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YOUR RESEARCHHelp with 01 911 Carrera 4 I just purchased
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Reported cause
Find out whether Durametric or which other diagnostic equipment is proven to be able to read the PSM/ABS associated trouble diagnostic codes prior to buying.
Leading evidence: 'able' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'able' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check engine' (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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Suggestion
a full tuneup and a mass air flow sensor should help idle and possibly the check engine
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Suggestion
High idle and rough running could be a vacuum leak, pull your oil fill tube cap while engine running to see if anything changes as the oil fill tubes are notorious for vacuum leaks, particularly at the accordion section.
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Suggestion
But I've seen people here spend that much on a perfectly fine running car just to make themselves feel better.
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Suggestion · Original poster
Right now shes running super rough, at times falling under 1k while idling.
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Suggestion
High idle and rough running could be a vacuum leak, pull your oil fill tube cap while engine running to see if anything changes as the oil fill tubes are notorious for vacuum leaks, particularly at the accordion section.
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Suggestion
I am sure other folks will chime in, but tires/alignment ran me about $1200 (not M-Pilots, mind you) and new coolant tank is in the same area (using genuine parts).
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able
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that report identifying 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.
Reported cause
Find out whether Durametric or which other diagnostic equipment is proven to be able to read the PSM/ABS associated trouble diagnostic codes prior to buying.
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.
24 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.
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Hello everyone,
I just bought this beautiful 2001 yellow 911 but it needs alot of work to get her where she deserves to be. Right now shes running super rough, at times falling under 1k while idling. I plan on doing a full tune up ASAP. The brakes are also shot and also need a full service. Theres also the dash lighting up like an xmas tree. Im hoping the tune up and brake service correct the bulk of them. Anything else i should be looking at? Im concerned about the PSM off light, i couldnt switch it back on through the toggle button. Hoping i didnt get in over my head with this project. Give me some good news fellas. Lol. Any input is appreciated.
Thanks in advance
First beautiful car great luck with her
a full tuneup and a mass air flow sensor should help idle and possibly the check engine
go to a local Porsche meet and find a good tech through them
Congrats!
Don't do anything until you do a full diagnostic scan off the car. Note or print the output, then clear the codes, drive the car and see what comes back.
Throwing plugs and an air filter at this car isn't going to get you anywhere.
Good luck!
BTW, normal idle should be somewhere around 750 to 800 rpm. High idle and rough running could be a vacuum leak, pull your oil fill tube cap while engine running to see if anything changes as the oil fill tubes are notorious for vacuum leaks, particularly at the accordion section. Also, ensure the throttle body rubber sleeves which connect it to the intake plenums on each side are tight, there are 4 screw clamps, one on each side front and rear. You may want to consider a smoke test to positively identify vacuum leaks. Beauty car, I dig the color.
Should we assume you didn't have a pre purchase inspection done before buying ? Hopefully you didn't buy someone else's headache . But everything can be fixed . Find a good local independent shop and start a relationship . Ask lots of questions here there are some smart folks on this forum .
Your assumptions are correct. I took my more mechanically inclined friend with me that helped verify all the electronics are good and some other basic stuff. But he's no Porsche specialist by any means. Im hoping i didnt buy a headache either, but also feel like i got a pretty good deal on a running version of the car. I drove it across town and made it home in 1 piece. Finding a good shop is definitely high on my to do list.
Well, I went to autozone and picked up a cheap OBD2 reader while I wait for the other one to come in and I couldn't pull any codes with it. I don't know if the reader just sucked or if the input is bad. Womp womp
You have a vacuum leak somewhere between MAF and intake valves. The extra air let's idle revs climb till they hit 1000 rpm which is (at engine operating temp) the fuel cut-off rpm when throttle is closed. Engine rpm drops, fuel injection is resumed and revs rise again till 1k. This cycle is repeated till you open the throttle just a little and the throttle position sensor indicates off-idle/part throttle and fuel is no longer cut off.
Use case for fuel cut-off is when slowing down/ braking. As soon as revs reach close to idle rpm then fuel injection is resumed in order to have the engine idle come a full stop or clutch action.
Get the engine smoke tested and seal all leaks you find.
Wrt to PSM light: if the ABS light stays on too then chances are any of the wheel speeds are not detected.
If it's only the PSM light then it will not be wheel speed signal related but PSM-specific.
Find out whether Durametric or which other diagnostic equipment is proven to be able to read the PSM/ABS associated trouble diagnostic codes prior to buying.
Got the quote back from the mechanic on everything. it's running fine now, it was MAF and other vacuum hoses missing. The ignition switch was also fixed. That was the least of it.
Now I'm getting full replacement of the front rotors, new tires, wheel alignment, 120k service done on the tranny and motor, coolant tank repairs.
Total for all repairs and service: $9k
I'm no expert but seems a little steep to me, unless I am missing something major. I am sure other folks will chime in, but tires/alignment ran me about $1200 (not M-Pilots, mind you) and new coolant tank is in the same area (using genuine parts). Brakes? Also not a huge ticket item. Beautiful car though, and hope you enjoy the heck outta it!
I took the car to a porsche performance mechanic shop, they exclusively work on porsches. So I know I'm overpaying some, but I'm relying on their expertise to hopefully get it right the 1st time. They went over the car top to bottom since I bought the car off a private buyer and the MAF was completely missing. They were able to find other missing items or misplaced parts in the engine. For example the power steering was overflowing cuz it had the wrong dipstick and was being over filled. As for the tires I went with the Michelin SP2s.
How much would you guys say im overpaying for all this expertise?
Hard to say as you didn't detail all the parts.
But I've seen people here spend that much on a perfectly fine running car just to make themselves feel better. You had something resurrected by people who seem to know what they are doing and should be able to back that up.
Enjoy it!!
Finally got her back from the shop running great. Sans the loud exhaust, but that's due to the cat delete the previous owner did. Don't mind the mess in the garage. Couldn't take any outside pix due to the weather.
Future upgrades list: New front bumper or front lip. Rear spoiler, possibly a duck tail.
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