Ok needing some help out there........i have a 1991 isuzu rodeo 3.1
litre thats been giving me grief lately.......basically idles fine but
does not want to pick up speed when you give it gas....in the last week
ive changed the o2 sensor and the temperature control sensor and the
ECM still reads o2 sensor circuit. When the codes were first read it
was a code 44 which is lean....changed o2 sensor then temp sensor and
now it reads a code 13........no clue where to go from
here.......anyone out there have any suggestions ???
You may have up to 3 O2 sensors, one on each exhaust manifold and one after
the catalytic converter. Because a '91 is pre-ODB-II I can't look those
codes up for you. Do you know what code 13 indicates? Also, I've hears of
new O2 sensors not functioning correctly, but that seems like a long shot to
2 other possible areas.
1) The fuel filter.
2) The ignition coil. To check it, first locate it in the light, then when
it gets dark, start the engine and look for any sparks or arcing from the
coil. You may have to rev the engine a little to get it to "leak."
Ya the code 13 is the o2 sensor circuit,that is not the same as the lean
code.I have now changed my plugs and wire cap and rotor as well,and sill no
change.I did find that the o2 plug had come un pluged,but all that did is
stop the codes.Still does not run right,any more ideas?????????
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