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Old 04 August 2007, 07:53 PM
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GONZO01
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Evening all just after some advice with my Scooby.Just recently noticed that when at a standstill and on idle the revs keep dropping off and coming back only does now and then but more often than not lately car still pulls fine though any ideas what could be wrong
Old 04 August 2007, 08:54 PM
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davesti330
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My car used to do this after i'd been on a dual carriage way or quick road then stop at lights and the idle would drop low,stalled a few times aswell. I took of my induction kit and cleaned the air mass which seems to have cured it
Old 04 August 2007, 09:03 PM
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neil.p1
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i would say your maf is on its way out get a new one before it gets too bad they can be known till cause engine failures
Old 04 August 2007, 09:18 PM
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GONZO01
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Where can I get a new maf sensor from and how much are they?
Old 05 August 2007, 02:27 AM
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chocolate_o_brian
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Originally Posted by GONZO01
Where can I get a new maf sensor from and how much are they?
depends what the car is. £90 from scoobybits for an m.a.f. sensor for my my99 uk classic. just the little crappy sensor, not the housing.

have you considered the idle control vlave me be fooked too?
Old 05 August 2007, 11:50 AM
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Paul3446
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I had exactly this and it was the MAF, as above, can cause engine failure, so be careful.
Old 05 August 2007, 01:12 PM
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i paid 90 pound from the subaru dealer it is a simple job u can do it yourself, thankfully i dont have to worry about the maf no more have a autronic ecu which does away with it

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Old 05 August 2007, 09:10 PM
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How do I check if it is the Idle control valve or my M.A.F?And is the MAF Sensor the same as the air flow meter or no as I had a new air flow meter fitted when I had my mods done about 6 weeks ago.

Last edited by GONZO01; 05 August 2007 at 09:25 PM.
Old 06 August 2007, 09:12 AM
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Yes, air flow meter is the MAF, I'd say it's almost certainly that if you've been modding recently, they're quite sensitive to changes.
Old 06 August 2007, 09:41 AM
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dan83590
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Another thing that nobody has mentioned yet. Do you have an aftermarket Dump Valve fitted? If these are not adjusted properly or worn out you will also get a rise and fall in revs at idle.
Old 29 August 2007, 10:58 PM
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Evening all been away for a while back to my problem with the revs dropping off (only now and again ) have tried going for a run in the car 15-20 mins or so got back home unplugged the MAF sensor and car cuts out.Does this mean that my MAF is ok and it could be something else if so what could it be?The problem only happens now and again if it helps.
Old 30 August 2007, 06:28 AM
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Originally Posted by GONZO01
Evening all been away for a while back to my problem with the revs dropping off (only now and again ) have tried going for a run in the car 15-20 mins or so got back home unplugged the MAF sensor and car cuts out.Does this mean that my MAF is ok and it could be something else if so what could it be?The problem only happens now and again if it helps.
from what you say, maf should be ok. idle control valve sticking possibly. have you tried cleaning it out with brake/clutch cleaner.
Old 30 August 2007, 08:41 AM
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Silly question but is your aircon running.
You will notice with ac running that the fan kicks in a lot more often, causing a dip and rise.

Just a thought.
Old 30 August 2007, 02:21 PM
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Haven't got the aircon running and where on the car is the idle control valve in order for me to clean it and see if that is the problem?




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