1990 egr problem???

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Jun 22, 2005 | 01:00 PM

bertg

Thread Starter

4th Gear

Joined: Jun 2005

Posts: 4

Likes: 0

From: Somerset MA

1990 egr problem???

have a 90 vette and am having a problem with the electronics,get an error code 43 on scan and 42 on the cpu replaced EGR and module but still having the problem KNOW ANYONE THAT HAS THE FIX OR AT LEAST WHAT TO LOOK FOR NOW?
A SLOW REAL SLOW VETTE RIGHT NOW
ALL HELP WILL BE APPRECIATED.
THANKS ALL

Jun 22, 2005 | 02:20 PM

1986coupe

Burning Brakes

Joined: Jun 2003

Posts: 1,079

Likes: 1

From: Niagara Falls ON

These codes are not for EGR. I don't have my list with me but 43 and 42 usually deal with the TPS.

Jun 22, 2005 | 02:48 PM

Steel Blue 91

Le Mans Master

Joined: Jul 2002

Posts: 5,818

Likes: 2

From: Alive and well in Burlington NC

Code 42 is the EST (?) circuit. It will set if you disconnect the single lead connector to set base timing (should be taped outside the harness in the brake booster area).
Code 43 is the knock sensor circuit. Could be a shorted lead or bad sensor.

Jun 22, 2005 | 03:21 PM

AGENT 86

Team Owner

Joined: Jan 2003

Posts: 20,316

Likes: 246

From: Summerland B.C. Canada

From my 86 manual, but may help

http://members.shaw.ca/corvette86/Code%2042.pdf
http://members.shaw.ca/corvette86/Code%2043.pdf

Jun 22, 2005 | 04:48 PM

skateparkdave

Melting Slicks

Joined: May 2004

Posts: 2,524

Likes: 10

From: Lufkin Texas

St. Jude Donor '05-'06

With the others. Code 32 is the EGR circuit code.

Wanna sell your new EGR parts cheap??

Just kidding, but I did get a code 32 last week, but it had no effect on performance. I did nothing but clear code and it hasn't returned.

Jun 22, 2005 | 05:35 PM

bertg

Thread Starter

4th Gear

Joined: Jun 2005

Posts: 4

Likes: 0

From: Somerset MA

thanks, not being a mechanic I have to research and on the hand held scanner they told me it was an EGR problem, but the found some module in distributor and some other thing that they had to pull the shaft and reinstall so it worked so far, let's see later tonight if it keeps on working. Thanks to you and all responders for the help.BJG

Jun 22, 2005 | 05:37 PM

bertg

Thread Starter

4th Gear

Joined: Jun 2005

Posts: 4

Likes: 0

From: Somerset MA

thanks will read and evaluate as I am not a mechanic. Thanks for the effort let's see if she runs for another day.

Jun 23, 2005 | 11:20 AM

bertg

Thread Starter

4th Gear

Joined: Jun 2005

Posts: 4

Likes: 0

From: Somerset MA

OK you were all right

finding out the right meanings of the codes was made possible by all the feedback you all gave.It turned out to be the pickup module on the dist was real bad had no coating left and was shorting out, was replaced and reset and all is running great (right now)
Thanks one and all for your help.
BJG