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When I do the camshaft position sensor Ill also remove the lower camshaft rubber plug and check/repeat the timing process just incase. |
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Hoping the Cam position sensor is the issue:) Keep us posted I always like to hear results. |
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edit! I just ordered a new crankcase breather hose and 4mm silicone hoses with a bunch of 3/16 fittings, once they come In I will replace all of the skinny little vacuum hoses, then put the car back together and check timing. If even after that It still runs bad i will report back on deviations etc, Im just wondering, if it was an air leak why would the car put a p1341 instead of... maybe an air leak code!!! darn it porsche you are driving me insane |
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Did you get any codes?? I think there is a diagram of the SAI here on the forum. Should be able to find it using search. |
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If you have access will doing the other work you should check that entire SAI system over. There is an Air change over valve, a electric vacuum switching valve, a non return valve, and a vacuum reservoir. an issue with anyone of them and you have constant SAI related codes. Keep us posted;) |
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So what does that leave me at? |
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Does it come back? Has Camshaft Deviation on bank 1 changed from the previous 19 degrees???? |
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the car runs good at 1,000 rpm and above |
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If the P1341 code does not come back then the timing issue is most likely resolved. If you get the P1341 code again and Cam deviation is out of range then you still have a timing issue. If the Camshaft deviations are good and no return of the P1341 code then you need to start looking at the lumpy idle issue. Could be a MAF issue or vacuum leak issue. Looking at O2sensor signals and short and long term fuel trims are a means to tell if it is a vacuum leak or a bad MAF. Go to Youtube and look up ScannerDanner find his videos on identifying Vacuum leaks using fuel trims. also his vids on MAF sensors. From those vids you will see how to use your Durametric to test to see if you have a vacuum leak or a bad MAF. Seeing him do it will be better then me trying to explain it. There a number of various valves and hoses along with carbon canister and vacuum canister under vacuum in both the Secondary Air Injection system and the Evap system. From the way you describe your lumpy idle issue (as if the issue is being triggered after warmup). My guess is your problem is in the Evap system or Secondary Air Injection system. Vacuum leaks often don't happen in those systems until a valve is actuated then the vacuum leak occurs. (Sounds like your issue). Because of this Vacuum leaks in these systems can be hard to find because thy don't always show up with something like a smoke test. So you have to go over each system step by step. Part by part. Hope this is of some help. |
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I don't know if this is related but ever since I got the car not only its fuel economy is absolutely horrendous, every time i put gas in it it doesn't want to start right after at the fuel station and I have to floor it while finessing it to get it to run, after its fine though. |
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Now that I have that information I believe your lumpy idle is also related to an issue with the EVAP system. Not sure of the exact layout but there should be a main vacuum hose to the EVAP system connected to your intake. Find that main hose then pinch it off and see if your lumpy idle changes. you can also hook up your Durametric and watch your fuel trims and O2 signals. If you have a vacuum leak in the EVAP system you will be showing positive fuel trims and low voltage from your O2 sensors. When you pinch off the hose your fuel trims will change as well as your O2 signals. O2 voltage will start to increase and then switch normally. fuel trims will slowly come down. If there does prove to be an issue with the EVAP system start with the purge valve and work from there. Your Camshaft deviation is also still an issue sorry to say. My guess is that much deviation is directly related to the poor fuel economy. fuel trims on bank 1 are probably always at near max positive no matter the RPM range. Just a guess on my part concerning fuel economy. |
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The missfires are due to the Camshaft Deviation being so far out of spec. As to the Camshaft Deviation I would try to fix that first. Seems like you are a tooth off or a link off in your set up. Your actuators for the Variocam system seem to be working ok now as when you rev to 3000 RPM you get a change of 25 degrees of actual cam angle. So that is right on spec. So it is a timing issue, not an actuator issue. I would Concentrate on getting the Camshaft deviation correct on bank 1. because you have The Camshaft Deviation numbers to view that tell you if it is fixed or not. Then the other issues will be easier to find and correct. Yes the issue with not starting after refill is caused by a problem with the EVAP system. I believe your EVAP issue is also "part" of your lumpy idle issue. |
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this is going to sound stupid but I went and the ims locking tool fit really good on the notch in the cam so I dont really know how the timing could be that far off... nevertheless it clearly is, should i adjust the camshaft a little bit clockwise or counter clockwise based on my current deviations to correct it? |
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Go to the thread titled " Vario cam issues" on post 48 on the second page you will see a picture of the cams. If you look close you will see the timing mark on each cam and you will be able to count six links between the timing marks. Are you positive there are six links between cam timing marks????? A link off is all I can think to be your issue as everything else seems ok. If your tool just locks into one cam the only way you know the other cam is right is to have the proper number of chain links between them. |
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So I would think advanced would be positive and retarded negative. I just did a little reading on how the cam timing is set up on these engines. I see where your going with the attempt to "adjust the cams, makes sense. If your cams have the four bolt setup on the sprocket, timing could have "slipped there at some point. You just have to figure out which direction to go. Keep us posted on the results. |
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wow this car really doesn't want to work :/ |
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