1992 Ford Explorer

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Hank - 27 Dec 2004 20:37 GMT

My Niece has this 92 explorer and is having poor gas mileage, rough
idle, check engine light is on. I have accessed the OBD-1 error and
the only thing in it is a 33 error code. It seems to be pointing to
something in the EGR does anyone have any tips they are willing to
share on where to go next, possibile diagnostic path or next steps? I
have checked the obvious the vacuum system seems in tact and I can't
detect any leaks!

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Jim Warman - 28 Dec 2004 03:07 GMT

Is this a continuous memory code retrieved in the KOEO test or an on demand
code retrieved during the KOER test? Either way.... the DPFE sensor is the
weakest link in the chain though it is not the only part that can fail. None
of the parts in your particular EGR system are overly spendy so you may opt
to replacing one or two parts as a matter of convenience.

1992 PC/ED pin point test for code 33 seem to centre around the EGR valve
and it's vacuum system (EVRV and hoses and such). Given the rough idle (I
have no idea what you consider poor fuel economy and this is a 2 ton car), I
would vote for a leaking EVRV (Egr Vacuum Regulator Valve) or carbon holding
the EGR valve open...

HTH

> My Niece has this 92 explorer and is having poor gas mileage, rough
> idle, check engine light is on. I have accessed the OBD-1 error and
[quoted text clipped - 3 lines]
> have checked the obvious the vacuum system seems in tact and I can't
> detect any leaks!

Reply to this Message