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Old 06-19-2018, 09:23 PM   #1
namelesswrex
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Default Intermittent Starting Issues

04 WRX Unmodified

Went to leave work today and the car would crank, but not turn over and start. Tried multiple times before stopping for fear of damaging it. Checked fluids and fuses and everything seemed in order. No CEL and all electrics were working. Had my roommate come pick me up. When he arrived I tried to show him the problem I was having and sure as hell it fired right up on my first go. Had him drive it around by himself a bit as an impartial 3rd party to see if he noticed anything out of the ordinary and he said he didn't find anything strange. Then I drove it 30 minutes back home and again nothing seemed to be wrong. Have looked at other threads, but didn't seem to find any applicable information. If you have any insight or if I have posted in the wrong forum please respond at your earliest convenience. Much thanks for any help.
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Last edited by namelesswrex; 06-20-2018 at 02:23 PM. Reason: Grammatical error
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Old 06-20-2018, 12:31 PM   #2
Samurai Jack
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Who is "he" you keep referring to?

Bad starter, weak battery, bad cable connections, bad cables

Any combination of the above
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Old 06-20-2018, 02:21 PM   #3
namelesswrex
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Quote:
Originally Posted by Samurai Jack View Post
Who is "he" you keep referring to?

Bad starter, weak battery, bad cable connections, bad cables

Any combination of the above

I apologize I thought I had noted my roommate came to pick me up. I will check to confirm all you have listed as well though, thank you.
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Old 06-20-2018, 09:46 PM   #4
Charlie-III
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1998 Legacy 2.5GT
Silver Sleeper BK, 5MT

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OK, crank is fine (sounds like).
Please don't say, "it cranks but won't turn over and start".
It cranks, it turns over.
It won't start.

Does it crank about normal speed?
Did you do any recent work to the engine? If so, what?
How many miles on the engine?
When was last tune up?
Did you recently either get gas or get gas from a "non normal" place?
Was it really wet out when it wouldn't start?

Could be due for plugs or wires. Wet out could be shorting spark through the wires.
Different gas could be a slug of water. Engines don't run on water. Maybe you cleared out a bit and now it's OK.

May sound like I'm a PITA or picking on you, just trying to gain info.

(Sorta like a peep that states it won't crank or start. If it won't crank, of course it won't start.......).
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Old 06-21-2018, 07:26 AM   #5
Samurai Jack
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Quote:
Originally Posted by Charlie-III View Post
OK, crank is fine (sounds like).
Please don't say, "it cranks but won't turn over and start".
It cranks, it turns over.
It won't start.

(Sorta like a peep that states it won't crank or start. If it won't crank, of course it won't start.......).
I think there is actually a distinction between the two, so I understand why namelesswrex said what he said.

"It won't start" to me means one of two things:
1. when you turn the key, nothing happens
2. it cranks but won't start

namelesswrex is being a little more descriptive
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Old 06-21-2018, 02:47 PM   #6
namelesswrex
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Quote:
Originally Posted by Charlie-III View Post
OK, crank is fine (sounds like).
Please don't say, "it cranks but won't turn over and start".
It cranks, it turns over.
It won't start.

Does it crank about normal speed?
Did you do any recent work to the engine? If so, what?
How many miles on the engine?
When was last tune up?
Did you recently either get gas or get gas from a "non normal" place?
Was it really wet out when it wouldn't start?

Could be due for plugs or wires. Wet out could be shorting spark through the wires.
Different gas could be a slug of water. Engines don't run on water. Maybe you cleared out a bit and now it's OK.

May sound like I'm a PITA or picking on you, just trying to gain info.

(Sorta like a peep that states it won't crank or start. If it won't crank, of course it won't start.......).
No hard feelings at all I understand where you are coming from. I was trying to give as much info as possible, but can understand how my phrasing was confusing. To address the questions you had in order

1) Yes it is cranking at normal speed
2) No recent work done to the engine
3) 180k on the engine (She's getting up there for sure)
4) Last tune up was about 10 months ago
5) Hadn't got gas in the three days leading up to it and it was fine
6) Yes it was raining off and on and very humid that day

Thank you very much for your reply and input. I appreciate you taking the time to help me out
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Old 06-21-2018, 02:54 PM   #7
Charlie-III
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Silver Sleeper BK, 5MT

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OK, thanks for more info.
Is your car COP (coil on plug) or a single coil pack with wires to the plugs? If single, did you do wires as well?
Since it was wet/humid, old wires can short out, thus my question.
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Old 06-21-2018, 06:06 PM   #8
namelesswrex
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It is COP and I haven't changed the wires, nor do I see anything in the maintenance history about them being replaced
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Old 06-21-2018, 10:17 PM   #9
Charlie-III
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1998 Legacy 2.5GT
Silver Sleeper BK, 5MT

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Well, COP really doesn't have wires. It's a coil pack that just fits onto the plug so we can rule wires out.
Condensation in the plug wells could cause a misfire, who knows.
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Old 06-22-2018, 03:55 AM   #10
CosmoTheCat
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Quote:
Originally Posted by Samurai Jack View Post
Who is "he" you keep referring to?

Bad starter, weak battery, bad cable connections, bad cables

Any combination of the above

Cam/Crank sensor going out would also cause this, and likely not set any codes.
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Old 07-12-2018, 12:20 AM   #11
sabyjoe
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Hello all, wanted to come back on this thread with a start-up issue that Iím facing on my 2009 WRX.
The video at the bottom summarizes the issue (I think I may have been cranking it a bit too long on this occasion). So far the car has been starting up after a few cranks. Up to 4 except the last time this evening when I had to go up to about 6 (problem seems to get worse). Iíve had the issue since about 3 days now and am planning to take it to the shop on Friday when I finally have some free time from work. Any input in the interim would be of great help.
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Old 07-12-2018, 12:34 AM   #12
jbro16
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Location: Utah
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2005 Impreza WRX STI
WRB

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Quote:
Originally Posted by namelesswrex View Post
04 WRX Unmodified

Went to leave work today and the car would crank, but not turn over and start. Tried multiple times before stopping for fear of damaging it. Checked fluids and fuses and everything seemed in order. No CEL and all electrics were working. Had my roommate come pick me up. When he arrived I tried to show him the problem I was having and sure as hell it fired right up on my first go. Had him drive it around by himself a bit as an impartial 3rd party to see if he noticed anything out of the ordinary and he said he didn't find anything strange. Then I drove it 30 minutes back home and again nothing seemed to be wrong. Have looked at other threads, but didn't seem to find any applicable information. If you have any insight or if I have posted in the wrong forum please respond at your earliest convenience. Much thanks for any help.
Did you ever get this fixed? I had a similar issue with my 07wrx I had. When it was hot or humid outside the car would crank/not start for days. I threw a bunch of parts at it, wasted a lot of money. Got a couple mechanic friends over to test everything. Turned out to be the fuel pressure regulator. I simply wasn't getting any fuel. Costs about 30 bucks. Not terrible to swap out. Just a thought.
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Old 07-12-2018, 02:17 AM   #13
CosmoTheCat
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Is bigger than yours.

Default

sabyjoe, I'd get a fuel pressure gauge on it.

Try turning the key to on, wait a few seconds, off, then on for a few seconds, off again. Let the fuel pump prime several times and then try cranking it.
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