15 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHSudden random misfires!
Leading reported evidence
Clean maf sensor and icv (
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
Yesterday I cleaned the MAF sensor and ICV (using proper MAF cleaner).
Leading evidence: 'Clean maf sensor and icv (' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check light came' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
It was on my list of things to do after buying the car, picked up from all sorts of places - somebody had said once they cleaned the MAF the idle after startup was much better (mine was a bit lumpy, but I know that's probably normal).
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
it was running perfectly 2 days ago, and started misfiring on 4 of the cylinders 4 hours after I replaced the MAF after cleaning it (and not letting it dry properly)!
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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
Today I started the car (it's been sat for a few days) and the engine check light came on ...
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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.
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
It was on my list of things to do after buying the car, picked up from all sorts of places - somebody had said once they cleaned the MAF the idle after startup was much better (mine was a bit lumpy, but I know that's probably normal).
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
it was running perfectly 2 days ago, and started misfiring on 4 of the cylinders 4 hours after I replaced the MAF after cleaning it (and not letting it dry properly)!
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
Wasn't aware of the throttle reset procedure though, thats great info - is that something thats recommended to be done regularly or just if you experience similar problems to the OP?
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
it was running perfectly 2 days ago, and started misfiring on 4 of the cylinders 4 hours after I replaced the MAF after cleaning it (and not letting it dry properly)!
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.
15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T183130Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Yesterday I cleaned the MAF sensor and ICV (using proper MAF cleaner). Today I started the car (it's been sat for a few days) and the engine check light came on ... OBC reader showed random misfires (cyls 1,3,4,and 6)!!
The car was running perfectly previously, so I'm going to assume that these things are (hopefully) related. I only drove it for a couple of minutes, as I wanted to get back tot my garage as soon as I saw the light!
Any ideas? If I'd have driven it for a while do you think it would have cleared itself?
It was on my list of things to do after buying the car, picked up from all sorts of places - somebody had said once they cleaned the MAF the idle after startup was much better (mine was a bit lumpy, but I know that's probably normal). I didn't think it could do any harm provided I used the correct cleaner (Moly MAF cleaner).
I have a feeling it's because I didn't allow sufficient drying time before I put it ll back together -- I mean it was literally a couple of minutes, but I've just realised it needs to dry for at least 30!! Hopefully I've not caused any serious damage, so I'll take it apart, clean it again and leave it for 24 hours before reassembly
I get that, something i've always done to new cars too.... did it to my 996 too.
Have you tried the throttle body reset procedure..? Open the drivers door, leave it open, open engine cover and leave open, put key in ignition at pos 1 for 60 seconds, turn ignition off for 15 seconds then start car.
YOU MUST LEAVE THE DRIVERS DOOR AND LID OPEN... you'll hear recab noises.
Worth a try, or disconnect and reconnect the maf until it clicks.
when i've had misfire codes in previous cars, the coil packs are the usual suspects
Wasn't aware of the throttle reset procedure though, thats great info - is that something thats recommended to be done regularly or just if you experience similar problems to the OP?
I'd be surprised if it's coil packs ... it was running perfectly 2 days ago, and started misfiring on 4 of the cylinders 4 hours after I replaced the MAF after cleaning it (and not letting it dry properly)!
