*. I am wondering if this may be causing the engine to run in closed loop mode, (I believe that is the term) and dumping extra gas like the choke would be on. I have learned this could be from a bad coolant temp sensor, but I am not sure. Any ideas?

Also, when I am driving over speeds of 50-55 for a time period greater than 10 minutes or so, the check engine light comes on. I jumped the pins today, and I got a code reading of the standard 12 12 12 diagnosing mode then 32 which is a CODE "32 Exhaust Gas Recirculation (EGR) Circuit". I honestly have no idea what that is, or where I could find it, or what it could do. Any help would be awesome
drummond is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old March 21st, 2007, 01:34 PM   #2
CHVYPWR
D.I.L.L.I.G.A.F.
 
CHVYPWR's Avatar
 
Join Date: 11-05-05
Location: Vicksburg, Mi.
Posts: 1,621
iTrader: (11)
Mentioned: 0 Post(s)
Default

Your going to need an EGR valve. I had that happen on a '91 Suburban I had a while back. A new EGR valve cured the code. Clean out the carbon around the ports before you put it back together.
CHVYPWR is offline   Reply With Quote
Old March 21st, 2007, 03:22 PM   #3
drummond
MTU 4x4
 
drummond's Avatar
 
Join Date: 11-05-05
Location: Champaign, IL
Posts: 1,406
iTrader: (0)
Mentioned: 1 Post(s)
Default

is that going to help with the gas mileage at all? It seems to be burning more gas than necessary...
drummond is offline   Reply With Quote
Old March 27th, 2007, 07:30 PM   #4
CHVYPWR
D.I.L.L.I.G.A.F.
 
CHVYPWR's Avatar
 
Join Date: 11-05-05
Location: Vicksburg, Mi.
Posts: 1,621
iTrader: (11)
Mentioned: 0 Post(s)
Default

Gas milage not so mich. Idle quality and overall drivability won't be that great though.
CHVYPWR is offline   Reply With Quote
Old March 30th, 2007, 12:13 AM   #5
ricdawg
Member
 
ricdawg's Avatar
 
Join Date: 04-17-06
Location: Elkhart Lake, WI
Posts: 44
iTrader: (0)
Mentioned: 0 Post(s)
Default

Sounds like you have two problems. The EGR valve which probably needs to be replaced and the engine temp. Youíre correct that the engine needs to be at full operating temperature (190 degrees +) for the computer to take control and lean out the fuel mixture. It could be something as simple as the engine thermostat itself or a coolant sensor. The coolant sensor for the gauge is a different sensor than the one for the computer. I would bring it up to operating temperature and then check the coolant temperature with a known good mechanical temperature gauge. If itís not around 190 degrees, replace the thermostat.

Rick
ricdawg is offline   Reply With Quote
Reply
Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Chevy Tech

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

Forum Jump


All times are GMT -5. The time now is 12:22 PM.


Powered by: vBulletin, Copyright ©2000 - 2012, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Page generated in 0.10188 seconds with 35 queries