Check Engine light

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Feb 27, 2004 | 09:05 PM

christaylor

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Fleet Mechanic

Joined: Oct 2003

Posts: 1,619

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From: Forest Hill MD

Check Engine light

Pulled the codes on my 95 Explorer and got code 33. Which the book tells me is "EGR valve fault / not closing properly / TPS fault (Diesel)

I have replaced the EGR valve and sprayed throttle body cleaner into the tubes. The light came back on after the engine was warmed up. After a short trip then restart the light stays off.on short trip back home. I have already unhooked the battery for about a 1/2 hour to reset the computer. What am I Missing??? i have not had a chance to re pull the code but this is the second time I have pulled the EGR valve to check and gotten the code again.

Any help appreciated

Chris

I am going to post this in the 4.0 forun also

Feb 28, 2004 | 09:36 AM

christaylor

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Fleet Mechanic

Joined: Oct 2003

Posts: 1,619

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From: Forest Hill MD

Nobody?

Feb 28, 2004 | 02:52 PM

87 XLT

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From: SoCal

Pull the code again & post it here. It's probably a problem with EGR control not the EGR itself.

Feb 28, 2004 | 02:57 PM

luckild

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Joined: Jun 2003

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Check the EGR flow. Activate EGR with engine running and note it's response. Does it stall? If not, port plugged, Good luck and let us know.

Feb 28, 2004 | 10:46 PM

christaylor

Thread Starter

Fleet Mechanic

Joined: Oct 2003

Posts: 1,619

Likes: 12

From: Forest Hill MD

Ok how do I activate the EGR. Unplug the vacume line? Or loosen the large nut into the valve? thanks

Chris

Feb 29, 2004 | 08:00 AM

luckild

Senior User

Joined: Jun 2003

Posts: 400

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Unplug vacuum line and apply vacuum to the nipple of the EGR. The hose at the ERG does not have vacuum to it, unless the cumputer calls for it. Does this help? Let us know.

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