Ok, I read all the articles on the EGR valve and it's purpose. I recently posted a question on the TBI section with no response.
https://www.thirdgen.org/messageforu...ML/000081.html

When I changed my 305 TBI motor to a 300hp 350 with Holley 670 TB I put a new MAP, EGR valve and solenoid on at the same time and a new 350 knock sensor. I also change the plastic vacumn lines to rubber. I have been getting the 32 code for 4 years now and after the first year gave up on trying to find the problem. It only comes on if I am in 5th gear. Around town it never comes on. The more miles i get on the engine the less the light seems to come on and occassionaly it will go off while I'm still cruising down the road. Could these problems be linked to my cam and the different amount of vacumn it produces than what a TBI computer needs? I heard that a TBI computer needs more vacumn than a TPI computer? Or could it be my stock intake manifold causing the problem. I throughly cleaned the intake when it was off so everything was clean when I installed the motor. My exhaust is high flowing also, does backpressure affect the EGR valve?

Here's my new problem. I'm in the process of installing a Holley Projection intake and Holley claims the EGR valve required for this intake is from a 1978 Chevy 350 truck engine (which no one in town has in stock). There are also 4 valves listed for the 1978 350 Truck engine. My question is how is these EGR valves going to work with my 1988 TBI computer? I have yet to figure out which one will even fit on the manifold but even if I do find one what kind of problems (if any) will I run into using this EGR valve that was designed for a low hp, carbed 350 engine compared to my 300hp 350 TBI engine? The cam I have is the LT1 cam. What it hurt me to just block off the EGR valve. I tried this recently by plugging the valve and the solenoid but still got the 32 code as normal and noticed no change in performance than I did before. I may have even lost some gas mileage but not for certain. I would rather keep the EGR and have no 32 code!

Any help would be greatly appreciated!!

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1988 TA 300+hp 350 w/ TBI and Holley TB unit,
WC T-5, 3.42 gears w/ Auburn posi. MSD 6A, edelbrock TES headers, dynomax 3" cat and cat-back system, ACCEL coil, polyurethane bushings all around, aluminum driveshaft, Mr. Gasket open air cleaner.

1993 S-10 w/ 4.3L V6 TBI, slightly bigger cam, Mild polish job and 3 angle valve job on heads, Edlebrock TES headers, Dynomax cat back, MSD 6A, ADS chip
(bought from my dad)

2000 GMC Sierra Regular Cab Stepside
285hp 5.3L w/ 3.42 gears and locking diff. (sold to my dad..no!!)

 

I get the same thing to, I mean I have the same exact problem, it has done it since I got the car. So you are not alone.

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86Z28, GM 350, Jet perf Q-jet & chip Dual snorkel air cleaner, Edelbrock performer intake, Edelbrock headers, Edelbrock cat-back, Off road pipe, MSD 6AL, Accel Super Coil, Moroso Blue max wires, Rapid fire plugs, Jet fan switch, World class t-5, Hurst Short Throw Shifter, Ram Flywheel, Center force dual friction clutch,Aluminum drive shaft, BW disc rear 3.45's & a posi, PBR calipers, Earls braided brake lines, Polygrapite bushings all the way around, poly tranny mount & torque arm mount, Hotchkis lower control arms & panhard rod, Rancho limiter straps, KYB struts & shocks, Gm Wonderbar, Edelbrock strut tower brace, SSM sub frame connectors, Jamex lowering springs, Carbon metallic brake pads, Crossed drilled rotors, Mobil 1 Tranny fluid & motor oil, GM syntheic rear end oil, K&N, Grant stering wheel, 1,200 watt system, Jet Black Paint, 91 Z28 rims, 92 wing, Tinted windows.

 

at least I know I'm not alone...thanks! Anyone else, I know someone has to have some useful knowledge to help me out here.


[This message has been edited by badbird88 (edited September 27, 2000).]