9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHSpun into dirt, killed MAF?
Leading reported evidence
Check few things
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
In the cold cold pits my instructor (a Porsche mechanic) and I checked a few things but saw nothing, and there was no check-engine light, but when we unplugged the MAF the car ran fine.
Leading evidence: 'Check few things' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check few things' (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
Regarding cleaning the MAF, I tried that years ago and found it to be a temporary fix, so I replaced my MAF and haven't had a problem since.
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
Closing the loop: Replaced MAF sensor with new Bosch unit an all is well.
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
Will clean the K&N and try to be careful with the oil, although I'm still tempted to go with old fashioned paper--the K&N did catch an awful lot of dirt, did it's job, I guess.
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
Regarding cleaning the MAF, I tried that years ago and found it to be a temporary fix, so I replaced my MAF and haven't had a problem since.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check few things
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
In the cold cold pits my instructor (a Porsche mechanic) and I checked a few things but saw nothing, and there was no check-engine light, but when we unplugged the MAF the car ran fine.
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
Will clean the K&N and try to be careful with the oil, although I'm still tempted to go with old fashioned paper--the K&N did catch an awful lot of dirt, did it's job, I guess.
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.
9 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
I drove around the track a few more times but problem persisted.
Did my first ever DE event in my 2000 Carrera this weekend. Pushed a little too hard and slid off track into some dirt--a lot of dirt, everywhere. I didn't hit anything, or anyone, but the engine stopped. I had trouble getting it started but thought it was just nerves, but the car just wouldn't idle or run below about 1500 RPM. I drove around the track a few more times but problem persisted.
In the cold cold pits my instructor (a Porsche mechanic) and I checked a few things but saw nothing, and there was no check-engine light, but when we unplugged the MAF the car ran fine. Checked the K&N air filter in the factory airbox and it was REALLY dirty. Tried blowing out the filter, and using MAF cleaner on the MAF,nothing helped.
Plugged in my Durametric and it gives code P0102 (Porsche Code 115)- Mass Air Flow Sensor below limit value. Voltage is 1.06 at idle, stays very flat and never goes above 1.10 even under full throttle. Car will not idle or stay running under 1500 rpm. I am able to drive the car without the MAF plugged in, but the check engine light, of course, comes on.
My instructor thinks the K&N and it's oil, helped ruin the MAF--he thinks I should use a normal filter. Could it also have been overwhelmed and caked up by all that dirt which maybe caused a disruption in the air flow and ruined the MAF?
At any rate, should I just go ahead and replace the MAF, or is there another possible cause?
Many on Rennlist have indicated MAF issues due to over oiling the K&N filter. Regarding cleaning the MAF, I tried that years ago and found it to be a temporary fix, so I replaced my MAF and haven't had a problem since.
Thanks. Any search about replacing the MAF pretty much says to try checking everything but the MAF. I think this will do it, but I am always cautious when there is a catastrophic failure of a component with no signs ahead of time.
I posted a reference not so long time ago.
Your MAF sensor hot film values should read as in the table shown below.
Disregard the first part of the extract.
The closer to 1.0V with engine off the better. I would say 1.06V is still okay but you could notice the difference when installing a new one. I replaced mine with 1.03-1.04V as cleaning did not helped.
I think the 1.06V (1.1V) is ok per the table, but it stays there, even when the engine is idling or revving. No way it's going to reach 1.2V to 1.5V. Seems the MAF is dead. I am ordering a Bosch unit and hopefully that is it. Will clean the K&N and try to be careful with the oil, although I'm still tempted to go with old fashioned paper--the K&N did catch an awful lot of dirt, did it's job, I guess.
