 | Home > Technical > Testing MAF sensor without diagnostics help ? |
 
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| Go Beyond Member Since: 30 Jan 2012 Location: Headcorn, Kent Posts: 6678  
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Try unplugging the MAF sensor and see if it makes any difference
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18th Jul 2015 4:43pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558 
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ive always found the td5 to be quite flat low down as standard
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18th Jul 2015 4:44pm |
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| Crs90 Member Since: 08 Jul 2015 Location: In my excavator Posts: 82
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Cheers I'll try unplugging it and see. Am just a bit surprised how flat it is low down, certainly thought it would go better.
Chris. |
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19th Jul 2015 8:46pm |
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| taazzukcb Member Since: 30 Aug 2013 Location: Derbyshire Posts: 663 
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What did you come from before?
I found the same when moving from 300tdi to TD5. Yes the TD5 has the clout up top, but low down, in standard trim, it's take a bit to wind up. You can also test the maf with a multimeter if you dont have diag. |
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19th Jul 2015 8:53pm |
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| Crs90 Member Since: 08 Jul 2015 Location: In my excavator Posts: 82
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Evening taazzukcb, previously I had a 2.4 td Hilux and that definitely has more go low down, maybe its the MAF not telling the ecu what it needs to hear ? Is there a set voltage reading you should have from the MAF ?
I am slowly working through things it's got top notch fuel in, new fuel filter, new oil and filters and new air filter, air intake isn't clogged in any way and I am running empty as well. (not loaded with stuff in the back or towing) Cheers Chris. |
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19th Jul 2015 9:11pm |
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| Crs90 Member Since: 08 Jul 2015 Location: In my excavator Posts: 82
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Evening taazzukcb, previously I had a 2.4 td Hilux and that definitely has more go low down, maybe its the MAF not telling the ecu what it needs to hear ? Is there a set voltage reading you should have from the MAF ?
I am slowly working through things it's got top notch fuel in, new fuel filter, new oil and filters and new air filter, air intake isn't clogged in any way and I am running empty as well. (not loaded with stuff in the back or towing) Cheers Chris. |
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19th Jul 2015 9:11pm |
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| taazzukcb Member Since: 30 Aug 2013 Location: Derbyshire Posts: 663
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Looking down the plug at the pins, check Pin 3 Voltage when at idle, should be (I think) 2V or there abouts.
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19th Jul 2015 9:51pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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sometimes cleaning the maf will help
remove and spray with brake cleaner , LET it dry , refit |
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20th Jul 2015 7:13am |
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| Crs90 Member Since: 08 Jul 2015 Location: In my excavator Posts: 82
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Well today I had some time off and enough time spare to do some jobs. I replaced the cam cover gasket that was leaking oil down the back of the block and also unplugged the MAF sensor as was suggested. Difference is night and day, goes well now and I would say it is a good 40% better than it is with the MAF plugged in. I plugged it in again and performance is shocking. I'll get a new one on order this week, anyone have a good supplier of genuine ones / Cheers Chris. |
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26th Jul 2015 8:04pm |
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| Go Beyond Member Since: 30 Jan 2012 Location: Headcorn, Kent Posts: 6678
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26th Jul 2015 8:20pm |
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| taazzukcb Member Since: 30 Aug 2013 Location: Derbyshire Posts: 663
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Any of the indies/parts suppliers will have one. Just make sure it's a genuine/VDO one though.
Cheap ones are notorious for lasting minutes and also giving slightly out readings. Try all the usual, LRDirect, Island-4x4, Paddocks etc and just go with the cheapest. Some of them chuck in free Del over £50 and a genuine VDO will be somewhere from £60 upwards, so that's a bonus of sorts! |
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27th Jul 2015 10:18am |
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| Crs90 Member Since: 08 Jul 2015 Location: In my excavator Posts: 82
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Thanks for the help
Chris |
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27th Jul 2015 7:37pm |
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