911uk

MAF sensor question

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4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

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YOUR RESEARCHMAF sensor question

Leading reported evidence

Check nil reported...regarding the maf sensor

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Unsuccessful attempts: 1
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Suggestion · Original poster
Have had the fault codes checked, nil reported...Regarding the MAF sensor cleaning is it the Bosche part bolted onto the air intake (square) or the one underneath (Rectangular)???Looked on Ebay could only find 993 MAF sensor...are there any simple tests to isolate the MAF sesnor as the culprit?
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MAF sensor question

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Leading evidence: 'Check nil reported...regarding the maf sensor' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check nil reported...regarding the maf sensor' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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Clean mass air flow sensor

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Suggestion
I know you can clean the MAF, but not 100% sure how to do this.
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MAF sensor question

Replace plugs

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Suggestion
I'd look at replacing the plugs, after a lean running period they are likely to be a little worn from the higher temperatures etc.
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MAF sensor question

Run period they are likely

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Suggestion
I'd look at replacing the plugs, after a lean running period they are likely to be a little worn from the higher temperatures etc.
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MAF sensor question

Frequently discussed actions (4)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check nil reported...regarding the maf sensor

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
Have had the fault codes checked, nil reported...Regarding the MAF sensor cleaning is it the Bosche part bolted onto the air intake (square) or the one underneath (Rectangular)???Looked on Ebay could only find 993 MAF sensor...are there any simple tests to isolate the MAF sesnor as the culprit?
Original post Read captured discussion
MAF sensor question

Clean mass air flow sensor

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion
I know you can clean the MAF, but not 100% sure how to do this.
Original post Read captured discussion
MAF sensor question

Replace plugs

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
I'd look at replacing the plugs, after a lean running period they are likely to be a little worn from the higher temperatures etc.
Original post Read captured discussion
MAF sensor question

Run period they are likely

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
I'd look at replacing the plugs, after a lean running period they are likely to be a little worn from the higher temperatures etc.
Original post Read captured discussion
MAF sensor question

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Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

911uk: 1 discussions

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Generation: 20261027T051247Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Having periodic rough running and occassional backfire from the 3.4L...at other times sensational...been told could be the MAF...are there any checks before replacing this $1000 (400gbp)!!!! ? only to find out that "it isnt the MAF afterall, sir"...any other suggestions on likely causes/cures? This all started after the Oil filler neck split causing the motor to lean out.

POST 2Original post

I know you can clean the MAF, but not 100% sure how to do this. One of the other guys will know. ARe you losing a lot of power and is the check engine light on? If losing a lot of power then could be a coil pack.

POST 3Original post

Cleaning the MAF is a relatively easy task, a secure Torx will allow you to remove this easily. Alternatively you can remove the top of the airbox and hoses and clean it that way. You spray electronics cleaner onto the MAF sensor, let it dry and reassemble. I'd look at replacing the plugs, after a lean running period they are likely to be a little worn from the higher temperatures etc. As Chris says you might have a knackered coil-pack. A faulty MAF or coil-pack will register a fault in the ECU so get it along to a OPC or a specialist. Damian If you were in the UK I'd say check out eBay there's a new 3.4 MAF for £90.

POST 4 / ORIGINAL POSTEROriginal post

Cheers for the replies, Have had the fault codes checked, nil reported...Regarding the MAF sensor cleaning is it the Bosche part bolted onto the air intake (square) or the one underneath (Rectangular)???Looked on Ebay could only find 993 MAF sensor...are there any simple tests to isolate the MAF sesnor as the culprit?

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