knock sensor?
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Freshman User
Joined: Sep 2006
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From: Texas
Code 33: EGR valve opening not detected.
I bought this new less than 8 months ago. And pinging has been going on for longer than that...So i'm thinkin what mustang's thinkin...little or no vacuum. Any other possibilities
I bought this new less than 8 months ago. And pinging has been going on for longer than that...So i'm thinkin what mustang's thinkin...little or no vacuum. Any other possibilities
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Freshman User
Joined: Sep 2006
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From: Texas
On the selenoid for the EGR, there are two vacuum hoses that run out. A green one which i believe goes to EGR. Where does the black one go to? Does it go to the coffee canister? I will replace these two hoses tomorrow so any help will do. THanks a bunch
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
Musclestang, the cars did not use knock sensors, but the truck 5.0's always used a knock sensor, regardless of whether it was mass air or speed density.
Now what you can do is momentarily hook up manifold vacuum to the EGR valve to verify that the valve is actually opening. On my truck, the EGR likes to get stuck, and usually applying full manifold vacuum will pop it free. Then I just hook it up like normal again.
Now what you can do is momentarily hook up manifold vacuum to the EGR valve to verify that the valve is actually opening. On my truck, the EGR likes to get stuck, and usually applying full manifold vacuum will pop it free. Then I just hook it up like normal again.
Last edited by EPNCSU2006; Oct 2, 2007 at 04:45 AM.
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Freshman User
Joined: Sep 2006
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From: Texas
KOER test codes that came out were 538, 536, and 632... Nothing to do with pinging...i'm clueless 
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Freshman User
Joined: Sep 2006
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From: Texas
Ok sorry, reset with battery uplugged...and i did not do the KOER test right with brake/switch/ps/goose(rev)
Only two codes showed up
225 Knock Sensor (KS) signal not sensed during dynamic response test.
167 TPS did not exceed 25% rotation during the Dynamic Response Test.
Could this be the pinging culprit?
Only two codes showed up
225 Knock Sensor (KS) signal not sensed during dynamic response test.
167 TPS did not exceed 25% rotation during the Dynamic Response Test.
Could this be the pinging culprit?
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Freshman User
Joined: Sep 2006
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From: Texas
As this was the first time I had ever done the self tests...I did them wrong. After doing them right, my KOEO System Pass and KOER System Pass. I decided to look at vacuum hoses...And ended up replacing all of them since I had time to do so. My fuel pressure regulator hose than runs to intake had a hole in it. It runs a whole lot better. 
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