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YOUR RESEARCH02 Boxster engine misfires, stalls, and shuts off! help ! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Install 90 miles ago) here is the whole story
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Reported fix · Original poster
"PROBLEM FIXED" Hello my friends, as I stated on the tile I am having major problems with my 02 boxster, it is a base model with 160k miles, de-snorkled, and K&N filter(installed 90 miles ago) Here is the whole story:
02 Boxster engine misfires, stalls, and shuts off! help ! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Install 90 miles ago) here is the whole story' (1 discussions report resolution; 0 report an unsuccessful attempt). Across 1 matching discussions, the most frequently mentioned possible cause is 'maf the cause of my issues' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Install 90 miles ago) here is the whole story' (1 discussions). For that action, 1 discussions report a resolution and 0 report an unsuccessful attempt. The most frequently reported fix is 'Install 90 miles ago) here is the whole story', supported by resolution reports in 1 discussions. 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.
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1
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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
I have an update, I disconnected the MAF again but this time I disconnected the battery to reset the ECU.
02 Boxster engine misfires, stalls, and shuts off! help ! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Disconnect mass air flow sensor
Performed · outcome unconfirmed
No successful repair reported for this finding.
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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
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
I disconnected the MAF then started the car and it runs the exact same way as with the MAF connected, there was no noticeable difference and it would still misfire, stall, and shut off.
02 Boxster engine misfires, stalls, and shuts off! help ! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
maf the cause of my issues
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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.
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Suspected cause · Original poster
I'll let you guys know if it was the MAF the cause of my issues.
02 Boxster engine misfires, stalls, and shuts off! help ! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check debris
Suggestion or failed attempt
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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.
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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 always check for debris when I pull the filter out, and run a vacuum around the housing.
02 Boxster engine misfires, stalls, and shuts off! help ! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (10)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Install 90 miles ago) here is the whole story
1
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report a fix
1
1 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.
Reported fix · Original poster
"PROBLEM FIXED" Hello my friends, as I stated on the tile I am having major problems with my 02 boxster, it is a base model with 160k miles, de-snorkled, and K&N filter(installed 90 miles ago) Here is the whole story:
02 Boxster engine misfires, stalls, and shuts off! help ! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Clean mass air flow 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
A few weeks ago the after I installed the K&N the car started stalling and it would shut off by itself, I took the MAF out and cleaned it with MAF cleaner which worked great because the car stopped shaking.
02 Boxster engine misfires, stalls, and shuts off! help ! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Disconnect maf the computer defaults
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Suggestion
actually, if you disconnect the maf the computer defaults to throttle position instead of airflow to establish fuel delivery and the engine should run fine.
02 Boxster engine misfires, stalls, and shuts off! help ! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Disconnect maf)
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
that's what I was hoping to hear, I did the same process today (starting the car and disconnecting the maf) and for about 3 seconds the car seems a little stable and then it goes to hell again, but the exact same thing happens once I plug the MAF back in, for about 3 sounds it calms down and then all the shaking and backfiring starts.
02 Boxster engine misfires, stalls, and shuts off! help ! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Disconnect mass air flow sensor
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
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
I disconnected the MAF then started the car and it runs the exact same way as with the MAF connected, there was no noticeable difference and it would still misfire, stall, and shut off.
02 Boxster engine misfires, stalls, and shuts off! help ! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Actions with reported resolution accounts (1)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Install 90 miles ago) here is the whole story
1
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report a fix
1
1 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.
Reported fix · Original poster
"PROBLEM FIXED" Hello my friends, as I stated on the tile I am having major problems with my 02 boxster, it is a base model with 160k miles, de-snorkled, and K&N filter(installed 90 miles ago) Here is the whole story:
02 Boxster engine misfires, stalls, and shuts off! help ! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Coverage and how to read this overview
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.
16 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 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
PROBLEM FIXED" I took the TB and plenum out and i found a cigarette bud stuck on the TB'S butterfly.
"PROBLEM FIXED" Hello my friends, as I stated on the tile I am having major problems with my 02 boxster, it is a base model with 160k miles, de-snorkled, and K&N filter(installed 90 miles ago) Here is the whole story:
A few weeks ago the after I installed the K&N the car started stalling and it would shut off by itself, I took the MAF out and cleaned it with MAF cleaner which worked great because the car stopped shaking. A week later the car felt slower so I hit the gas to see if I felt a huge difference in power and about 6800 rpm the engine completely stalled and all the pilots appeared on the dash but disappeared in a few seconds. After that, the engine was shaking and stalling like crazy, when I hit the gas it would start to backfire through the intake and then it would just shut off. I tried cleaning the maf again but with no luck. The car does the same thing everytime and it is imposible to rev it over 2k rmp without the car shutting itself after a few intake backfires. The car doesn't has the "check engine" or cel light on. I disconnected the MAF then started the car and it runs the exact same way as with the MAF connected, there was no noticeable difference and it would still misfire, stall, and shut off.
My question is, if the MAF failed, would the CEL light come on? could the MAF be the cause of the engine misfire and the intake backfire?
I also read that it could be the coil pack, fuel filter, an intake leak, timing chain tensioner failure, or the timing being way off.
If you guys have any guidance to narrow my search it would be greatly appreciated, I was thinking on going ahead and buying a new MAF but the fact that the CEL hasn't come on makes me think that it might not be a MAF problem.
Thanks a lot for your time and have a great day !
Vinicio
p.s. (sorry for my english, I'm Italian and I'm still learning haha)
Benvenuto Vinicio,
From what I've heard a K&N with any excess oil in it can foul the MAF. CEL or no CEL if disconnecting the MAF has no affect on how the engine runs, then there is an issue with the MAF.
actually, if you disconnect the maf the computer defaults to throttle position instead of airflow to establish fuel delivery and the engine should run fine. so, if the engine continues to behave poorly with the maf disconnected then it is not a problem with the maf. perhaps millimax deserves a duh right back at 'em. so, either the air filter change is just a bad coincidence with the engine problem, or you accidentally dropped something in the intake while doing the change - cheeseburger, small tonka truck, bag of bolivian marching powder ...
Ok I will shoot you
Well to tell you the truth I didn't think all the stories about the k&n were true but right now I think It is a big possibility. It's just weird, I've been using k&n on my z4, my cobra, and my GT, and I've never had a problem with those. On the other hand, the engine is running so rough right now that is hard to believe it is just a faulty MAF, if you rev it close to 2k rmp it will back-fire and die, the car is not drivable right now, it won't move one meter without shutting off, it also seems like is becoming harder to start when I crank it. Anyways thanks for the input
thanks for your input my friend ! that's what I was hoping to hear, I did the same process today (starting the car and disconnecting the maf) and for about 3 seconds the car seems a little stable and then it goes to hell again, but the exact same thing happens once I plug the MAF back in, for about 3 sounds it calms down and then all the shaking and backfiring starts. Thanks again ! Ci vediamo !
I was very careful not to drop anything, while the maf was out I sealed the hole with tape just in case a squirell wanted to find a new hiding place haha what you say has a lot of logic, I'm going to try it again tomorrow and see if disconnecting the battery does something different, I just hope it is not the timing chain :S
I have an update, I disconnected the MAF again but this time I disconnected the battery to reset the ECU. There is a huge difference on how the car runs now, I was actually able to drive it and rev it passing 3k rmp without the car shutting off or the constant backfire(it did it a couple of times though) I bought the new MAF and should get to me by friday, I'll take the K&N filter out just in case, it is not worth the risk even though you can feel some performance gains. I'll let you guys know if it was the MAF the cause of my issues. Thanks everyone for your answers !
I don't recall you saying this specifically, but what codes is your car showing? You'll need to use a code reader that'll also read pending DTCs. If you didn't have the codes read, perhaps that should have been the first step.
However, not all problems will store a code. But at least, with a code, we can help you narrow down the problem.
PROBLEM FIXED" I took the TB and plenum out and i found a cigarette bud stuck on the TB'S butterfly. The TB was open all the time and that simulated a huge vacuum leak that made the engine run lean. Cleaned everything out and it runs very good now. thanks everyone for your help !
A cigarette butt ???? Did I really read this ??? How in the hell did a "butt" get in the system ???? I think I know but want to hear from you all. Have not had my first Martini....YET.
It's likely that the cigarette butt was sitting on the filter when he pulled the old one out. It dropped down into the housing in the area below the filter, where the intake is. There should be a small screen on the intake to keep the big objects out, but it could have slipped past.
I always check for debris when I pull the filter out, and run a vacuum around the housing.
