ANDYZ28

I am still sorting out some issues with my 1986 IROC-Z. It now starts a runs fine, but I now have a code 32 which is active on engine starts. I tried using the GM diagnostic flow chart but I am unable to locate the EGR diagnostic switch connector. The service manual I am using is for an '88 and the connector is not located where it indicates it on the '88 service manual.

When it starts the scan tool data indicated "EGR switch OFF" but CODE 32 still shows active.

I sure am hoping you guys can point me in the right direction.

Thanks, Andy

hdis2002

iTrader: (1)

Generally a code 32 means your egr valve isn't working correctly. It can get clogged up over time and stick open/closed. Replacements are available at most of the parts stores. It's located under the intake plenum. You might want to finish filling out your profile. It makes it easier to answer your questions when we know your cars details.

burnout88

Does the car run totally fine? But you just get a code 32 at startup or while driving?

It's very possible the EGR TEMP SENSOR is bad. The Camaro TPI version is discontinued.
GM and aftermarket. But you can use the corvette TPI one. Same part the wire is just a little shorter but it fits fine.

http://keenparts.com/news/2011/07/19...sensor-switch/

It just screws into the base of the EGR SENSOR itself. Have to take the plenum off to install.

ANDYZ28

Thanks for the info, I do as you suggest. It did not do it yesterday, kinda weird.

Thanks, Andy

Jersey89GTA

iTrader: (1)

You have an 82 w/ a carb according to your posted info -

It's gonna be different than an 88 tpi or tbi

ANDYZ28

...and I also have an '86 IROC-Z among others
;82 Z28- 383 roller w/Vortec heads Edelbrock Performer Vortec intake, Edelbrock Q jet, serpentine belt drive.TH700R4 w/B&M holeshot 2000 converter,& megashifter.1LE front brakes, 9bolt 3.27 w/1LE rear brakes.Aluminum driveshaft,boxed rear susp. poly everything, IROC swaybar+wonderbar and steering box. Spohn subframe connectors. 70mph@2200rpm ASE Master Tech plus L2
also Latest project car,'86 IROC stock 305TPI hit on left side,but not too bad ( now repaired and equipped with the 1LE brake system). Also 1990 IROCZ 5.0 TPI 5 speed (drive train has 150 miles since new), and another 1990 IROCZ 5.7 G-92 etc., and yet another 1990 IROC-Z, red w/flames, and 1988 IROC-Z convertible, red w/59,000 miles.

Jersey89GTA

iTrader: (1)

I replaced the egr valve on the bird (350 tpi) twice now. Easy test is to just pull the plenum off carefully not damage the gaskets- then test egr valve, squeeze plunger up and put finger over the vac hole, if it drops down with finger over the hole diaphragm is shot. This only works on the chevy style egrs, Pontiac are different.

If good, check solenoid, hard to find, used ones are out there for around $25. Sometimes a vac leak will be enough to cause the egr to malfunction.
Make sure vac is good, plenum bolts are torqued to 25 ft lb, Throttle body bolts torqued as well, I have found those loose at times, causing loads of havoc. Did egr on the iroc 305 also, I just put a new one in ...
New TPI and TB gaskets will help with vac issues.

With all those cars you own you probably already know this, but thought I'd share my EGR agony. MAFs are another story.

ANDYZ28

It seems to me that replacing the EGR might be a very good idea, but do the test too. The EGR is nearly 30 years old anyway.

Thanks, Andy