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To remove or not to remove


Recommended Posts

That is the question...MY 1998 Boxster 2.5L manual transmission with 114k, is having a few issues. Out of the blue a couple of weeks ago it started to misfire as soon as I put it into 1st or reverser. Ran the codes came up with 300, 301, 302, 303, and 341. Started researching and of course it could be this and it could be that. Replaced the spark plugs, checked the coils and replaced the fuel and air filters. Started the car,same result, and ran the codes and same ones as above along with 1313,1314,1315, and 1319. still misfire codes with emission relevant codes. Replaced the O2 sensors(all of them) Same result again. More research, could be a camshaft position sensor on bank 1. replaced sensor, No help but it kick off more codes. All of the aforementioned plus 1340, 1397 and 0150.Now I'm beginning to think is a variocam actuator problem, which for me would mean that I need to pull the engine and replace. So back to my question...TO REMOVE OR NOT TO REMOVE? I'm I being too premature or is this where my problem is headed?Any advise is welcome.
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That is the question...MY 1998 Boxster 2.5L manual transmission with 114k, is having a few issues. Out of the blue a couple of weeks ago it started to misfire as soon as I put it into 1st or reverser. Ran the codes came up with 300, 301, 302, 303, and 341. Started researching and of course it could be this and it could be that. Replaced the spark plugs, checked the coils and replaced the fuel and air filters. Started the car,same result, and ran the codes and same ones as above along with 1313,1314,1315, and 1319. still misfire codes with emission relevant codes. Replaced the O2 sensors(all of them) Same result again. More research, could be a camshaft position sensor on bank 1. replaced sensor, No help but it kick off more codes. All of the aforementioned plus 1340, 1397 and 0150.Now I'm beginning to think is a variocam actuator problem, which for me would mean that I need to pull the engine and replace. So back to my question...TO REMOVE OR NOT TO REMOVE? I'm I being too premature or is this where my problem is headed?Any advise is welcome.

OK, this is going to be a bit complicated. You did not mention what type of scan tool was used, but P0341 is for an implausible signal from the cam position sensor on bank #1, it is not necessarily the sensor, but more commonly a break in the wiring or a short. P1313, 1314, and 1315 are not applicable codes to a 98 Boxster with a 5.2.2 DME. P1340 is for the cam position on bank #1 being out of position high. P1397 is for the cam position sensor on Bank #2 having an implausible signal or again a wiring break or short. P0150 is for the O2 sensor ahead of the three way on bank #2 having a wiring harness short or loose connector.

A this considered, it looks like you have a wiring problem. Suggest hooking the car up to either a Durametric system, PIWIS, or PST II and look at cam deviation values (read by the cam position sensors), the O2 sensor voltages, and can also activate the VarioCam system to make sure they are even involved in all this.

You also posted this in the wrong forum (this is the 996, not the 986 forum).

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