Greasemonkey
Member
Registered: 17th Apr 02
Location: Drives a Tractor
User status: Offline
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Right i suspect me Lambda sensor is faulty!!, if i start the car and dissconect it nothing happens enging runs the same i drove it down my close and back up and it didnt make any difference to normal, no ECU light came on either.
I put a second had one on a few months back and as soon as i started the car it struggled to idle and then the engine died so i assumed this one to be faulty, cars got no top end do you think it needs changing
Cheers 
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CorsAsh
Member
Registered: 19th Apr 02
Location: Munich
User status: Offline
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I'm gettin similar prob with my LS, also no change to engine if I disconnect it, no ECU light, nothing...
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miles
Member
Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
User status: Offline
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The engine runs on open loop whilst the car is cold so it wont make any odds.
What happens if you disconnect it when the engine is hot and you are crusing on part throttle?
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CorsAsh
Member
Registered: 19th Apr 02
Location: Munich
User status: Offline
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oooh, i dunno, may go out and try this...
Cheers miles...
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Greasemonkey
Member
Registered: 17th Apr 02
Location: Drives a Tractor
User status: Offline
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i will go find out now cheers
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CorsAsh
Member
Registered: 19th Apr 02
Location: Munich
User status: Offline
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Just been out in mine, nothing at all, then I disconnected the sensor, performance remained the same but light came on... what does this mean? Is the sensor likely to be fucked?
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Greasemonkey
Member
Registered: 17th Apr 02
Location: Drives a Tractor
User status: Offline
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Yeah that happened to me too, performance the same but the light just came on??????, think i ben busted by coppers though DOH
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CorsAsh
Member
Registered: 19th Apr 02
Location: Munich
User status: Offline
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oh no, how? camera?
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Greasemonkey
Member
Registered: 17th Apr 02
Location: Drives a Tractor
User status: Offline
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nah its ok, it was a CCTV one i had no seat belt on, was speeding and had no number plate light, but peeps seem to think i will be ok
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miles
Member
Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
User status: Offline
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If the light comes on then the ecu is reconising that its been disconnected. Thats its different from when it is plugged in, this suggests that if the sensor is faulty it would throw the light up.
The lambda sensor only works on part throttle crusing for fuel economy. Once you floor it gets ignored (open loop).
When the sensor is unplugged (and the ecu light is on) the ecu will use a fixed, and most probably rich, value.
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CorsAsh
Member
Registered: 19th Apr 02
Location: Munich
User status: Offline
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So you're sayin our sensors are ok miles? Otherwise the light would be on all the time?
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Greasemonkey
Member
Registered: 17th Apr 02
Location: Drives a Tractor
User status: Offline
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THis aint good, cos summit definately aint right with the running of the engine under load, i just carnt see why it wont accelerate at the top end of 4th and 5th, its very weird, could it be running too lean or rich at these rpm's and this could be causing it, i KNOW its running very rich at low RPM but not sure about the rest of the range
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miles
Member
Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
User status: Offline
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I'm saying there is no reason to think the sensors are fucked. Although they could be, lol.
Rolling road.
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CorsAsh
Member
Registered: 19th Apr 02
Location: Munich
User status: Offline
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Mines very hesitant and seems to be drinkin fuel like its goin outta fashion... compressions ok tho, had new exhaust gasket so all nice and sealed up... someones mentioned a coolant temp sensor could be the prob?
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Greasemonkey
Member
Registered: 17th Apr 02
Location: Drives a Tractor
User status: Offline
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hope it aint coolant temp sensor mine is only a couple of months old, slowly i have replaced my sensors to get to the bottom of this, lambda, AFM, crank sensor & cam sporket sensor are the only ones left
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