20 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHHigh Idle
Leading reported evidence
Check freon
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
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.
Performed · outcome unconfirmed
Changed the blend door motor and checked the Freon.
Leading evidence: 'Check freon' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'cause of the vacuum leak' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check air oil separator' (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
Have the entire AC system flushed and re-filled with the proper amount of freon and oil.
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
Changed the blend door motor and checked the Freon.
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 suspect a cause
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 suspect a cause
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.
20 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: 20261026T152433Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Obviously.
So tempting to leave it at that, giving you as little information as you gave us. What year is your car? When did it start, did you do any work on the car, how high is high, is it rough, or just high, any leaks, smells, sounds, smoke, etc? any CEL? Does it run okay at higher rpms?
Have you looked in the engine at all? Did you do any troubleshooting?
Well, it�s a 2002 C4. I have a generic reader that I use to clear all codes. It runs fine for a awhile. The rpm�s slowly increase as I drive to around 1700. No oil leaks smoke , or anything else. Been doing this since last year. I�ve put a new MAP sensor on it last year because it was running a little rough. It�s just high idle now. Is this a common thing? Does it usually happen in a certain area I can look? I have other issues I�m trying to fix also. The climate control throws heat but not ac. Changed the blend door motor and checked the Freon. All good. Every once in a while it blows cold for a minute then goes hot. Any ideas here? Thank you for input.
First thing...do an Egas calibration. Turn ignition key to ON (not START). Do not touch the accelerator pedal. Wait 60 seconds with key in the ON position. Turn ignition key OFF. This will re-calibrate the Egas throttle body. How did you check your freon? Take your car to an AC expert (or maybe a Porsche dealership shop). Have the entire AC system flushed and re-filled with the proper amount of freon and oil. .This truly is a specialist job. You say you clear codes. What codes?
The guys asked some good questions and gave some thoughts.
What do the codes say? Did you use an OEM MAF sensor? Did you try to reset the throttle? Is it only at idle when you first start the car when cold or also when hot after its warmed up? Out of curiosity, have you removed the oil cap while the car is idling and if so what happens?
See if you can answer these questions and I am sure we can give you more to help direct you.
Also, don't be shy about the service history of the car. All info helps. Member like the info.
It only idles when its cold or I clear code. Warm or cold. I can't remember the code # as I was fighting it last fall before I stored it. I just got it out last week and drove for a little. Had no codes but a high idle when I shut it down. You mentioned oil cap. Couple years ago the filler tube cracked. I siliconed it up the best I could and ordered a new one. Haven't put it on yet as I have a supercharger on it and it is going to be a time consuming project. Maybe That is where my vacuum leak is?
You need to address one issue at a time. Fix the oil filler pipe. Probably the cause of the vacuum leak. Next time you get a code, write it down. Did you do the Egas calibration? Next, run the engine and leave the AC off. Then, while watching the AC compressor in the engine bay, turn the AC on and see if the compressor engages. The electromagnetic clutch should engage. Have you checked fuses and relays for the AC circuit? You've got some work to do.
Mark,
You just added another dimension with a supercharger. Best advice I can give you is that you have a 20 year old car. Because of this, everyone one of your plastic and rubber parts on the car are slowly deteriorating. You may want to consider focusing on the plastic/rubber engine parts first, including replacing your oil filler tube asap. If you still have a vacuum leak, you should check your Aos. What makes this tough is that you don't answer the questions and those that you do answer have only bits and pieces of info. My suggestion is that you go thru this thread and and fully answer the questions and tell us about your car. No worries if you don't want too, but it makes it very difficult for us to help you. And we all want to help in some way.
Best of luck.
The problem is I don't know. I have had this car for 3 years now probably put 1000 miles on it. I have a few bugs that I need to fix. I was hoping some of these bugs were very common so there would be an easy answer. That's all.
3 yrs. and 1000 mi. That pretty much says it all� Did you have the supercharger put on it, or did you buy it that way? If you bought it that way, did it idle properly when you bought it? It�s difficult to troubleshoot anything without a baseline for comparison. As mentioned earlier, superchargers are pretty rare on the M96 - my Tec would be to call the manufacturer and see if they have any installers/specialists in your area� good luck
Truer words have never been spoken. Mods can be amazing when they are working right and downright infuriating when you are having issues. I have spent countless hours chasing electrical gremlins related to mods on my 951, and the instructions for all of those mods have been a life saver. First thing I would recommend, if you haven't already, is get your hands on the install instructions or at the very least do some research on the specific brand/kit to familiarize yourself with the mods and then go from there, or as dporto said find a shop familiar with the mods.
This is a source reference. Confirm exact model applicability in the original material.
