Rover Gauge question
Discussion
After a bit of fiddling around managed to get RG working (thanks Mark!!). RG helped diagnose the issue that was making the engine cut out at idle and being very lumpy at low revs (turned out the TPS was permanently showing 100% even at idle and on cleaning the harness connector to the TPS problem was resolved). However I still have an unanswered question. All seems well on the RG display except before the engine gets to operating temperature the short term lambda trim is off the scale showing +100% on the RH and hovering around +/- 5% on the LH. This is then expectantly flagging a RH lambda error. When the engine gets up to temperature all appears to normalise - the short term trim then goes to zero on both sensors. and stays that way. (The long term trim is always showing zero for both sensors.)
Why would the RH lambda report such a difference from the LH when the fuelling to both banks should be about the same?
Why would the RH lambda report such a difference from the LH when the fuelling to both banks should be about the same?
When the engine is warming up the LH lambda is swinging between -10% and -5%. When up to full temperature the LH moves to around zero and hardly moves from there. The RH initially goes +100% and flags an error but when up to temperature settles back to zero. I'd be surprised if this was switching into limp. RG is still showing fuelmap 5 and power when driving seems fine.
I'll try switching LH/RH sensors as suggested. If I remember correctly to do that I need a specially adapted (butchered!!) socket.......
I'll try switching LH/RH sensors as suggested. If I remember correctly to do that I need a specially adapted (butchered!!) socket.......
Quick (and depressing) update.... Made up my lambda removal tool from a Draper £4-00 deep socket + angle grinder treatment and removed said sensors - both of them are well and truly fooked - for different reasons.
The one that was reading +100% on Rover Gauge during warm up phase is pretty much eaten away with heat with bendy sections of metal peeling away and the other which appeared to be working ok has got 75% stripped threads - I assume due to a previous (to me) gorilla-type mechanic.
So a final question for you guys - I've looked at replacement prices and bloomin 'eck ouch! The sensors on the car are made by Sagem (French) - any recommendations for replacements at the value/acceptable quality end of the scale?
The one that was reading +100% on Rover Gauge during warm up phase is pretty much eaten away with heat with bendy sections of metal peeling away and the other which appeared to be working ok has got 75% stripped threads - I assume due to a previous (to me) gorilla-type mechanic.
So a final question for you guys - I've looked at replacement prices and bloomin 'eck ouch! The sensors on the car are made by Sagem (French) - any recommendations for replacements at the value/acceptable quality end of the scale?
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