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Old 06-24-2010, 02:10 PM   #1
pmatty
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Default 2002 wrx wont always start?

hey guys .. my 02 wrx will sometimes start right up and other times wont... it keeps cranking it takes about 15 times and then it will start right up. The only code i got was crankshaft position sensor which i replaced yesterday. the problems still is there i also replaced the battery. It just dosnt make any sense somedays it starts right up and others it wont any one have these issues or could give me advice? thanks - matt
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Old 06-24-2010, 02:23 PM   #2
BKscooby
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If you are throwing the crank position sensor code, and you replaced the sensor, most likely it is bad ground. The most important question is did you change a belt? As if you didn't it may skip a tooth (if the belt is old enough), and throw a code. And if you did, are you certain that timing is correct, and some mechanic didn't do a half ass?

A few other possibilities that may interfere with your car taking a while to start, but they have nothing to do with the crank position sensor:
Fuel filter
Plugs
Fuel pump
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Old 06-24-2010, 03:55 PM   #3
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negative i changed the belts a long time ago you think i should try to do that first car has 72,000miles btw
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Old 06-24-2010, 04:28 PM   #4
BKscooby
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How many miles ago was the timing done?
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Old 06-24-2010, 06:57 PM   #5
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NotSure if it was ever done I thought it gets changed at 100k... Some people are saying maybe bad coil pack
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Old 06-24-2010, 07:55 PM   #6
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you can never rule out the fuel pump with intermittent starts.
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Old 06-24-2010, 08:07 PM   #7
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crankshaft position sensor code with a bad fuel pump? I don't think so.
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Old 06-24-2010, 09:12 PM   #8
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Yea I deff don't think it's a bad file pump I can hear it prime up and all
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Old 06-24-2010, 10:27 PM   #9
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Check the negitive battery cable end near the starter. Make sure it's on there and tight.
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Old 06-24-2010, 11:35 PM   #10
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check every ground on the block and car. I bet you have one disconnected..
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Old 06-25-2010, 12:31 AM   #11
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do you have any diagram on the grounds anyone?
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Old 06-25-2010, 09:19 AM   #12
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Coil pack might have been an issue if you'd be throwing cylinder misfire, but you said that it is crankshaft position sensor code, and in this situation you must first check the grounds, I bet that is the issue, I've come across it a few times on other Subarus.
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Old 06-25-2010, 10:10 AM   #13
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Okay the wierd thing is if I roll the car on pop the clutch even just an inch then crank the car again it starts ? I don't get it lol maybe a sparkplug or would that be a ground it starts up every time after I pop the clutch
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Old 06-25-2010, 10:12 AM   #14
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And that is usally when I get the code ... Only when I have to pop the clutch a little then stop and crank
it starts right up
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Old 06-25-2010, 10:39 AM   #15
hybrid gti 2
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Have you had your battery tested?
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Old 06-25-2010, 11:19 AM   #16
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Yea I bought a new one thinking that was the issue Volts are fine I have a turbo timer that shows no issues with volts dropping... I'm
gonna buy a groundingkit and see
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Old 06-28-2010, 10:07 AM   #17
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I'm having this same issue. Cleaned the CPS, checked all its connections, checked every ground, everything is solid. The battery is also in great shape (Optima Red Top).

When the car is cold, it will start right up first time. When it's warm, it will only start right up about 1/4 of the time. When it doesn't start right up, it just clicks, no attempt to crank. I have to try this sometimes 2, sometimes 100 times before it actually starts. Sometimes it throws the P0335 CPS code, sometimes it doesnt. And every once in a while when it does start, it cranks over longer than normal.

It's pissing me off
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Old 06-28-2010, 01:33 PM   #18
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Warm bad starup? Clean your maf, then clean your iacv
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Old 06-28-2010, 04:32 PM   #19
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Quote:
Originally Posted by Audiosavvy View Post
I'm having this same issue. Cleaned the CPS, checked all its connections, checked every ground, everything is solid. The battery is also in great shape (Optima Red Top).

When the car is cold, it will start right up first time. When it's warm, it will only start right up about 1/4 of the time. When it doesn't start right up, it just clicks, no attempt to crank. I have to try this sometimes 2, sometimes 100 times before it actually starts. Sometimes it throws the P0335 CPS code, sometimes it doesnt. And every once in a while when it does start, it cranks over longer than normal.
bad solenoid would be my bet... I've seen tons of solenoids on other (non automotive) engines that won't work when hot. Cool them off and it works fine. NORMALLY you can just take out a pair of jumper cables and jump the starter, IIRC subaru starters integrate the solenoid right on the starter, no bypassing it.
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Old 06-29-2010, 01:16 AM   #20
pmatty
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Wow yea WTF I'm gettin the same exact issues and I really just wanna blow the car up when it dosnt want to start let me know if you
fix the issue... I think it has to be a
sensor or something since it
got worste over time but who knows
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Old 03-20-2012, 12:47 PM   #21
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Sorry for bringing this back from the dead, but did any of you guys resolve ur issues? I'm experiencing the same thing. Replaced my crank and camshaft sensor, battery, positive and negative leads, starter, and checked my grounds. Also checked the switch on the clutch pedal. Usually starts up in the morning fine, but if I try to start it up later on in the day or if the car is warm, all I get is a click. After several attempts then it'll fire up.
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Old 05-08-2012, 12:33 PM   #22
flexkye
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I'm having the exact same issues with my 2002 impreza, did anyone find solve the mystery ? please let me know..
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Old 05-08-2012, 08:39 PM   #23
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You need to check ALL your grounds, once your done checking them, check them again.

Pull each ground off and clean it up as best as you can then re attach it and make sure it is tight!

I had the same issue for 8 months, except it was so intermittent that it was hard to diagnose. Turned out to be a bad ground.
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Old 05-31-2012, 09:57 AM   #24
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Having the same issue. replaced Crank position sensor which broke off of course and turned into an ordeal. Seemed to work better for a few days and back to doing the one click again. Checking all grounds later today.
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Old 05-31-2012, 10:09 AM   #25
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It could be the connections by your Fuel Pump, and your FP could be fine. I had this issue with my 2009. I had to pull it twice to fix the issue. The first time is was the o-rings around my walbro. The 2nd time is was hose next to the fuel pump, also related to o-rings and a clip. It would be worth pulling and checking.
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