EGR whistle
#1
EGR whistle
I have been getting the occasional code 32 so I decided to inspect my egr valve, turns out it was completely clogged with carbon so I bought a replacement from AutoZone (only place that had one). I also noticed that someone had plugged the vacuum connector that goes to the top of the egr with a ball bearing (no idea why), so I bought a new connector.
After getting the new valve on with the new connector, I hear a whistle coming from the egr when I rev the engine, and it also seems to idle rougher. Could this new egr be leaky? I'm trying to decide if I should take it back.
After getting the new valve on with the new connector, I hear a whistle coming from the egr when I rev the engine, and it also seems to idle rougher. Could this new egr be leaky? I'm trying to decide if I should take it back.
#5
Re: EGR whistle
The exhaust smells rich, but I think I may have a leaky injector.
If that solenoid is closed like it's supposed to be, I shouldn't have any vacuum (or whistling) from the egr. Is that correct?
I looked on RockAuto, but what they're showing as a egr solenoid looks to be some kind of temp sensor.
If that solenoid is closed like it's supposed to be, I shouldn't have any vacuum (or whistling) from the egr. Is that correct?
I looked on RockAuto, but what they're showing as a egr solenoid looks to be some kind of temp sensor.
#6
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Re: EGR whistle
if your egr is open causing the engine to be lean the oxygen sensor will force the car to run rich. There is a sensor in the egr and when that is grounded that causes the code 32.
there is a picture of the solenoid. there should only be vacuum to the solenoid now. when solenoid is commanded to open that's when the vacuum gets applied to the egr valve.
https://www.thirdgen.org/forums/tpi/...rs-i-need.html
there is a picture of the solenoid. there should only be vacuum to the solenoid now. when solenoid is commanded to open that's when the vacuum gets applied to the egr valve.
https://www.thirdgen.org/forums/tpi/...rs-i-need.html
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#10
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Join Date: May 2011
Location: patterson, ca
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Car: 1986 iroc-z
Engine: 5.0 tpi
Transmission: 700r4
Axle/Gears: stock.
Re: EGR whistle
err......if the egr is open it will allow exhaust(an inert gas) to take up some volume in the cylinder leaving less allowable volume for oxygen.since fuel molecules cant properly mix with exhaust and there is less oxygen, it would actually run rich and definitely smell like it.
#11
Re: EGR whistle
Well someone had plugged the egr vacuum line with a ball bearing, so I guess that was their "fix" for the solenoid being stuck open.
I removed the old solenoid and sure enough I could blow air right through it, so no doubt it's not working. I did buy the one for a '95 Caddy like mentioned on another thread, but the elec connector doesn't match up, so I guess I need to get one of those from TPI-parts.
Ugh, another week long wait.
I removed the old solenoid and sure enough I could blow air right through it, so no doubt it's not working. I did buy the one for a '95 Caddy like mentioned on another thread, but the elec connector doesn't match up, so I guess I need to get one of those from TPI-parts.
Ugh, another week long wait.
#14
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Car: 1986 iroc-z
Engine: 5.0 tpi
Transmission: 700r4
Axle/Gears: stock.
Re: EGR whistle
hey just some info i read in my gm 1986 camaro and 1990 camaro manuals. they both say that the egr solenoid is a normally open actuator and the ecm grounds it or turns it "0n" to close the solenoid and block vacuum flow to the valve. if you can blow or suck through the solenoid disconnected or turned off that is normal and nothing is wrong. if you can do the same with it energized on (closed) then the solenoid is bad, if not then you got a circuit issue. hope it helps.
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