1997 Chevy Venture
3.4L 6cyl
Check engine
codes = possible o2 sensor
Repairs done prior = previous owner stated that it need an o2 sensor
tech = jk
question = Is the o2 sensor something I should try to tackle? It is my
understanding that theres 2 different o2 sensors one before the CAT and
one after. Is there any easy way to determine which one is
malfunctioning without putting it on diagnostics? It seems to run fine when
driving but does idle rough when parked. Was also told that by taking out
the
main two bolts on the front of the engine that it would come forward
enough to get to the o2 sensor this leads me to believe it is the one
before the CAT????? Please Help Me!!
JK:
It does sound like they were talking about the oxygen sensor in the rear
exhaust manifold, which is the pre-catalyst sensor. Removing the 2 front
upper engine mount bolts will give room in the rear to access that sensor,
with the proper tools. As long as the van is in park, and you 'slave' the
motor forward, then secure it to access the rear exhaust manifold. That
sensor is below the ignition coils/module assembly. To help decide if that is
the sensor, you could have a scan done. Most of the large national parts
store chains will do this free of charge. That may be the cause of an idle
problem, but it may also be the result of another problem. Would suggest
getting the scan done first. Let me know if you need more help.
3.4L 6cyl
Check engine
codes = possible o2 sensor
Repairs done prior = previous owner stated that it need an o2 sensor
tech = jk
question = Is the o2 sensor something I should try to tackle? It is my
understanding that theres 2 different o2 sensors one before the CAT and
one after. Is there any easy way to determine which one is
malfunctioning without putting it on diagnostics? It seems to run fine when
driving but does idle rough when parked. Was also told that by taking out
the
main two bolts on the front of the engine that it would come forward
enough to get to the o2 sensor this leads me to believe it is the one
before the CAT????? Please Help Me!!
JK:
It does sound like they were talking about the oxygen sensor in the rear
exhaust manifold, which is the pre-catalyst sensor. Removing the 2 front
upper engine mount bolts will give room in the rear to access that sensor,
with the proper tools. As long as the van is in park, and you 'slave' the
motor forward, then secure it to access the rear exhaust manifold. That
sensor is below the ignition coils/module assembly. To help decide if that is
the sensor, you could have a scan done. Most of the large national parts
store chains will do this free of charge. That may be the cause of an idle
problem, but it may also be the result of another problem. Would suggest
getting the scan done first. Let me know if you need more help.
