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By hugo kohl
1999, 996, 117k miles
Due to leaking I recently changed my coolant reservoir tank, which involved disconnecting and re connecting 2 fuel lines.. Upon restarting the car I had a rough idle and CEL. I purchased a $100b code reader, read a bunch of stuff online and decided to clean the MAF sensor, change the air filter, spark plugs, plug tubes and coils.
upon today's startup I get an erratic/rough/low rpm idle, flashing CEL and the following codes:
P0102 mass air flow circuit low
P1319 misfire emission related
P1318 misfire cylinder 6 emission related
P1315 misfire cylinder 3 emission related
P1313 misfire cylinder 1 emission related
Somehow I went from a leaky tank to some bad stuff based on a do-it-myself moment.
I wonder if the coil packs might not be perfectly seated?
I'm thinking a new mass air flow sensor and all four O2 sensors need replacing??
I took it to the shop and the car shows those system too lean in bank 1 and bank 2, do i have to replace anything?
The mechanic told me we should replace the coils in #4 and #5 because they are misfiring due to something.
Any ideas before i go buying new coils?
Well so i just noticed something weird. I parked the car after driving it for 15 to 20 mins and left it running while i went to get the mail, and when i come back I noticed that 3 out of the 4 pipes where smoking nicely but one was not quite as strong. I put my hand on the one that was not as strong as the others to make sure smoke was coming out, and notice the small amount of smoke coming out was cool! I then place my hand near the others and the smoke was hot as hell! What should I do, I am sure that is not normal! The car drives awesome, very strong, but i am sure that is not a good sign. The one all the way to the right is the problematic one.
i bought a durametric and i will run it and show the results here, but any idea will be appreciated.
The engine light comes on my 996 every so often, then goes off a few weeks later. I wasn't to concerned as the car drives well.
So I got round to plugging it into the Durametric to look at the fault codes....
I've got loads of codes, P1340, P1531, P0300, P0306, P0304, P0305, P1585, P1319, P1318, P 1316, P1317, P0301, P0303!
The car drives very nicely, loads of power and seems perfect when accelerating and driving. Feels perfect on the open road.
The issue I have is a "tapping" noise on the engine on idle and a slightly eratic idle - its not much, but its not perfect. It sounds a bit like my 1955 VW Beetle. I was running 5W oil, but also changed it to 10w a month ago, but the tapping noise is exactly the same. Car has done 96,000m.
So I'm keen to look at the codes and fix as many things as possible!
So today I removed the spark plug/Coil pack covers on both sides to remove a spark plug from each side, the idea was that I could inspect them and the coil packs to see if there old or visually worn out.
The plugs were NGK FGR6KQE 4 tipped plugs, with BERU coil packs all round. The plugs both looked great, normal grey/brown looking colours. The coil packs were dated Jan 2013 and visually looked clean and tidy. **I've owned the car about 18 months**. I was hoping the plugs may look old and I could just replace those to see if it improves, a fair £40 and Id get to spend some time hopefully improving the 996. I noticed that one of the middle "tubes" where the spark plug goes into was a bit wet with oil - the other two were dry. I see that its possible to buy new tubes for about £8 with the o-ring seals. The 3 tubes on the other side all looked dry, so just one that's seeping it seems.
I'll work my way through the list of codes, but if anyone has any advice on these codes id love to hear from you! I see one of them was for a fuel vent, so I'm hoping a couple of codes could be cheap fixes.
Rough idle + Code P0301after tensioner pad / camshaft work and what is correct " Actual angle for camshaft " spec?By Los996
This is a continuing repair to what started as a camshaft deviation out of spec leading to the replacement of the chain tensioner pads / brake pads / chain ramps on my 2000 911 - 996 5-Chain engine. Seen here:
That odyssey has since been resolved but I now have a new issue.
Removed camshafts, readjusted the camshaft chain timing "marker" positions, replaced tensioner pads, reassembled everything per factory specs.
On first start up got very rough idle and bad misfires. At first I thought it may have been my timing was off but went back and visually inspected all and all looked correct (visually). Upon further inspection realized parts guy had given me Bosch 7403 plugs instead of Bosch 7413 (2000 Porsche 911).
Switched out and installed the correct spark plugs and no more continuous misfires / backfires. Did the initial reset (wait 1 min with ignition on / turn ignition off / wait 10 sec) On the first start up it did misfired / back fired once but I assumed that was left over fuel.
Car now runs but very rough and threw 2 codes:
- P0300 : Porsche Fault code 62 - Misfire damaging cat. converter
- P0301 : Porsche fault code Cylinder 1 misfire damaging to cat. converter
Also, took these readings:
Actual angle for camshaft bank 1: -12.53
Actual angle for camshaft bank 2: 3.05
On positive note the main reason for doing all this work was the original problem / issue of tensioner / brake pad wear which was giving me a -10 / -2.92 reading is now:
Camshaft position 1 deviation: 0.00
Camshaft position 2 deviation: 0.00
So the question is now are the Actual angle for camshaft readings within specs and could incorrect timing be attributed to these new issues?
And... Do I have to give the DME time to "relearn"?