[Chris]

Can you help
My apexi is playing silly buggers, the car hasnt been run for ages and the batterys been flat.
On sorting her out the idle was really lumpy ie would drop to about 200 rpm and nearly stall.
Took her for an MOT and then she decided to sit at 4k - the throttle wasnt snagged.
Ive cleaned the TPS that was full of crud.
The Maf voltage incidentally is showing 1.07 i gather it should be 1.2.
Now heres the funny thing - if i plug in the old ecu it runs perfectly, i also plugged in a P1 ecu and that worked for a bit but then the car refused to start.
Ive also checked the idle settings on the apexi and they're correct.
Could a shagged Maf cause this lumpy running ?
Any advice will be welcome folks.