Loosing power from 2500rpm up.... hmmmm

[droptop]

Ok well, I did the spark plugs and wires acouple weeks ago on my g/f's explorer and all was fine for a few days but then it all went too CRAP!!! We were driving up a Hill and it could not get past 2500rpm.... its was like missing real bad...... and from now On it does it all the time going down the road trying too pass anythign...... it seems too run better when its cold though but once it warms up were screwed....

I've checked the wires.... still look NEW but figured maybe one went bad or soemthing ?? so I put the old onces back on and it still ran the same.....

I also put in a New Air Filter...



Can anyone help me with this problem? My g/f is really getting anoid...


Also the Service engine light does not come on!!!

E-mail me at
droptop@rogers.com


Mike

 

[MrShorty]

I would probably run the EEC-IV self-tests, even though the service engine light doesn't come on. Not all EEc-IV faults trigger the check engine light.
Is it missing real bad? Are you certain all of the spark plug wires are making good contact at the coil and the spark plugs? Any signs of spark leak (run the engine in the dark and see if you can see sparks jumping out of the wires)? Did the insulator (ceramic portion) of any of the spark plugs get damaged?

 

[droptop]

ok I ran a Test on teh Computer and here is what it came up with....


-Heated Oxygen Sensor Fault / lean bank #1

-Heated Exhaust gas oxygen sensor fault unable to switch/lean during part throttle bank #2

-Fault in Injector circuit or mass air circuit

I read on this site in the Explorer tips about cleaning the mass air Meter, Could this be one of my problems?

Also it would look liek I need a Oxygen sensor??

any help with this stuff would be GREAT!!! thanx guys and gals....

 

[MrShorty]

Actual code numbers would be more useful. Don't forget to indicate which test (KOEO hard fault, KOEO continuous memory, or KOER).
It is somewhat unlikely that you would lose both O2 sensors at the same time. At this point, I wouldn't worry about replacing O2 sensors until farther along in the diagnostic process.
Question about that third code: Is it an injector fault or a mass air flow sensor fault? (This is a case where the actual code number would help. Also, having a code list that is year/engine specific can be important sometimes. In some cases they used the same code to indicate different things, depending on the application.)
Since you mentioned the MAF, it wouldn't hurt anything to clean it up and make sure that isn't the cause of the problem.