Hi again, well I've Made my car worse so far rather than better. While looking for the hesitation I took the throttle body off, cleaned all parts, took idle valve off & cleaned but somehow managed to pull the pin out & had to put it back by hand.
When I refitted it all the car started but wouldn't idle so I checked codes which showed p0101 & p0102. I cleared these & it started & idled fine & I left it parked until today. When I started it it ran ok then a little lumpy but cleared, I moved the car off the drive to shuffle my other cars around & when I went to re start it would fire & cut out or pop back through inlet. I reread the codes & the p0101 was back. Eventually I got it started by disconnecting the airflow meter & then it fired up & idled too & I was able to drive it onto my drive. I left it running a good ten minutes (with the airflow meter reconnected) but have I caused a problem ? Does the idle valve have to be programmed ? Or is it coincidence & do I have a duff airflow meter or sensor?.
All input welcome please

 

no need to program idle control valve, only tps when you swap it out. If it came apart may be broken.

 

Ok, thanks for that. I did try a second throttle body which had a tps on it but then refitted original one. Could this have upset it? & if so how does the tps need resetting ?. I have a code reader but the garage I work for has Autodiagnos kit (which covers most models) or is it not more simple than that?
Sorry if these are stupid questions but I'm a little out of touch with electronic control systems

 

Just checked the monitor list on code reader & tps reading seems about right but air flow shows 0g/s at idle & no matter what throttle position is. This can't be right surely! Maybe airflow meter is duff !?

 

A bit more advice please if possible. I have checked via wiring diagram from the stickies & traced back the MAF wiring, I have battery voltage on two terminals & earth on the third. Am I right in assuming I should have battery voltage on one then 1.2 volts at idle from second & earth on third ? If so I assume the air flow meter is faulty!. Please correct me if I'm wrong

 

Your thoughts are correct, there should not be B+ on 2 pins, just on the black one. I assume you have measured these by back probing the connector. So before condemning the MAF, unplug the connector and check the voltages to ensure you don't have a wiring problem.

 

Thank you for the confirmation. I have checked continuity on the wires from ecu to multi plug of air flow meter & they all seem ok but can't remember whether I checked the B+ (I am sure I did but will double check).

 

Just thought I'd add that after fitting a new airflow meter today the car is totally transformed.