Ford Probe GT EGR 1997

BUFORDEMU

MEMBER
1997 FORD PROBE

I had the check engine light come on, and it was code P0400, EGR problem. I had another used EGR valve, replaced it but the light came back on. I replaced the EGR boost sensor (new), didn't fix it. I then replced the MAP sensor, again, no luck. I could not find any other components pertaining to the EGR system, so I replaced the EGR valve with a new one. Light came back on. I did run a wire through the egr exhaust port in the head, and didn't find any blockage (however I could only go so far and I'm not sure I got all the way through).

Is there any other component or test I should make that I'm missing?

Ken

4 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Is it a 2.0 or 2.5L engine?

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Saturday, November 3rd, 2007 AT 1:32 AM

MERLIN2021

MECHANIC
17,250 POSTS

Yes you need to clean the carbon out with, I use a length of coathanger, all the way to the throttle plate. Then reset the light, if it comes back, replace the EGR Position sensor.

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Saturday, November 3rd, 2007 AT 6:34 AM

BUFORDEMU

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3 POSTS

It's a 2.5 V6

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Saturday, November 3rd, 2007 AT 8:34 AM

BUFORDEMU

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3 POSTS

EGR passage was clogged/gummed up at the exit point in the manifold, which is at the throttle body extrance. Cleaned it out and no light so far. It did display a P0505, "Idle malfunction" at first, but has idled correctly since then, and no other lights.

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Sunday, November 11th, 2007 AT 8:16 AM