SES codes on an 86.
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 3,524
Likes: 1
From: Pinellas Florida Misfit
Cruise-In III Veteran
Hey everyone,
I was out on a long drive today in my 86 and about 2 hours into the trip, my SES light came on. After I got to my destination and let the car sit for a couple hours, it went off until the way home... came back on and now its staying on. I pulled the codes and got a 32 and 34. I think 32 is EGR but unsure about 34... I did add an open air filter lid and a K&N air filter before I set out on the trip.
Are either of these codes harmful and is there a way to rest the ECM to see which codes come back? The car seems to be running great, just the annoying light.
On a side note... is ANYTHING in these cars easy to get at?? The tail light bulb looks as its going to be a chore from hell to replace!
Thanks
Jim
I was out on a long drive today in my 86 and about 2 hours into the trip, my SES light came on. After I got to my destination and let the car sit for a couple hours, it went off until the way home... came back on and now its staying on. I pulled the codes and got a 32 and 34. I think 32 is EGR but unsure about 34... I did add an open air filter lid and a K&N air filter before I set out on the trip.
Are either of these codes harmful and is there a way to rest the ECM to see which codes come back? The car seems to be running great, just the annoying light.
On a side note... is ANYTHING in these cars easy to get at?? The tail light bulb looks as its going to be a chore from hell to replace!
Thanks
Jim
Drifting
Joined: Mar 2001
Posts: 1,636
Likes: 3
From: Lafayette IN
Originally Posted by two-tone86:
[B
[B
Are either of these codes harmful and is there a way to rest the ECM to see which codes come back? The car seems to be running great, just the annoying light.
[/B][/color]
[/B][/color]
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:[/color]<HR><font face="Verdana, Arial" size="2">
On a side note... is ANYTHING in these cars easy to get at??[/color][/QUOTE]
'bout the only thing I've found so far is the sunvisor...but still, the roof needs to be off for that [img]http]//www.corvetteforum.cc/ubb/biggrin.gif[/img] Good luck, -Matt-
Burning Brakes
Joined: May 2000
Posts: 1,181
Likes: 0
From: Puyallup Washington
My 86 was doing that! It was the EGR temperature switch. It's located in the top of the EGR tube that goes over the right valve cover. I think it was $12.00 at a GM dealer. It would only come on after 10 or 15 minutes of driving over 45 mph.
It's a ceaply made switch, and easily replaceable, the wire connector is hard to reach though. Much easier with the distributor cap removed.
It's a ceaply made switch, and easily replaceable, the wire connector is hard to reach though. Much easier with the distributor cap removed.
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 3,524
Likes: 1
From: Pinellas Florida Misfit
Cruise-In III Veteran
Ok, I reset the ECM by pulling the neg battery cable, let it sit off for a few minutes and restarted the car. It still threw the code 34 almost instantly.
looks as if 34 is a MAF code... a few articles on here referes to relays for these.. does anyone know where they are located and a GM part number?
[This message has been edited by two-tone86 (edited 07-29-2001).]
looks as if 34 is a MAF code... a few articles on here referes to relays for these.. does anyone know where they are located and a GM part number?
[This message has been edited by two-tone86 (edited 07-29-2001).]
Burning Brakes
Joined: May 2000
Posts: 1,181
Likes: 0
From: Puyallup Washington
They are located behind the battery on the firewall. I also had trouble with them, they should be replaced as a set. In my case it was an intermitent rough running condition. It was cured with replacement of the MAF power and burn off relays. I don't remember how much they cost,but it was not expensive.
The part numbers have changed several times, so a check of the latest numbers may be needed.
The part numbers have changed several times, so a check of the latest numbers may be needed.
Pro
Joined: Jun 2000
Posts: 686
Likes: 0
From: Crystal Lake, IL USA
The '86 takes two different relays, the burnoff relay is 10094701 and the power relay is 10067925. These were taken from TSB 87-270 - the parts manual may not have the right numbers listed, or only a single number which can cause a whole separate set of problems from what I've heard.
is ANYTHING in these cars easy to get at??
The alternator, for obvious reasons.
I have never seen a two-tone '86 - when can you get a picure up?
is ANYTHING in these cars easy to get at??
The alternator, for obvious reasons.
I have never seen a two-tone '86 - when can you get a picure up?
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 3,524
Likes: 1
From: Pinellas Florida Misfit
Cruise-In III Veteran
Thanks everyone. I've got the car in the shop having other work done (Water pump, yay.. wish I had my own garage!) and had them through a diag on it.. they said the MAF itself is bad, but I'm not buying that yet... I'll put the relays in 1st.
I have pictures sitting on the camera, just need to get them developed.
I have pictures sitting on the camera, just need to get them developed.
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 3,524
Likes: 1
From: Pinellas Florida Misfit
Cruise-In III Veteran
Ok, got the car back from the shop and did some investgating on the MAF problem... one of the wires in the center of the MAF is broken, so it does need to be replaced. I picked up the 2 relays just because and I noticed the 2 I have now are both indeed the same part number. I'm going to swap them out when I pick up the MAF, but one stupid question.. which plug is the burn and which is power?
Also.. where is a reasonable place to get the MAF from?
Thanks!
Jim
Also.. where is a reasonable place to get the MAF from?
Thanks!
Jim
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Pro
Joined: Jun 2000
Posts: 686
Likes: 0
From: Crystal Lake, IL USA
which plug is the burn and which is power
My helms manual shows the location on the firewall behind the battery but labels both as "burn off" relays. No help there. I looked at the relays on my car. I could only get a number off the one parallel to the firewall 14078907 - not one of the choices unless the original number has been superceded.
One way to tell is with a voltmeter. "B" is always grounded on the power relay, but not on the burnoff relay unless it is in a burnoff cycle. "C" is always 12v on the burnoff relay, but only when the fuel pump is running on the power relay.
There may be something with the wire colors, too.
I have the pair of relays on order, so I need to know also. If you find out for certain, please get back to me.
The best pricing and service on genuine GM parts is through Jeff Kopp at Superior Chevrolet 800-728-8267
My helms manual shows the location on the firewall behind the battery but labels both as "burn off" relays. No help there. I looked at the relays on my car. I could only get a number off the one parallel to the firewall 14078907 - not one of the choices unless the original number has been superceded.
One way to tell is with a voltmeter. "B" is always grounded on the power relay, but not on the burnoff relay unless it is in a burnoff cycle. "C" is always 12v on the burnoff relay, but only when the fuel pump is running on the power relay.
There may be something with the wire colors, too.
I have the pair of relays on order, so I need to know also. If you find out for certain, please get back to me.
The best pricing and service on genuine GM parts is through Jeff Kopp at Superior Chevrolet 800-728-8267