11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHhesitation
Leading reported evidence
Clean throttle body
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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
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
Work done - removed and cleaned throttle body, replaced plugs, fuel filter, fuel pump
Leading evidence: 'Clean throttle body' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check mass air flow 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.
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
Parts already replaced - fuel pump, fuel filter, spark plugs,
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
Work done - removed and cleaned throttle body, replaced plugs, fuel filter, fuel pump
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.
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.
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.
11 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.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T203514Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
In the am, when I start my car, she will start up and idle perfectly, but when I step on the gas, she will bog down, I can hear a slight popping in the engine compartment. If you keep your foot on the throttle, she will stall out. But if you feather the gas until you can move the idle up to around 2500 or 3000 the hesitation and bogging goes away and doesnt come back until you try to start the car. It happens only at initial start up.
Symptoms - bogging down at start up under throttle. slight backfire, hesitation, no check engine light
Parts already replaced - fuel pump, fuel filter, spark plugs,
Aftermarket parts - Headers, K&N cold air kit
Work done - removed and cleaned throttle body, replaced plugs, fuel filter, fuel pump
Any suggestions?
Jzzzake, just an observation but it would be helpful if you would post your car info, year, mileage, etc. I assume its some type of 996 or you wouldnt be here. It has a fuel filter you replaced so pre 2002? But, you also say fuel pump so who knows what year you have? Who did the work? When? Symptoms before work done? Stored code(s), may not show CEL?
From what you posted, my WAG is:
1.coil packs
2.other ignition problem
3.injector (doubtful)
4.MAF (more doubtful)
5.AOS (unlikely)
And, also IMHO, the K&N is a red flag, headers another red flag. Oops. Forgot, check for vacuum leaks too.
Backfire? Doesn't that indicate a wrong air/fuel mixture? Or maybe the timing is out somehow? Now I have no idea what controls those symtoms on these More modern cars but I could solve it on the old beetles in a flash haha. Then again altering the original to Aftermarket parts - Headers, K&N cold air kit, may effect the performance of the engine. Hell I don't know so I had best shut up. Hope you solve the problem. Are you using the top grade fuel?
How cold is the temp outside? My car will pull back also as I pull out of the driveway when it's cold outside. When it does I back off the throttle and its dime. Do not rev a cold engine in past 2500-3000 rpm's until the temp gauge gets up to the the 1st line on the gauge. I don't know what year your 911 is but mine is a 99 that first went into service in May of 1998. I go easy on it until the temp is up and then drive it normal. It's a teenager and I am determined to keep it for 6 more years, it will then be a 20 year old car.
The car is a 1999 C2. I live in Key West so the mornings are never less than 65 degrees. I did the work myself, as I own a shop here,there are no stored codes, no CEL, always run the best gas, cats and O2 sensors are still there, air pump comes on at start, MAF working prfectly.
