EGR switch
Thread Starter
Le Mans Master
Joined: Jul 2004
Posts: 6,221
Likes: 697
From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
EGR switch
Was recommended that I replace the EGR switch. Does my 85 L98 have one? All I can find is the EGR and the EGR solenoid. Is the solenoid the switch?
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
Not by my 87, and when I had an EGR code it turned out to be the switch, a little gizmo toward the back of the engine on the passenger side..close to the dist. or EGR pipe. Worked for me. 
cheap too.
cheap too.
Melting Slicks
Joined: Apr 2002
Posts: 2,118
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From: St. Charles, MO Route 66 Corvette Club
Just going from memory on my 89 (and this is dangerous for me), the EGR switch is located just about #8 cylinder on the EGR tube. The EGR solenoid is located on the thermostat housing. It is located on a sheet metal holding device that is held in place by one of the thermostat housing bolts. I am right sometimes......and wrong other times
Drifting
Joined: May 1999
Posts: 1,478
Likes: 3
From: Sacramento, CA Money can't buy happiness - but it's more comfortable to cry in a Corvette than a Yugo.
Originally Posted by rick lambert
Not by my 87, and when I had an EGR code it turned out to be the switch, a little gizmo toward the back of the engine on the passenger side..close to the dist. or EGR pipe. Worked for me. cheap too.
cheap too.
Originally Posted by Sam Lam
Just going from memory on my 89 (and this is dangerous for me), the EGR switch is located just about #8 cylinder on the EGR tube. The EGR solenoid is located on the thermostat housing. It is located on a sheet metal holding device that is held in place by one of the thermostat housing bolts. I am right sometimes......and wrong other times
Joslinm, the original GM part # for your 85 EGR switch was #14087416. You should be able to order it on-line and install it yourself for much less than a dealer or shop would charge. The 86-89 EGR switch part # was #14087415. I checked two different GM Dealer Parts Guides and both show the 85 having the part number ending in ...16 and the 86-89 having the part # ending in ...15. Be sure that you get the correct part.
Intermediate
Joined: Aug 2005
Posts: 28
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From: fargo nd
the egr on an '85 is mounted in the base of the egr valve, under the plenum. I don't know if you need to remove the plenum or not to get to that bugger. This is the next project on my '85, but i'm going to remove the plenum and pull the egr for inspection and cleaning.
Team Owner
Joined: May 2006
Posts: 21,473
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From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
I was skimming through my MidAmerica catalog and on page 35 of the actual catalog it shows the EGR switch and what it looks like(a picture always helps) It is listed as EGR Switch for 85-89 for Trouble Code 32 most common fix for this trouble code.
You can look at their site and view the picture as well! at www.madvet.com
Thanks, Matt
You can look at their site and view the picture as well! at www.madvet.com
Thanks, Matt
Drifting
Joined: May 1999
Posts: 1,478
Likes: 3
From: Sacramento, CA Money can't buy happiness - but it's more comfortable to cry in a Corvette than a Yugo.
I looked at the MidAmerica picture of the 85-89 EGR switch. http://www.madvet.com/shop?frame=3.911 I believe that it is in error. The 86-89 all used that setup, but 85 was different. The 85 may be able to use the 86 and later switch, but that is not what my GM Dealer Parts Guide says.
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Thread Starter
Le Mans Master
Joined: Jul 2004
Posts: 6,221
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From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
Originally Posted by Mike_88Z51
I looked at the MidAmerica picture of the 85-89 EGR switch. http://www.madvet.com/shop?frame=3.911 I believe that it is in error. The 86-89 all used that setup, but 85 was different. The 85 may be able to use the 86 and later switch, but that is not what my GM Dealer Parts Guide says.
Pro
Joined: Mar 1999
Posts: 678
Likes: 0
From: Oslo, Norway
Hi.
There is an EGR thermoswitch just in front of the EGR valve under the Plenum. I had EGR codes and I changed the EGR valve as the vacuum membrane was bad Did not hold vacuum. Then I had intermittent EGR codes and it was the EGR thermo switch. a little device with a cable on it. It is a bimetal switch to sense if there is exhaust in the EGR system. The EGR sequence you will find in the workshop manual.
There is an EGR thermoswitch just in front of the EGR valve under the Plenum. I had EGR codes and I changed the EGR valve as the vacuum membrane was bad Did not hold vacuum. Then I had intermittent EGR codes and it was the EGR thermo switch. a little device with a cable on it. It is a bimetal switch to sense if there is exhaust in the EGR system. The EGR sequence you will find in the workshop manual.
Thread Starter
Le Mans Master
Joined: Jul 2004
Posts: 6,221
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From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
Just ordered from Advance Auto. They don't call it a switch though. See link. Supposed to be the same as item #14087416 as indicated on previous post. Called an Exhaust Temp Sensor. Hope I ordered the right thing.
http://www.partsamerica.com/ProductD...tnumber=779301
http://www.partsamerica.com/ProductD...tnumber=779301
Drifting
Joined: May 1999
Posts: 1,478
Likes: 3
From: Sacramento, CA Money can't buy happiness - but it's more comfortable to cry in a Corvette than a Yugo.
Originally Posted by Benny42
Hi.
Either switch will work fine. The diffrence is the length of the wire, nothing else. I'm running a camaro switch cuz it was in stock, vette switch was
order it and wait.
Either switch will work fine. The diffrence is the length of the wire, nothing else. I'm running a camaro switch cuz it was in stock, vette switch was
order it and wait.
Joslinm, if Benny42 is correct that the switch is the same except the length, then you probably have the right part. The ends on the switch in your link match the ends on my switch that I just replaced.
Drifting
Joined: Feb 2006
Posts: 1,423
Likes: 96
From: Magnolia Tx
egr switchs
Hi. The camaro switch as i called it is the longer length of the two switches. It is about 8" longer than the alum. head vette style switch.
'85 switch will fit later, later switch is too short for '85. Sorry if i was vague before.
'85 switch will fit later, later switch is too short for '85. Sorry if i was vague before.
Drifting
Joined: May 1999
Posts: 1,478
Likes: 3
From: Sacramento, CA Money can't buy happiness - but it's more comfortable to cry in a Corvette than a Yugo.
Originally Posted by Benny42
Hi. The camaro switch as i called it is the longer length of the two switches. It is about 8" longer than the alum. head vette style switch.
'85 switch will fit later, later switch is too short for '85. Sorry if i was vague before.
'85 switch will fit later, later switch is too short for '85. Sorry if i was vague before.
Thread Starter
Le Mans Master
Joined: Jul 2004
Posts: 6,221
Likes: 697
From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
Got my Exhaust Temperature Sensor (AKA EGR SWITCH) today and installed. Only took an hour. Getting too much practice taking the plenum off I guess. Started and drove for a few minutes and no codes. Time will tell. Hopefully better MPG too.
