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Mid Atlantic Impreza Club Forum sponsored by Annapolis Subaru |
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08-01-2017, 01:57 PM | #1 |
Scooby Newbie
Member#: 331311
Join Date: Sep 2012
Location: Wellsboro pa
Vehicle:2008 wrx sedan psm |
08 wrx random start
I have a 2008 wrx manual and randomly it won't start. Sometimes it runs fine but randomly at any time of day and cold or warm engine it will crank but not start. No CEL
Things I've replaced Starter Battery Imobilizer and reflash Spark plugs Diagnostic test ran and found no faults
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08-02-2017, 10:33 PM | #2 |
Scooby Specialist
Member#: 292225
Join Date: Aug 2011
Chapter/Region:
MAIC
Location: Rockville, MD
Vehicle:08 WRX (16g) OBP |
Seems you have ruled out the mechanical aspect of cranking, along with the spark aspect, next would be fuel related.
Put your keys in the igniton, and cycle them to the position II. You will need to lift off the back seats, have someone put their ear to the passenger side seat metal. You should hear/feel vibrations of the fuel pump priming the system. Might be on it's way out if maybe it isn't priming the lines enough to get the car started. Another option would be to pull the feed line off the rail, and hook it up to a pressure tester and see how consistent your pressure is going into the rails. Stock fuel pump should be around ~40psi. |
08-03-2017, 09:44 PM | #3 | |
Scooby Newbie
Member#: 331311
Join Date: Sep 2012
Location: Wellsboro pa
Vehicle:2008 wrx sedan psm |
Quote:
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08-06-2017, 09:03 PM | #4 |
Scooby Newbie
Member#: 331311
Join Date: Sep 2012
Location: Wellsboro pa
Vehicle:2008 wrx sedan psm |
Bump started this morning now won't restart again
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08-06-2017, 09:10 PM | #5 |
Scooby Newbie
Member#: 470116
Join Date: Jun 2017
Chapter/Region:
RMIC
Location: Lakewood, CO
Vehicle:2018 WRX World Rally Blue |
Sorry if I'm missing something obvious here (not exactly a mechanic, personally lol). Did you check the alternator?
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08-06-2017, 09:17 PM | #6 |
Scooby Specialist
Member#: 292225
Join Date: Aug 2011
Chapter/Region:
MAIC
Location: Rockville, MD
Vehicle:08 WRX (16g) OBP |
Sounds like it's not fuel related if you have to bump start it.
You got some gremlins in there. |
08-10-2017, 09:12 PM | #7 |
Scooby Newbie
Member#: 331311
Join Date: Sep 2012
Location: Wellsboro pa
Vehicle:2008 wrx sedan psm |
Still no start as of today but still have power
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08-11-2017, 09:41 AM | #8 |
Scooby Newbie
Member#: 426326
Join Date: Jul 2015
Chapter/Region:
MAIC
Location: Rockville, MD
Vehicle:2008 Impreza WRX Dark Grey Metallic |
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08-11-2017, 09:45 AM | #9 |
Scooby Newbie
Member#: 426326
Join Date: Jul 2015
Chapter/Region:
MAIC
Location: Rockville, MD
Vehicle:2008 Impreza WRX Dark Grey Metallic |
You could monitor fuel pressure. I had some bad issues with my positive cables corroding on my 08 though when I first got it. If there isn't a strong enough current the rod may not be pushing out far enough to turn it over.
Last edited by dr4zz; 08-11-2017 at 10:21 AM. Reason: TLDR, car cranks |
08-12-2017, 08:01 AM | #10 | |
Scooby Specialist
Member#: 155017
Join Date: Jul 2007
Chapter/Region:
MAIC
Location: Maryland
Vehicle:2000 2.5RS Blue Ridge Pearl |
Quote:
I do not know if a single coil giving you issues would not allow the car to at least start. But I would check that route. Check the coil pack system. |
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08-12-2017, 12:35 PM | #11 |
Scooby Specialist
Member#: 292225
Join Date: Aug 2011
Chapter/Region:
MAIC
Location: Rockville, MD
Vehicle:08 WRX (16g) OBP |
MAF might have been damaged while cleaning?
Unplug the MAF from the intake, and trying turning it over. It should allow the car to be in a limp state - it should turn over almost immediately and start doing fueling calculations based on the MAP. |
08-12-2017, 06:23 PM | #12 |
Scooby Newbie
Member#: 331311
Join Date: Sep 2012
Location: Wellsboro pa
Vehicle:2008 wrx sedan psm |
Car started today drove it 15 miles not one problem at all
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08-13-2017, 09:22 AM | #13 |
Scooby Specialist
Member#: 201736
Join Date: Feb 2009
Chapter/Region:
MAIC
Location: On the Corner
Vehicle:12 IS-F Sold!! :( 07 STi...SOLD :'( |
Part out.
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09-10-2017, 02:14 PM | #14 |
Scooby Newbie
Member#: 331311
Join Date: Sep 2012
Location: Wellsboro pa
Vehicle:2008 wrx sedan psm |
Alright I've change fuel pump, new battery (I got a bad battery that wouldn't hold a charge), and new Alternator. Drove the car multiple days, most was 150 yesterday, stopping and restarting the car multiple times. This morning I go out and same problem again will crank but no start.
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09-12-2017, 01:46 PM | #15 |
Scooby Newbie
Member#: 331311
Join Date: Sep 2012
Location: Wellsboro pa
Vehicle:2008 wrx sedan psm |
Replaced crank sensor problem still occurs
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