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| nosnibod Member Since: 15 Aug 2007 Location: West Midlands Posts: 370   
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First and cheapest thing to do. Unplug the MAF sensor and go for a drive. If it suddenly seems nice and smooth then you've found the answer.
If that doesn't show any difference then clean the MAP sensor as well - they get terribly gunged up, especially if you still have the EGR fitted. If it still doesn't drive nicely then get someone with the right diagnostic kit (and who knows how to use it) to have a look - preferably whilst being driven. IRB Developments and others such as Bell Autos can do this sort of thing. Don't start replacing stuff hoping to hit the answer - that's the expensive way of doing it. Dave Green Goddess - 1998 Defender 110 300tdi |
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20th Jul 2010 4:21pm |
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| changill Member Since: 13 Dec 2008 Location: North West - Preston/Lancaster Posts: 27 
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Got to go with nosnibod. Disconnect the MAF sensor and see if it makes a difference.
If you aren't happy doing this then take the MAF sensor out. HAve a look inside the wire mesh and there should be two probes. Each consist of 2 legs and a thinner wire between them. Check that everything is there and is clean. Spray some brake cleaner on them and "blow" dry. If that don't work then look for internally collapsed intercooler hoses and give the MAP/IAT sensor a clean. " bolts to remove , if you don't already know. Let us know if any of that helps? Chan Only Alcohol Can Save me Now Nanocom Available in the North West |
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27th Jul 2010 12:19pm |
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| Landy nut Member Since: 22 Dec 2007 Location: In hiding Posts: 154 
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Well I did what I did on my last one. I took out the inlet manifold sensor, gave it a good clean and put it back. No difference. I then disconnected the air flow meter and voilą, better driving, better acceleration and generally nicer to drive. Throttle seems completely different to use.
Took it back to the dealer who then ran a diagnostic and changed the air flow meter. Picked the vehicle up and it still isn't quite right. Power still varies and acceleration is either go go go or plod as you fancy. The low down power and torque isn't great either. I am fed up now. Nothing shows on diagnostic, there is a new air flow meter and the inlet manifold sensor is clean. |
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3rd Aug 2010 7:49pm |
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| changill Member Since: 13 Dec 2008 Location: North West - Preston/Lancaster Posts: 27
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Have you had the intercooler hoses off? They sometimes delaminate from the inside and cause air flow problems. Another simple (and cheap) check is a look at the vacuum Air hose from the Turbo wastegate. Check it for security, holes and leaks along its length and at both ends. Depending on the symptoms the wastegate might also be sticking. What mileage are you on?
The MAF sensor that has been fitted could always be duff!! Unplug again to confirm? It would probably be best if you could do a run with a nanocom fitted. This records real time sensor data that you can analyse to see where any problems lie. If you are in the North West you are welcome to pop round to mine and use my Nanocom. Cheers Chan Only Alcohol Can Save me Now Nanocom Available in the North West |
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4th Aug 2010 8:10am |
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| Landy nut Member Since: 22 Dec 2007 Location: In hiding Posts: 154
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Well I am pleased to report that the new afm seems to be bedded in and the drive has improved dramatically. Happy camper now I tell you.
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7th Aug 2010 2:42pm |
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