PicoScope 7 Automotive
Available for Windows, Mac, and Linux, the next evolution of our diagnostic scope software is now available.
Indeed YES. Some very sharp cookies here, arguably the best set of automotive experience and brains on the planet !!! But you do need to feed them with data that oozes quality and quantity !I was just hoping someone may know if any component in particular is known for giving these types of problems.
The MOT tester is guessing ???The MOT tester suggested that the Haas lambda sensor may not be as good as a Bosch even though the scope shows its working OK.
In the absence of a good scope trace back probed at PCM I disagree with the above. P0130 is quite specific with regard to its meaning and setting criteria. I am keen to see the cross counts and crossing times.Fault codes.
The only code I have had repeatedly is P0130 the lambda sensor but as I said previously I think this is the symptom, not the cause.
Just back probe at the connector - PCM Preffered.I will do the check and post scope image as suggested - first I need to make up some more breakout leads
Fuel pressure will never equal Manifold pressure - (You would be in a lot of trouble if it did) - Forget that! If you have 3 bar FP consistently and the vacuum pipe is connected where it should be - move on !With vacuum pipe attached I would expect the fuel pressure to drop to match manifold pressure when throttle blipped
Not sure what you mean by "in workshop" Components removed from vehicle or in the workshop as opposed to out on the road ? And what is your definition of fine ?I have tested. CPS, CamPS, Lambda and MAF in workshop, all fine.
Might be an idea to swerve BP for a while - that could be the cure ???The fault seems more frequent / more severe if I repeat refuelling at the same filling station (BP ultimate).
His comment may be based on many good things. It is not based on hard facts and evidence, so it remains just that, a comment and should be treated as such.My MOT tester is a very experienced mechanic, streets ahead of many main dealer mechanics. His comment on Hass vs bosch is based on a lot of experience.
I think I could be of more use searching the requested scope captures that you may be posting. (STFT LTFT too)I think if you search the internet there is a lot of information that replacing Bosch MAFs with other makes often results in worse engine running.
What other codes are recorded but not returning immediately when cleared?xj40s wrote:Fault codes.
The only code I have had repeatedly is P0130 the lambda sensor but as I said previously I think this is the symptom, not the cause.
P0130 is not set purely due to an intermittent fault, neither is it necessarily a circuit low issue - that would entice P0171 - System Lean whereas OP has a slightly rich issue - If we can rely on his MOT tester !P0130 is a intermittent problem, which refers to the 02 sensor bank 1 sensor 1 circuit voltage being low.
Actually the P0130 is what is recorded on a Corsa C at my place at the moment, read by Tech2, which provides the description of a low voltage circuit issue. When I get a minute I'll check TIS and see what the procedure refers to, which I'm sure will be correct for a diagnosis.STC wrote:P0130 is not set purely due to an intermittent fault, neither is it necessarily a circuit low issue - that would entice P0171 - System Lean whereas OP has a slightly rich issue - If we can rely on his MOT tester !P0130 is a intermittent problem, which refers to the 02 sensor bank 1 sensor 1 circuit voltage being low.
Google definitions can be off, cut and paste at your peril as in this case !
I would be looking to confirm or deny Crossing Times but OP is reluctant to post data requested since April