Re: 94 Explorer w/ ecc codes 176 AND 177. Advise??

I'd be interested in what you find out. Mine does the same thing. 

When I take a cross country trip, several hundred miles out it starts
sputtering for a few minutes and then recovers. One one trip from
Raleigh NC to Chicago, it did this the whole way. The codes are the
same as what you reported. I replaced the O2 and MAF sensors, but a
year later on another trip, the same thing happened. Mechanics cant
find any problems.

The car runs fine during normal daily driving to/from work/errands.

I basically dont go on any long trips with it anymore. 

Sorry I cant help, but you're not the only one with the problem if
thats any consolation. My theory runs something toward fuel injectors
icing up or otherwise not injecting but I 'm just showing my ignorance
here. The problem goes away when the car sits for awhile, then
reoccurs after a few hundred miles.

dickm

On 2 Dec 2003 20:54:38 -0800, [EMAIL PROTECTED] (Nathan) wrote:

>My 94 Explorer w/117,000 miles has been running very poorly lately. 
>The symptoms only occur after driving on the highway for a while
>(about 50 to 100 miles).  It loses power and runs really rough like
>its misfireing and blows carbon out the exaust.  I checked the stored
>codes and got a 176 (HEGO Sensor indicates system lean [RH]) and a 177
>(HEGO Sensor indicates system rich [LH]).
>
>
>I did some research on these groups and decided to replace the fuel
>pressure regulator.
>
>I am basically just solicitating advise from anyone.  Is this a good
>place to start?  Any other things I should look at or consider. 
>Thanks in anvance for any and all responces.