why is 3 new mafs making it run fast

[bandit600]

hello

every maf i have put on my 98 diesel freelander is causing it to self rev i have used 3 new maf's and 1 used bosch maf but all make it run fast. is their anything else attached to the maf that could be at fault.?????

when unplugged it runs fine



cheers
if more info is needed please see http://www.landrovernet.com/forum/showthread.php?t=116015

[TEMPL4R]

We had a similar problem on a Chrysler PT Cruiser, if we disconnected the MAP sensor, it ticked over OK, connected it ran at nearly 3000 revs ( a petrol engine though).

It was the extra air/bypass solenoid that was at fault, it was jammed.

Just because one sensor alters the tickover, doesn't mean it is the problem. If you have changed 3 MAFs, it probably isn't that sensor. It's probably setting itself to default as the MAF is not sensed by the ECU.

Have you had it read for codes?

chris

[bandit600]

We had a similar problem on a Chrysler PT Cruiser, if we disconnected the MAP sensor, it ticked over OK, connected it ran at nearly 3000 revs ( a petrol engine though).

It was the extra air/bypass solenoid that was at fault, it was jammed.

Just because one sensor alters the tickover, doesn't mean it is the problem. If you have changed 3 MAFs, it probably isn't that sensor. It's probably setting itself to default as the MAF is not sensed by the ECU.

Have you had it read for codes?

chris

hello

had it on a machine at a local place weeks ago when it started but showed up nothing, does this have an extra bypass solenoid???

cheers dean

[Beedoc]

In many cases like this simply opening up every connection of the management system and cleaning all contacts and spraying with WD40 can help.

This link may be of help, I know they're two totally different vehicles, but it's a good explanation and pointer to some problems.

http://www.fordscorpio.co.uk/cleanmaf.htm

Good luck.

[bandit600]

hello

after weeks now of running with maf unplugged the fuel cons killing me

anyone have any more idea's as to what the problem is???

cheers dean

[Satancom]

Is there an idle air control valve on a diesel?

[bandit600]

Is there an idle air control valve on a diesel?


hi

sorry no idea, and wouldn't know where to look to be honest