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[stuvaux]

Depending on the type/location of lpg tank, liberating the petrol pump could be fun

Might be easier to test at the manifold end

Luckily the LPG tank is in the spare wheel well, so I can still get to the pump via the cover plate in the boot floor (Estate)

[05omegav6]

Small mercies

[stuvaux]

Small mercies

Yes indeed! 

[stuvaux]

Flow rate seems okay.

The problem does seem to have improved slightly. Starting is most difficult from cold, not too bad from hot. It does also seem to tick over okay now too. When driving there is definite hesitation, some times worse than others. I drove it for 7 mikes on petrol to see if it may clear, but hesitation continued.

I am not sure what to try next. Still no codes coming up... 

[stuvaux]

I am still wondering if it may be the MAF...can anyone confirm if it would run fine on LPG even if the MAF was faulty?

Thanks

[omega3000]

Flow rate seems okay.

The problem does seem to have improved slightly. Starting is most difficult from cold, not too bad from hot. It does also seem to tick over okay now too. When driving there is definite hesitation, some times worse than others. I drove it for 7 mikes on petrol to see if it may clear, but hesitation continued.

I am not sure what to try next. Still no codes coming up... 

Have you checked the coil pack 

[stuvaux]

Flow rate seems okay.

The problem does seem to have improved slightly. Starting is most difficult from cold, not too bad from hot. It does also seem to tick over okay now too. When driving there is definite hesitation, some times worse than others. I drove it for 7 mikes on petrol to see if it may clear, but hesitation continued.

I am not sure what to try next. Still no codes coming up... 

Have you checked the coil pack 

Coil pack was replaced 6 months ago. Also, the car runs fine on LPG

[stuvaux]

New update!

Codes 73 and 74 are now coming up, which are Mass Air Flow Sensor Voltage Low & Mass Air Flow Sensor Voltage High.

So does this mean the MAF is definitely faulty? I thought the running on LPG would have also been affected 

[05omegav6]

That does sound like the Maf sensor is on its way out does unplugging it make any difference?

Maf might not affect lpg running as the system possibly has its own pressure/flow sensor 

[stuvaux]

That does sound like the Maf sensor is on its way out does unplugging it make any difference?

Maf might not affect lpg running as the system possibly has its own pressure/flow sensor 

Unplugging it does make it run a little better. Also, it seems to run fine on petrol once warm. I have ordered a used (genuine) MAF sensor now, just have to wait for it to get here, probably early next week now

[stuvaux]

Replacement MAF fitted....car is still the same  . Once warm, it ticks over quite normally, but has a lot of hesitation when driven.

The codes (73 & 74) are still there, so is there anything else this points to?

[stuvaux]

All pipes/connectors around MAF area look to be fine. Not sure what next to try now 

Any advice gratefully received 

[stuvaux]

Still having the same problem. Sometimes car will not start at all though this is rare (only happened twice). I really am unsure what to look at next. The MAF codes are still there, but I was wondering what other faults this may point to? No other codes are coming up

[stuvaux]

Hi all,

Just posting this as the problem is now cured!

The problem was the fuel pipes underneath the metal cover, the ones that go to the pump. It is normally the top of the cover that corrodes. On mine, the pipes both had splits in them (almost right at the top, underneath cover). Simple fix by carefully cutting off the damaged bit of pipe 

Hope this may help someone who gets similar symptoms

Stu