Code 32 on '87 TBI - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**nlped** · 09-10-2009, 02:24 PM

Okay, I tend to think I am pretty handy, but I'm a little stumped. I recently fixed a code 22 (TPS low voltage) by replacing the plug, which was cracked and brittle, and the actual TPS. It quit throwing any codes for about 2 1/2 weeks and then all of a sudden last night I got a check engine light. Checked it, and it is a code 32 (EGR). Okay, so a little investigation and I first realize that the vacuum source on the front of the TBI for the EGR is plugged. But after a few looks around the ole' intake manifold, there is no EGR valve. There's a location for one on the passenger side just right/rear of the TBI, but it has a block off plate in it's place. What should I do know?

STOCKISH · 09-10-2009, 08:20 PM

Have an aftermarket performance shop re-flash your ecm to not monitor EGR. Or if all else fails, replace the block off with an EGR valve.

cjracing15 · 09-10-2009, 08:21 PM

I agree!

clinebarger · 09-10-2009, 09:08 PM

The ECM does not moniter the EGR valve. The ECM controls the EGR vacuum soleniod. all the ECM looks for is voltage feedback from the solenoid. so as long as the wires to the solenoid are good ( Ignitoin hot wire and the wire to the ECM ) and the coil isnt bad in the solenoid. No EGR code. Regardless of vacuum or the EGR valve not being there TBI computers moniter few curcuits.

**nlped** · 09-11-2009, 07:24 AM

Okay, so where is the EGR solenoid and what color are the wires that go to it. It's suppose to be on that bracket on the right side of the TBI, correct? It ain't there, so where else could it be, & if it isn't there, I will have to hunt down the wires in the harness and replace the plug and put a new solenoid on...right?

Thanks Clinebarger!

STOCKISH · 09-11-2009, 07:56 AM

OK, I apologise, have them re-flash to not monitor the EGR "circuit". I guess I should have been more specific.

clinebarger · 09-11-2009, 10:40 PM

The wire colors should be gray & pink (pink-Ignition hot, gray To ECM pin A4)
heres some drawing i have. 1972supercheyenne TBI ECMs are not "flashed"they use a removable PROM (Programable read only memory) that whould have to be "burned". later model ECMs use a flash memory
EEPROM (Electronic Erasable Read Only Memory)

clinebarger · 09-11-2009, 10:42 PM

I hope they load this time

**nlped** · 09-13-2009, 07:18 PM

Thanks again, Clinebarger for the drawings. That should help me solve my latest issue. I'm not going to do any kind of reprogramming as I plan to put a 5.3 out of an '05 this winter, but I want the motor running right so I can possibly use it in another project later on.

Cheers,

Ed

clinebarger · 09-13-2009, 07:45 PM

Quote:

Originally Posted by nlped

Thanks again, Clinebarger for the drawings. That should help me solve my latest issue. I'm not going to do any kind of reprogramming as I plan to put a 5.3 out of an '05 this winter, but I want the motor running right so I can possibly use it in another project later on.

Cheers,

Ed

If you need help on the 5.3 let me know. I have a lot more genIII info than TBI stuff.

**nlped** · 09-14-2009, 12:36 AM

Cool...Thanks! I am planning on mirroring Glocks stuff....I hope

09-10-2009, 02:24 PM	#1
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,148	Code 32 on '87 TBI Okay, I tend to think I am pretty handy, but I'm a little stumped. I recently fixed a code 22 (TPS low voltage) by replacing the plug, which was cracked and brittle, and the actual TPS. It quit throwing any codes for about 2 1/2 weeks and then all of a sudden last night I got a check engine light. Checked it, and it is a code 32 (EGR). Okay, so a little investigation and I first realize that the vacuum source on the front of the TBI for the EGR is plugged. But after a few looks around the ole' intake manifold, there is no EGR valve. There's a location for one on the passenger side just right/rear of the TBI, but it has a block off plate in it's place. What should I do know? __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha

09-10-2009, 08:20 PM	#2
STOCKISH Formerly- 1972SuperCheyenne Join Date: Oct 2008 Location: Wake Forest NC Posts: 5,782	Re: Code 32 on '87 TBI Have an aftermarket performance shop re-flash your ecm to not monitor EGR. Or if all else fails, replace the block off with an EGR valve. __________________ --Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with.

09-10-2009, 08:21 PM	#3
cjracing15 Registered User Join Date: Jan 2007 Location: Lexington, TN Posts: 1,427	Re: Code 32 on '87 TBI I agree! __________________ The fleet 94 Chevy 4x4 reg cab 2018 Traverse (wifes car) 1977 SWB stepside 1949 Chevy truck

09-10-2009, 09:08 PM	#4
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: Code 32 on '87 TBI The ECM does not moniter the EGR valve. The ECM controls the EGR vacuum soleniod. all the ECM looks for is voltage feedback from the solenoid. so as long as the wires to the solenoid are good ( Ignitoin hot wire and the wire to the ECM ) and the coil isnt bad in the solenoid. No EGR code. Regardless of vacuum or the EGR valve not being there TBI computers moniter few curcuits.

09-11-2009, 07:24 AM	#5
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,148	Re: Code 32 on '87 TBI Okay, so where is the EGR solenoid and what color are the wires that go to it. It's suppose to be on that bracket on the right side of the TBI, correct? It ain't there, so where else could it be, & if it isn't there, I will have to hunt down the wires in the harness and replace the plug and put a new solenoid on...right? Thanks Clinebarger! __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha

09-11-2009, 07:56 AM	#6
STOCKISH Formerly- 1972SuperCheyenne Join Date: Oct 2008 Location: Wake Forest NC Posts: 5,782	Re: Code 32 on '87 TBI OK, I apologise, have them re-flash to not monitor the EGR "circuit". I guess I should have been more specific. __________________ --Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with.

09-11-2009, 10:40 PM	#7
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: Code 32 on '87 TBI The wire colors should be gray & pink (pink-Ignition hot, gray To ECM pin A4) heres some drawing i have. 1972supercheyenne TBI ECMs are not "flashed"they use a removable PROM (Programable read only memory) that whould have to be "burned". later model ECMs use a flash memory EEPROM (Electronic Erasable Read Only Memory)

09-11-2009, 10:42 PM	#8
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: Code 32 on '87 TBI I hope they load this time Attached Images

09-13-2009, 07:18 PM	#9
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,148	Re: Code 32 on '87 TBI Thanks again, Clinebarger for the drawings. That should help me solve my latest issue. I'm not going to do any kind of reprogramming as I plan to put a 5.3 out of an '05 this winter, but I want the motor running right so I can possibly use it in another project later on. Cheers, Ed __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha

09-14-2009, 12:36 AM	#11
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,148	Re: Code 32 on '87 TBI Cool...Thanks! I am planning on mirroring Glocks stuff....I hope __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha



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