Had another(chinese) coil dying on me yesterday(lasted 18 months) on my way home, changed it on the side of the road, luckily was first one I've checked so only took 5 minutes and I was back on the road. Today, car misfired on petrol and sounded like I have either low fuel pressure or a large air leak. Checked both, all seemed fine. Lots of head scratching, swapped coils over(even though car worked fine on LPG), still nothing. Car would work better with coolant temp sensor unplugged and was showing short fuel trims at over 20%. CTS fine showing correct temps so eventually I decided to swap MAF and bingo, all works fine.
Looking at OBD, both MAFs shows exactly the same values while the car idles and drives. I've checked both running on LPG and while on faulty MAF car would randomly stall and would not idle right but relatively ok when driving. When it was going to stall I had to very slowly open the throttle, otherwise it was dying..
Both MAFs show same 0.04g while idling so I'm a bit puzzled why the car is undrivable with one but fine with the other MAF?
Maybe an electronic guru could shed some light here?

 

Electrical connection . Someone who's name rhymes with the letter " V " came up with the idea of twisting the pins on the connector which are acually in the shape of a blade . The connector is a EV - 1 series which are commonly available at the local auto parts store with a couple of days delivery .Is the metal bar lock engaging ?

If you do a slight tug on the wires you may find one pull out . I replaced alot of connectors because of this test , but not on a Jaguar .

The MAF should read 1.0 grams / second at a idle speed of 650 RPM as a engineering rule of thumb . The Chinese stole from a Canadian company that developed and owns the patent but didn't steal a engineer worth a gran of salt to verify what they stole works correctly .

 

I did think about it and twisted the tabs in the socket a little, just to make sure and that didn't help, also, if there was an issue with connection here, surely OBD would pick this up, unless OBD isn't quick enough to pick up sudden signal drops?
Normally that MAF cable is a bit short too, Jaguar should have made it longer but due to my intake modification for LPG my MAF socket actually points a little lower and therefore not a problem.
Good idea anyway, I might have to look at the wiring at some point too.