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J.
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Reged: 24/11/2007
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Posts: 10
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Loc: Spain
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Re: 2 MOT problems,help please-not steady mid rangeRPM
[re: Roy F]
25/05/2013 01:06
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1st problem solved, thanks to Roy,  it was the ignition switch!!
2nd problem still there , I took me some time to find the lambda connectors I compared your picture and i was sure they should be near the distributor, but they are hard to see, but when find I check with my digital voltimeter and it's signal voltage was jumping all the time between 0,2V and 0,80V tipical jumos were between 0,3 and 0,6v at steady mid range rpm, and it you press accelerator full down for half second, some jumps reached 0,8 volts, but always jumping, as the rpm.
I found that idle rpm was ok at 500 rpm steady , but the readings of lamda sensor alsa were jumping all the time.
also found that when cold started, lambda was 0,40V steady the first 30 seconds ( i suposse it was until lambda sensor get hot)
all this measurings was made with sensor plug connected to car and with a third wire taking the signal to my voltimeter. is this done ok? or should I started the engine with sensor unplugged and see voltages with it unplugged ?
can a engine be started with sensor unplugged doing no damage?
that's all for now,
this was first time i tested a lambda sensor , so no idea if all this is normal.
Any comments or ideas of what to test next are welcomed!!
thank you for your help
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Re: 2 MOT problems,help please-not steady mid rangeRPM
