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Omega General Help / Re: tech 2
« on: 29 March 2018, 13:15:32 »
Autovaux in East Kilbride do tech 1&2
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Presumably the fuel pressure regulator vacuum line is still connected to the bottom of the throttle body?
I don't mean to be rude, but if you don't know what a MAF looks like or where it is, I'd probably get some help.
Anyway, as well as the above suggestions, look for split pipes (air to plenum) and split vacuum pipe end. Also, it is worth checking the throttle body to see if it's gunked up.
It's no prblem i know where it is. I just put that all back together last year after doing timing belt. Everything looks fine but will check agsin. If i dont see anything obvious what is next step with maf?
if you had the tech, tools and experience you could examine how well it is functioning.
As you don't have those, disconnect the electrical connector on the MAF, and drive the car. This will put the EML on, but if the actual problem is no longer present then buying a quality new MAF is your next step.
But you're already breaking the first rule of diagnosis by not going back over the work you did before the fault.
I don't mean to be rude, but if you don't know what a MAF looks like or where it is, I'd probably get some help.
Anyway, as well as the above suggestions, look for split pipes (air to plenum) and split vacuum pipe end. Also, it is worth checking the throttle body to see if it's gunked up.
New MOT document comes into force on 2th May:
https://www.gov.uk/government/publications/mot-inspection-manual-for-class-3-4-5-and-7-vehicles
Currently the draft shows an EML lit as a major fail.
There is nothing in the MOT manual that requires or allows connection to an OBD port so I'd be having a word if they tried that on my car. It's possible that emissions testers designed for the european market have the interface fitted but it's not used in a UK MOT test.
If by a guide you mean, "unplug it and see if anything changes..." then yes, there's a guide
If Fuse 19 is advising MAF, then I would be looking there before anywhere else. Unplug the MAF and see if the symptoms change.