5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHIdle problems
Leading reported evidence
Check intake/vacuum leaks
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
So far I have replaced the spark plugs, coolant level sensor, carbon canister (CEL was on for it previously), evap purge valve, MAF, and had it checked for vacuum leaks.
Leading evidence: 'Check intake/vacuum leaks' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check intake/vacuum leaks' (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
my 04 used to run rough jumping revs up and down, I cleaned the throttle body but it didnt help.
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
I have a new MAF, o2 sensors, spark plugs, coil packs, air filter, serp belt, coolant flush, recently pulled my tranny, inspected and replaced my IMS bearing and rear main seal.
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
I find it runs a little better with fresh oil, also I changed the oil I use and it seems a little better as well.
Replace spark plugs, coolant level sensor, carbon canister (cel was
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
So far I have replaced the spark plugs, coolant level sensor, carbon canister (CEL was on for it previously), evap purge valve, MAF, and had it checked for vacuum leaks.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check intake/vacuum leaks
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
So far I have replaced the spark plugs, coolant level sensor, carbon canister (CEL was on for it previously), evap purge valve, MAF, and had it checked for vacuum leaks.
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
I have a new MAF, o2 sensors, spark plugs, coil packs, air filter, serp belt, coolant flush, recently pulled my tranny, inspected and replaced my IMS bearing and rear main seal.
Replace spark plugs, coolant level sensor, carbon canister (cel was
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
So far I have replaced the spark plugs, coolant level sensor, carbon canister (CEL was on for it previously), evap purge valve, MAF, and had it checked for vacuum leaks.
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.
5 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: 20261026T183130Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I have been having idle problems with the car for a few months now. The rpms' jump up and down and the car occasionally stalls out upon start up (the car never stalls while driving). The stalling when I try to start it only seems to happen when the engine is warm, not when I first start up the car for the day. The engine also seems to run a little hot which I don't know if it's related but thought I'd mention.
There are no codes / cels on. The car does have a K&N cone air intake which came with the car. The car drives fine, acceleration seems good, and gas mileage seems normal.
So far I have replaced the spark plugs, coolant level sensor, carbon canister (CEL was on for it previously), evap purge valve, MAF, and had it checked for vacuum leaks.
Any other possibilites you guys think might be the cause? O2 sensors, fuel filter, something emissions related?
Thanks
When I start my 02 C4s cold its high idle is about 1100rpm. it will dip once or twice down to 700rpm before jumping to 1200rpm and settling out at 1100rpm again. I took a video of it posted it in a few forums, but have got nothing conclusive. It seems to be common with no solution found for the most part. I have a Porsche Scan tool, I have no codes, soft, hard, current or stored. I have a new MAF, o2 sensors, spark plugs, coil packs, air filter, serp belt, coolant flush, recently pulled my tranny, inspected and replaced my IMS bearing and rear main seal. AKA I have done pretty well all possible general maint. I bought my car at 40,000km and it is currently at 104,000km and it has done it since I have taken possession of the car. I find it runs a little better with fresh oil, also I changed the oil I use and it seems a little better as well. I was a mobil 1 feind but switched to Liquimoly Toptech 5400 5w40 oil which meets porsche specifications.
my 04 used to run rough jumping revs up and down, I cleaned the throttle body but it didnt help. it was under warranty so the dealer looked into it, struggled to diagnose the issue and in the end replaced the throttle body. Idles perfectly smooth at just below 800 rpm now
ok. I was thinking of getting the throttle body cleaned. That was my next course of action. The car is a 2001 with 71,000 miles on it. I wasn't sure if the k&N might be causing any issues with airflow or metering but these seem to be a pretty common mod for most people and the actual filter is brand new.
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