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Old 08-01-2017, 02:58 PM   #1
messinger
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Default 08 wrx random no 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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Old 08-01-2017, 04:12 PM   #2
Fearsnear
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are you getting fuel?
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Old 08-01-2017, 04:26 PM   #3
Charlie-III
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If it cranks normally, why replace the starter?
If it cranks normally, why replace the battery?

Stock or modded?
If modded, what?
How many miles on your 2008 WRX?
Stock ECU map or tuned?

Any recent work done?
Recent gas fill up or about 1/2 way through a tank?
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Old 08-01-2017, 04:45 PM   #4
messinger
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Quote:
Originally Posted by Charlie-III View Post
If it cranks normally, why replace the starter?
If it cranks normally, why replace the battery?

Stock or modded?
If modded, what?
How many miles on your 2008 WRX?
Stock ECU map or tuned?

Any recent work done?
Recent gas fill up or about 1/2 way through a tank?
Changed starter because at first because it would only pop start and if I tapped in that starter start
Battery was tested so I replaced that because either way it needed to be done
Turbo back exhaust Cobb intake running Cobb ots map
No recent major work then what I've listed and done to try to solve this problem
This happens. I matter how much gas is in the tank
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Old 08-01-2017, 04:48 PM   #5
messinger
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143000 miles and yes I'm getting fuel
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Old 08-04-2017, 07:56 AM   #6
taxkourel
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Quote:
Originally Posted by messinger View Post
143000 miles and yes I'm getting fuel


Did you find what was wrong?
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Old 08-04-2017, 09:20 PM   #7
messinger
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Quote:
Originally Posted by taxkourel View Post
Did you find what was wrong?
Still have no idea at all so it's sitting till I get days off from working in the oil field to attempt to take it to a garage. Side note it didn't start at all for two days straight. This morning it fired up like nothing was ever wrong at all
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Old 08-05-2017, 05:17 PM   #8
taxkourel
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I am having similar symptoms but much less frequently. Happen on rainy days with half tank gas or less (might be coincidence though)...keep us posted and so will I.
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Old 08-06-2017, 10:03 PM   #9
messinger
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Bump ran fine this morning now it's back to nonstart
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Old 08-10-2017, 10:12 PM   #10
messinger
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Still won't start
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Old 08-11-2017, 08:24 AM   #11
jpg40
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Check fuel pressure. My FPR failed to relief at correct pressure, causing 90+ psi during startup. If pressure is too high, injectors will draw too much current, which will cause ECM to disable them. Check by teeing in a pressure gauge into the fuel supply line before the rail.

Note that when I had this issue, it only happened during hot starts. If I waited 20 min (enough time for the 90 psi to bleed off) it would start.
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Old 08-12-2017, 11:41 AM   #12
kingsalami
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I'd check the clutch engagement switch. If the switch doesn't complete the circuit, the car won't start.
This would explain the intermittent nature of the problem.
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Old 08-12-2017, 07:23 PM   #13
messinger
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Car started today drive it 15 miles not one problem at all
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Old 08-12-2017, 09:37 PM   #14
conseann3ry
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Are you getting spark when it won't start?
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Old 08-13-2017, 01:54 AM   #15
Charlie-III
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Quote:
Originally Posted by kingsalami View Post
I'd check the clutch engagement switch. If the switch doesn't complete the circuit, the car won't start.
This would explain the intermittent nature of the problem.
That switch prevents cranking.
Issue is crank but no start.
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Old 09-10-2017, 03:12 PM   #16
messinger
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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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Old 09-12-2017, 02:46 PM   #17
messinger
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Replaced crank sensor problem still occurs no start
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Old 09-14-2017, 11:01 AM   #18
Scoobyfan09
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Cam sensor maybe?
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Old 09-14-2017, 01:45 PM   #19
winston856
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Quote:
Originally Posted by jpg40 View Post
Check fuel pressure. My FPR failed to relief at correct pressure, causing 90+ psi during startup. If pressure is too high, injectors will draw too much current, which will cause ECM to disable them. Check by teeing in a pressure gauge into the fuel supply line before the rail.

Note that when I had this issue, it only happened during hot starts. If I waited 20 min (enough time for the 90 psi to bleed off) it would start.
Yes, I agree.

Quote:
Originally Posted by messinger View Post
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.
What are the results of your fuel pressure test? I suspect the Fuel Pressure Regulator is faulty and not bleeding off enough fuel, as the poster above has suggested. Too much fuel is just as bad as not enough.
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Old 09-14-2017, 02:17 PM   #20
Charlie-III
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Silver Sleeper BK, 5MT

Default

Quote:
Originally Posted by jpg40 View Post
Check fuel pressure. My FPR failed to relief at correct pressure, causing 90+ psi during startup. If pressure is too high, injectors will draw too much current, which will cause ECM to disable them. Check by teeing in a pressure gauge into the fuel supply line before the rail.

Note that when I had this issue, it only happened during hot starts. If I waited 20 min (enough time for the 90 psi to bleed off) it would start.
Quote:
Originally Posted by winston856 View Post
Yes, I agree.



What are the results of your fuel pressure test? I suspect the Fuel Pressure Regulator is faulty and not bleeding off enough fuel, as the poster above has suggested. Too much fuel is just as bad as not enough.
Interesting info from both of you, I will have to test this out. Thanks for the idea.
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Old 09-18-2017, 12:06 PM   #21
klimt
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Any update on your car, man? I'm having a similar no-start problem (cranks but won't catch). Took to a shop that tested my fuel line pressure, saw over 100 psi, so I replaced the Fuel Pressure Regulator with a new OEM part. Still won't start...
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Old 09-29-2017, 11:25 PM   #22
messinger
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Quote:
Originally Posted by klimt View Post
Any update on your car, man? I'm having a similar no-start problem (cranks but won't catch). Took to a shop that tested my fuel line pressure, saw over 100 psi, so I replaced the Fuel Pressure Regulator with a new OEM part. Still won't start...
Still no new info. Wonít start still so Iím waiting for my days off to take it to a shop
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Old 09-30-2017, 02:28 AM   #23
Charlie-III
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Silver Sleeper BK, 5MT

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Quote:
Originally Posted by klimt View Post
Any update on your car, man? I'm having a similar no-start problem (cranks but won't catch). Took to a shop that tested my fuel line pressure, saw over 100 psi, so I replaced the Fuel Pressure Regulator with a new OEM part. Still won't start...
Quote:
Originally Posted by messinger View Post
Still no new info. Wonít start still so Iím waiting for my days off to take it to a shop
Klimt fixed his......https://forums.nasioc.com/forums/sho....php?t=2853031
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Old 09-30-2017, 11:35 AM   #24
taxkourel
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Quote:
Originally Posted by Charlie-III View Post


He said he changed the fuel pump.
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