MAF testing info

[mike74]

Hmm, may still be a faulty FPR then? You tried hooking up a foot pump to the FPR, sticking in 1 bar say and trying to start it? If this works ok then probably a duff regulator

[UrS4boy]

Hmm, may still be a faulty FPR then? You tried hooking up a foot pump to the FPR, sticking in 1 bar say and trying to start it? If this works ok then probably a duff regulator

Haven't tried that (yet). FP regulator was new in a box about 10 days ago.

[UrS4boy]

Plan A was to start the car for 10 secs. Then stop it and remove the fuel rail, placing the ends oft he injectors in 5 glass jars and monitoring them for leakage. ...Plan A is in progress while I cut the front and side lawns.

Plan A results: Some minor but noticeable leakage into Jar No. 1, some in 2 also. Not happy.

[Error404]

Did you resolve this issue Dave?

Testing maf is done on hot idle using diagnostics, group 002. Not by measuring obscure voltages.
It's important what the ECU sees, nothing else.

What should we be looking for from the MAF in the measuring blocks Dmitri?

[prj]

ABY hot idle, aircon etc off Group 000, 2nd value <25
ADU hot idle, aircon etc off Group 000, 2nd value <21

If value is above that and you are 100% sure there are no leaks, replace MAF.

[Error404]

Great, thanks very much

[UrS4boy]

Did you resolve this issue Dave?

Not yet. I had the RS2 injectors cleaned/refurbed (again). The technician told me that they were filled with a jelly like substance that he put down to old gas (which I would dispute). I got them back before I went on holiday (Sept 8 to Sept 29 in London (your London (1 wk) and Paris (2 wks).) but didn't have time to get them re-installed. Got a cold/flu in Paris and fell like cr@p so haven't gone out the garage to finish the reinstall (also have the steering wheel off to redo the UrS6 to UrS4 conversion) and can't start the car until I get the air bag in place. (i.e. Can't get there (injectors) from here).

Maybe today.

[S2central.net]

Factory info for 3B and ABY is for Group 000 field 2 (MAF) to be in range 20-24 on warm idle. Tis a little lower for ADU of course but need to look that up.

[S2central.net]

AAN will be same range obviously