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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHIntalled a new MAF and got a bunch of misfire codes
Leading reported evidence
Install couple hundred miles
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Performed · outcome unconfirmed · Original poster
It's been running fine and It threw an 0420 the other day but I have 200 cell cats with 90 degree things installed for a couple hundred miles.
Intalled a new MAF and got a bunch of misfire codes
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Leading evidence: 'Install couple hundred miles' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect battery' (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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Intalled a new MAF and got a bunch of misfire codes
Disconnect battery
Suggestion or failed attempt
No successful repair reported for this finding.
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Unsuccessful attempts
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Suggestion
Installing a new one you need to reset the adaptations by disconnecting the battery.
Intalled a new MAF and got a bunch of misfire codes
Disconnect battery tho
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Intalled a new MAF and got a bunch of misfire codes
Replace maf sensor, and only
Suggestion or failed attempt
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.
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Suggestion
Yes, I've had to replace my MAF sensor, and only used a OE Porsche MAF sensor because the DME/ECU depends on the sensor to make the engine run right.
Intalled a new MAF and got a bunch of misfire codes
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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.
9 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261027T084359Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Installed a new NGK MAF sensor and got a bunch of misfire codes on start-up. It seemed to get better but I didn't let it run too long. Clearly the new sensor is providing different data to the ECU. My question is does that mean the old sensor was wrong and adjusted for? Is the new sensor wrong? I have always trusted NGK as a brand but IDK. It was likely too lean condition
What was your reason for replacing the MAF sensor? Only use an OE Porsche MAF sensor. I know they are expensive but that is really the only correct choice. Yes, I've had to replace my MAF sensor, and only used a OE Porsche MAF sensor because the DME/ECU depends on the sensor to make the engine run right. Anything other than that is a crap shoot...
The other thing is the DME/ECU adapts to the signals from the MAF sensor. Installing a new one you need to reset the adaptations by disconnecting the battery. The DME/ECU will reset to default values and then as you drive it adapts.
There has been a rash of posts in the last 6 months of multiple bad mafs or just aftermarket ones not jiving with our cars. One guy in a boxer has 3 in a row bad.
More info needed before I cast an opinion like year model, miles, history ,codes before and after, MAF part number ect......and even actual MAF and Fuel Trim values if you have them
It's been running fine and It threw an 0420 the other day but I have 200 cell cats with 90 degree things installed for a couple hundred miles. A couple people suggested I should try a MAF sensor and I was wanting to do that anyway because I imagine it's original with 90 k miles (2002). I thought I would try a NGK because I trust their products and bosch has hosed me with 02 sensors before on another vehicle. Anyway the codes were 300 302 305 etc. The part number is MG 0029 33519
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