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Jun 14th, 2026
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Joined: May 2010
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OP
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Joined: May 2010
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Does anyone have any experience on troubleshooting the MAF on a 2003 (GEMS) Plus 8, they look to be expensive items and I wondered if I could make a simple ohmic resistance test before committing to buy one? The problem I have is the engine will start (just) but not continue running so I'd like to eliminate this before moving on to the IACV. Many thanks!
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Joined: Nov 2010
Posts: 167
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Try starting and idling with the MAF disconnected.
'65 +4 four seater
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Joined: Sep 2008
Posts: 516 Likes: 1
Talk Morgan Regular
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Talk Morgan Regular
Joined: Sep 2008
Posts: 516 Likes: 1 |
Where abouts are you? I have a new old stock one that I bought in exactly the circumstance that you're trying to avoid. Turned out to be a lambda sensor problem so I put mine back in it's box having wasted a lot of time and trouble locating it (at the time they were out of stock at the local main agents).
There are also much cheaper non genuine ones on ebay, but the landrover forums seem to suggest that they may not be ideally set up. However they may give an indication of whether your problem is MAF related or something else.
If you live nearby I could lend you mine to see whether it helps.
pm me if you don't get sorted.
Malcolm T
Malcolm T
1966 +4
1957 TR3
1963 TR4
1983 LR 110
1985 Robin Hood 2.0l
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Joined: May 2010
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Malcolm - just PM'd you the ohmic values I measured on mine last night. I'm hoping to borrow a scanner tomorrow since I would hope this problem would log a DTC. Many thanks!
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Joined: Jul 2007
Posts: 28,899 Likes: 352
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,899 Likes: 352 |
Try giving all the contacts a good clean. Frequently it's not the actual MAF that is at fault, but a poor electrical connection somewhere in circuit (or Lambda sensors!  ). Cheers,
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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Joined: Jul 2011
Posts: 15
New to Talk Morgan
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New to Talk Morgan
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The only times that I have had idle issues at startup on my GEMS +8 were when the battery was not completely charged. Now I keep a battery tender on it if it is going to sit for more than a few days.
Also, using a Faultmate Nano or similar, one can check the number of steps for the Idle Air CV which should read between 15 and 30 steps. See page 77 of GEMS by David Poole on the GoMoG site.
Skip #12034
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Joined: May 2010
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Thanks Skip and all other posters - I've pretty well narrowed it down to the IACV, which is now probably the cleanest part of the car, but the problem persists. I'm also now convinced it has to be the stepper motor and I'm putting her in to a bloke with a Rovacom this week.
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