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Forums › The Car › 206 Problems › rough idling need help and suggestions asap


 
 

rough idling need help and suggestions asap
Forum Index206 Problems
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woody1982-1
PostPosted: Fri Nov 04, 2016 5:24 pm Up
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ive got a 1.4 hdi and it didnt have the maf sensor plugged in so i plugged it back in and the idle speed drops every couple of seconds, sounds like the car is trying to stall basically, so i plugged in a scanner and it said air intake temp senor voltage input too high so replaced sensor and maf but didnt change at all, the car idles perfectly with the maf unplugged
i need help dont know what else i can do and the mot is due next week
also changed air filter

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Walton450
PostPosted: Mon Nov 07, 2016 9:08 pm Up
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Sounds stilly but my car idles crap if you start it with your foot on the throttle. I have to discount the battery for a couple mins and then it runs fine.
I\'m Steve got a 2003 verve.
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Sim
PostPosted: Tue Nov 08, 2016 4:20 pm Up
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My 2.0 HDi ran around with a shot MAF without me knowing (so probably equivalent to when you unplug yours)

During extra 30bhp remap pro_steve from HDI-tuning said that I have to get that sorted, as map needs it.
He said car was driving fine because ECU comes up with failsafe default values, and it's perfectly OK for emissions with factory's engine tune and in this climate.

So why can't you just pass your MOT with MAF unplugged? Smile All my MOTs were in January, pass with flying colours seemingly with shot MAF too Very Happy

2.0 HDi, year 2000 (E's restin')
Red GTi 180, year 2004 (VorTechS' sEXy Beast (being) remasteRed)
Blue GTi 180, year 2004 (in hibernation after endless driving fun in 2019, queued for "cambelt in tight spaces")
Missus' 1.6 16v CC, year 2007 (L-plates to P-plates to NO-plates, but now she wants powwer:))
£50 1.4 HDi, year 2002 (seatless transporter, SORNed, rust needs patching)
EV
Jag S(crapped)- & X-Type
GTC VXR (sold)
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gazza82
PostPosted: Wed Nov 09, 2016 4:22 pm Up
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Sim wrote:
So why can't you just pass your MOT with MAF unplugged? Smile All my MOTs were in January, pass with flying colours seemingly with shot MAF too Very Happy

If the engine management light is on, it will fail.

woody1982-1: fit a new MAF ?

Down to just the 1.4 HDi. Cayman Green 2.0i CC sold.
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Sim
PostPosted: Wed Nov 09, 2016 6:01 pm Up
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gazza82 wrote:
Sim wrote:
So why can't you just pass your MOT with MAF unplugged? Smile All my MOTs were in January, pass with flying colours seemingly with shot MAF too Very Happy

If the engine management light is on, it will fail.

You're right, if EML sniffs some emissions problem.

Official response:
 


I funnily came across myriad of debates online where people think any time EML is on it's a definite MOT fail, but that ain't right Smile

From the same webpage mattersoftesting.blog....t-testers/ :
Quote::
When testing SRS MIL (Malfunction Indicator Light) lamps we are only looking to see if the lamp indicates if there is a fault with the system. If no lamp is present or it doesn’t illuminate then it can’t indicate a system fault, so it can’t be failed. Some vehicles may also incorporate warning messages on dash board displays; these are in addition to any MIL lamps and should not be used as a reason for rejection.

Also ABS lamp lit is a fail, but EML is not safety feature, therefore only advisory.

2.0 HDi, year 2000 (E's restin')
Red GTi 180, year 2004 (VorTechS' sEXy Beast (being) remasteRed)
Blue GTi 180, year 2004 (in hibernation after endless driving fun in 2019, queued for "cambelt in tight spaces")
Missus' 1.6 16v CC, year 2007 (L-plates to P-plates to NO-plates, but now she wants powwer:))
£50 1.4 HDi, year 2002 (seatless transporter, SORNed, rust needs patching)
EV
Jag S(crapped)- & X-Type
GTC VXR (sold)
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