Member Since: 24 Jan 2022
Location: Broadstairs
Posts: 32
MAF sensor readings 2.7 tdv6
Im trying to diagnose a rough idle ive had all 6 injectors tested and replaced 3 faulty ones.
But the problem persists it will start up fine with no rough idle once its been running for a few minutes it will start to run a little lumpy (nothing horrendous but noticable) once its warm no problems at all
Looking at some live values on my icarsoft vr2.0 tool the mass air flow sensor a signal frequency does no alter from 4g/s through any rev range in gear or out of gear. Has anyone had any experience with this not sure if its the tool or maf at fault. There arent any logged codes regarding the MAF
Thanks
Sam
12th Mar 2022 3:52 pm
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459
Could be the oil temp sensor in the sump its a known cause of rough idleAndrew
D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE
12th Mar 2022 3:59 pm
Samj89
Member Since: 24 Jan 2022
Location: Broadstairs
Posts: 32
Would it still do this if its showing the correct temp do you think?
12th Mar 2022 4:09 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4696
Re: MAF sensor readings 2.7 tdv6
Samj89 wrote:
Looking at some live values on my icarsoft vr2.0 tool the mass air flow sensor a signal frequency does no alter from 4g/s through any rev range in gear or out of gear. Has anyone had any experience with this not sure if its the tool or maf at fault. There arent any logged codes regarding the MAF
Thanks
Sam
That's way too low it should be up at around 15g/s at idle. Disconnect it and the PCM will adopt a default value for it, then see if that improves things!
If it doesn't improve the problem lies elsewhere.yµ (idµ - eAµ) ψ=mψ
12th Mar 2022 4:11 pm
Samj89
Member Since: 24 Jan 2022
Location: Broadstairs
Posts: 32
Im wondering if its that my code reader is just not reading that love value correctly going to borrow a friends one and see what that shows
12th Mar 2022 5:21 pm
huski
Member Since: 15 May 2021
Location: Hoedspruit
Posts: 3
Hi Sam, did you ever get to the bottom of the MAF issue. I have a similar problem, changed the MAF, but no change in the readings of 4g/s. Any help would be greatly appreciated. Grant
28th Feb 2023 2:39 pm
Samj89
Member Since: 24 Jan 2022
Location: Broadstairs
Posts: 32
Hi although my injectors had been tested they were still faulty replaced the faulty ones and it was ok after that. Sold it shortly after as was becoming a money pit so i bought something Japanese
28th Feb 2023 4:39 pm
huski
Member Since: 15 May 2021
Location: Hoedspruit
Posts: 3
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