Ford Galaxy 1.9Tdi - As simple as a new MAF?

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Mon 14 Mar 2011 11:15
Ford Galaxy 1.9Tdi - As simple as a new MAF? - legodad

Our Galaxy has been chugging at low revs, mostly when gently accelerating away from a standstill, for a number of months. Recently, while under heavy acceleration, the MAF seemed to trip out and put us into limp mode but we did notice that the chugging stopped. We stopped the car and restarted the engine and the power was back but so was the chugging! We have since tried unplugged the MAF and the chugging stopped but the engine had very little power.

Does the fact that the chugging stopped when the MAF was unplugged mean that the problem is 100% definitely caused by a faulty MAF? We really can't afford to get into a situation opf swapping out part after part until we find the culprit.

Any help greatly received.

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Tue 15 Mar 2011 10:19
Ford Galaxy 1.9Tdi - As simple as a new MAF? - dieselnut

I suspect that the chugging you refer to is an air leak in one of the air pipes between the turbo / intercooler / inlet manifold.

A leak will put the engine into limp home mode.

Look very carefully at these pipes as splits or holes don't show up until they are under pressure from the turbo. Look for any oil stains on or near the pipes where escaping air will have left a teltale deposit.

Also check all the pipe clips are tight.

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Tue 15 Mar 2011 19:15
Ford Galaxy 1.9Tdi - As simple as a new MAF? - the_bandit

Assuming you don't have access to VAG-COM, a faulty or failing MAF is normally diagnosed by disconnecting it but the performance should improve not worsen.

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