91 regal 3.8L v6 vin "L" n00b question on o2 sensors
untouchablz
08-01-2009, 01:21 PM
I am thinking of changing the o2 sensors, something I have been meaning to do for awhile. I just don't know how many sensors there are? I bought two (unheated) which is what autozone told me i needed only two, however, I couldn't find anything in the hayne's manual, and i have seen some diagrams online that show four (heated) sensors, two by the manifolds, two further down.
Any help/clarification would be appreciated.
Any help/clarification would be appreciated.
2000gpgtx
08-04-2009, 01:29 PM
91 vintage VIN L will only have one O2 sensor in the rear manifold just before the spring loaded flex joint at the pipe. Don't know if it's pre-heated on that particular model, although I believe 91 predates the heated sensors.
Ruley73
08-04-2009, 08:11 PM
91 vintage VIN L will only have one O2 sensor in the rear manifold just before the spring loaded flex joint at the pipe. Don't know if it's pre-heated on that particular model, although I believe 91 predates the heated sensors.
Yes, you've already found the only O2 sensor on your car. It should be just a plain old single-wire sensor. Heated O2 sensors have 3 or 4 wires and were first put on the Regals in 1993. Downstream sensors were added in 1994 IIRC.
Yes, you've already found the only O2 sensor on your car. It should be just a plain old single-wire sensor. Heated O2 sensors have 3 or 4 wires and were first put on the Regals in 1993. Downstream sensors were added in 1994 IIRC.
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