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Old 03-08-2013, 07:41 PM   #76
wrx1392
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Quote:
Originally Posted by TurboWRex05 View Post
I cleaned my crank position sensor a few weeks ago and I noticed on start ups that the car starts better. Instead of a sputtering start like it use to, it starts smooth, with a slight bit of stutter. I dont know if everyone else has the same problem, but low RPM from about 2300-3000 RPM, the car falls flat on its face it seems. I havent cleaned my camshaft sensor though. If one of the guru's could help explain the sensor system between the cam/crank sensors and how they effect timing, or even hesitation issues, I think we would all appreciate to know the benefits of keeping them clean. My WRX has 93K miles, so i figure its about time to do this.

these two sensors talk to each other ,if your belt goes bad or jumps a tooth it could trigger a p320 and p340 code. this happened on the wifes 4.6 merc V-8 .....the poor mech tried a bunch of stuff,cs ,wireing ,ecu finnaly he must have serched and found that the timing chain ,gears,guides,and tensioners were worn. when you read the code it says cam sensor "curcuit" malfunc. the word curcuit makes you think it is a wire issue ,but the c/s and c/p/s talk and when they get out of wack you get a code. car ran fine,just had a ck eng light for 2 years ,needed a smog so needed the light off. these sensor have to do with timing the spark to the plugs,and firing the fuel injectors.thats why you have the teeth on the crank pulley and the upper L/H cam gear is metal.
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Old 06-01-2013, 01:53 PM   #77
Ctelectrician
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Did anyone notice that their sensor was leaking oil? I'm not throwing any check engine lights and my car seems to be running fine but there is a build up of oil around and in the general area of the sensor. I would have thought the oil pressure sensor would be the one leaking but that is perfectly clean. Thanks
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Old 09-12-2013, 06:09 PM   #78
SpaceGhost
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I pulled and cleaned the wife's 2005 WRX crankshaft position sensor, I too did not have to remove the Alternator, took less than 5 min. (Many Ohio winters and 150k miles it came right out easy) Cleaned it with WD-40 and cotton pad from the wife to clean make up off her face. Fired right up. Remains to be seen if the car dies or throws the P0335 code.

Last edited by SpaceGhost; 09-12-2013 at 06:14 PM.
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Old 09-13-2013, 12:40 PM   #79
shamrock 05
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I want to check mine but I really dont want to remoce the alternator to do so.
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Old 09-17-2013, 02:38 PM   #80
RedImpreza07
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here is a pic of my sensor after 99k Car runs smooth now all through the rpm range
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Old 09-18-2013, 12:41 AM   #81
1 Lucky Texan
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Quote:
Originally Posted by RedImpreza07 View Post
here is a pic of my sensor after 99k Car runs smooth now all through the rpm range

so....cleaned it or replaced it?
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Old 09-18-2013, 08:13 AM   #82
shamrock 05
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How do you guys get to this without removing the alternator? It seems like the alt is right above it and in the way?.....Cause I want to clean mine as well.
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Old 09-18-2013, 11:46 AM   #83
Sudo
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I did mine with a 1/4 socket, extension, and universal joint. Was a pita but I got it. Oh yeah I removed a couple of molex connectors that were in the way.
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Old 09-18-2013, 01:49 PM   #84
absubie
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1/4 socket, short extension, and WD40 on the bolt a day in advance. Out and back in within 15 min. You just have to wiggle your arm in at an angle to access it. One of the easier things I have had to do. Mine was surprisingly not as dirty as I expected for 105k.
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Old 09-18-2013, 02:58 PM   #85
Piapix
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Thank You
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Old 09-21-2013, 01:04 PM   #86
RedImpreza07
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Quote:
Originally Posted by 1 Lucky Texan View Post
so....cleaned it or replaced it?
I had access to a brand new one for free so I changed it. It solved my slight stutter when accelerating. Car has 100k. Just did all the service so I did this while I was in there. It can easily be done. Just reach in while standing on the drivers side fender and reach in with you left hand.
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Old 10-09-2013, 01:37 PM   #87
flash02
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Removed and cleaned both the crank and cam position sensors, crank sensor was nasty, cam was fairly clean. Start-up is Much smother and quicker, hesitation is still there, going to look at fuel pressure as I've read that can also be a cause to the Subaru stutter/hesitation.
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Old 10-09-2013, 02:16 PM   #88
frederik
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Quote:
Originally Posted by flash02 View Post
Removed and cleaned both the crank and cam position sensors, crank sensor was nasty, cam was fairly clean. Start-up is Much smother and quicker, hesitation is still there, going to look at fuel pressure as I've read that can also be a cause to the Subaru stutter/hesitation.
Regarding hesitation, you can also check MAF (swap with a buddy with a 02-07 WRX or STI), spark plugs and fuel filter. In my case I had a faulty MAF but the problem only completely disappeared after changing plugs.
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Old 10-09-2013, 02:59 PM   #89
flash02
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Quote:
Originally Posted by frederik View Post
Regarding hesitation, you can also check MAF (swap with a buddy with a 02-07 WRX or STI), spark plugs and fuel filter. In my case I had a faulty MAF but the problem only completely disappeared after changing plugs.
Thanks for the tip, unfortunately I don't know anyone who I can swap MAF sensors with. The fuel filter was changed in August and the plugs at not that old. My car has had some upgrades which include bigger injectors, I'm really starting to think it may be a fuel problem, I'm going to check the fuel pressure before I spend any money on expensive sensors.
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