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Recently I replace the Variocam Ramps on my 2002 boxster S.
Reassembly went well but I have a timing problem for the cams afterwards, trying to figure out the fix.
Bank one at Idle actual cam angle is about 6, deviation is blank.
Once the car warms up to 180, the actual angle goes to close to zero, and the deviation is about 5 to 6.
Bank 2 is as you would expect, actual angle around zero at cold idle, deviation around zero at warm idle.
My recollection is that before disassembly the Durametric showed that actual angle at idle when cold was close to zero On bank one.
I read that actual angle may not represent what I think it does, I read somewhere that it represents the amount of Variocam influence on the cams, not the actual timing.
Can someone possibly explain what the actual angle means? Bonus points if someone can explain to me what exactly is wrong with my car, my best guess is either I have a bad variocam actuator problem or I assembled things with intake cam one tooth off.
By Graeme Tate
I hate my pig but I love my pig, can anyone please help me before I send it for scrap. Over the space of the last 4 years of ownership my car has been in the Porsche dealers for 2 years in total with suspension problems, to cut a long story short this is now sorted and was due to a faulty replacement air bag being fitted. Moving on after 3 months of (almost) trouble free motoring this is what’s happening now and would love some advice as the closest porsche dealers is over 200 miles away from me.
When I picked up the car from Porsche it ran out of petrol before I got to the garage at the end of the road and although I filled it up it the engine warning light remained on I assumed this was just fuel related and drove home with it on and reset it when I got home.
Wind on a few weeks and the engine light came back on and gave me a camshaft position sensor error p0016 so I sent the car to my local Porsche mechanic who changed out the sensor and did a full service on the car including plugs filter oil etc etc. All this time the car has been running fine but as I wanted the sensor light out it was changed. However after changing it out the light came back on almost straight away. The car has been a bit sluggish to start sometimes and sometimes on pulling away from a stop has also been hesitant.
This was about 3-4 weeks ago and now it is worse again, at tickover it’s noisy, it doesn’t like acceleration and is running really rough although if you are going over 50mph it doesn’t have a problem and seems to run fine. The EML is now flashing rather than being a solid light. I attach a video of it running.
Any thoughts would be a help before I decide to get it hauled back across again
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By Christiaan Poortman
Hello, I'm new on this forum and stumbled upon a new problem (or old) with my 2.5l 986 Boxster from 1997.
The problem occurs when the engine is started dead cold after sitting a few hours/overnight.
Engine starts immediately but the RPMs start to surge / hunt between 1100 and 700 RPM. This continues for about 10 seconds after which the idle smoothes out to the normal cold idle RPM.
The first pull away requires a tad more throttle then normal to prevent stalling. After this first pull, everything is almost normal and engine performance becomes better and better. When the engine is hot, the idle sits at 780 RPM with a minor fluctuation now and then (seems to be more than normal)
I've been to two shops (official Porsche dealer and local Porsche specialist). Porsche dealer couldn't find anything and the specialist found the camshaft sensor on the left bank to be unplugged - but now comes the strange thing - the cabling is nowhere to be found!!!!!!? Took the car home to check myself but didn't find anything.
No camshaft related codes to be found in the diagnosis and no CEL either.
Attached one pic showing the sensor and it's missing plug
Could someone help me out? - Is it possible for the engine not to throw a CEL when sensor is disconnected? - where is the sensor wire to be found?
Just posted a docu. on my completed 02 996 M96 3.6 l engine rebuild for a gorgeous C4 cab barn find, I bough back in August 17 as roller with complete engine (Head&Case failure).
It is not about performance upgrades or how it should be done. Is about the process to get it done with very details on the critical steps for the hands-on engineer.
The car drives fantastic now, and if it breaks I will be confidently enough to spend the needed money and time to order on the new hard parts (Nickies, rods, heads, etc.... For now I did not spend anything other than on a high-mileage used 997.1 donor engine and a couple of 996 cases with paired pistons/rings from engines with other type of failures).
I wish I had an alike docu. when I started - so I share it here, and hopefully it is useful for someone who wants to bring a M96 996 3-chain engine back to life .