Dead MAF?
Posted: Sun Aug 21, 2016 7:27 pm
Hi all,
I bought a Defender recently, that has the 3.9 v8 EFI from a discovery. I've had it for about three weeks - it's been running fine but then yesterday it started messing around - it wouldn't rev when I hit the accelerator. It was intermittent to start with but then went full on broken. I managed to limp home in 1st gear on idle.
Now when I start it up it runs lumpy for a few seconds before cutting out. If I disconnect the MAF it will idle fine, but then when I hit the accelerator nothing happens - well actually it threatens to stall until I let off the accelerator when it recovers.
I've hooked up rovergauge, and the throttle sensor is reading correctly - but the MAF reading stays at 0%. I piggy-backed on blue/green wire from the MAF and that reads about 0.5v when the ignition is on but the engine's not running, then goes up to about 2v when the engine is cranking / idling.
Is my MAF dead? Or is the ECU just not reading it for some reason?
I bought a Defender recently, that has the 3.9 v8 EFI from a discovery. I've had it for about three weeks - it's been running fine but then yesterday it started messing around - it wouldn't rev when I hit the accelerator. It was intermittent to start with but then went full on broken. I managed to limp home in 1st gear on idle.
Now when I start it up it runs lumpy for a few seconds before cutting out. If I disconnect the MAF it will idle fine, but then when I hit the accelerator nothing happens - well actually it threatens to stall until I let off the accelerator when it recovers.
I've hooked up rovergauge, and the throttle sensor is reading correctly - but the MAF reading stays at 0%. I piggy-backed on blue/green wire from the MAF and that reads about 0.5v when the ignition is on but the engine's not running, then goes up to about 2v when the engine is cranking / idling.
Is my MAF dead? Or is the ECU just not reading it for some reason?