Ok I know that my EGR valve is bad or maybe even gone. I dont know which one. But I was wondering, Ive heard that the EGR valve is code 32? And I also heard that is takes away on your performance quite abit. I havent replaced my EGR cause it cost $300 I think. But I need to know where it takes away at the performance (like at the 1,500 to 3,000 rpm range or like 4,500 to 5,500) basically does it take away more at the torque or horsepower?

 

The EGR should not adversly affect the power of the engine to a noticable degree when the EGR system is functioning correctly. Basically the computer commands the EGR circuit only during specific times, such as cruising down the highway. This way the computer can monitor the affect the EGR has on the exhaust content. Also the EGR should never be activated at idle or you will have poor idle quality. If you live in an emissions county just be sure it is installed and functioning correctly and you will never know that it is there.

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"84Z28/'91 305TPI comp cam flowmaster TB coolant bypass/shutoff valve to heater core MAT relocated Ram-Air(home-made) gutted air-box IROC ground effects/wheels GY245/50's 700R4 superior shift kit/ corvette servo(excellent shift kit BTW) Rebuilt engine and transplanted it myself. Love this engine!
LOW performance people should drive low performance vehicles!

 

Monkie,

In addition, a little EGR gas helps keep the combustion process cooler, so you will avoid the hot spots in the chambers and may be able to get away with a bit more base timing advance. Since the heads will be cooler, the tendency for detonation and the resultant timing retard by the ESC will be reduced, so you should have a little better throttle response when "punching it" from cruising speeds.

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Vader
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bwahahaha if that replacment egr costs $300, it better be gold plated!

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egr valve should be no more than 60.00 tops i just replaced mine and it was 56.00 it is on a 87 Iroc with 350 TPI

 

The price does vary a little (there are at least 6 different valves based on different years and engine combos) but mine was $85 and NOT from a cheap dealer. It would have been much cheaper from Scoggin-Dickey for example. $300 is waaaay too high.

Also the solenoid could be bad, that often happens then the computer can't open/close the valve when it wants to. The solenoid is really cheap, $20-$30.

Even if you're paying labor, replacing the EGR valve isn't more than a few minutes work, maybe half an hour if they really take their time and clean the surface where it attaches to.

The only expensive EGR-related thing (maybe) that you have might be the MAP sensor. On newer TBIs (maybe all?) the computer watches for a drop in engine vacuum (via the MAP sensor) when it activates the EGR valve. Therefore, if the MAP sensor's broken it can't tell the EGR is working. The MAP sensor is expensive, I don't know if it's $300 but it's up there. However if it was bad you'd be having a LOT of problems, not just code 32.

Also the two folks above are right, I was never able to tell the difference performance-wise with or without my EGR valve. It doesn't hurt performance at all.

[This message has been edited by Eggplant Jeff (edited September 15, 2000).]