Warm starting problem

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Andrewc_21
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Location: Seattle, WA

Warm starting problem

Post by Andrewc_21 » Sun Jun 18, 2017 2:41 am

So for a few weeks now I have been having this warm starting problem with my 93 N/A wagon, when I start it in the morning it starts right up, same if it is hot and I try starting it within a few minutes of turning it off. However, when it is hot, sits for 25-30+ minutes, it cranks for about 4-5 seconds before firing up. I have done hours of research and replaced:
the coil pack
plugs and plug wires
coolant temp sensor
PCV valve
Battery
fuel filter
fuel pressure regulator
cam position sensor
crank position sensor
... And I still have the exact same problem. I can hear the fuel pump prime when I turn it to ON and once it starts it runs smooth, never misfired or stalled on me, if anyone has any suggestions they would be much appreciated!

Andrewc_21
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Posts: 25
Joined: Sun Aug 23, 2015 1:26 am
Location: Seattle, WA

Re: Warm starting problem

Post by Andrewc_21 » Tue Jun 20, 2017 6:11 am

Add to that list the injectors and rails, and I cleaned the IACV with throttle body cleaner, still starting hard when it's warm I am 100% stumped

Legacy777
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Re: Warm starting problem

Post by Legacy777 » Mon Jun 26, 2017 5:32 pm

Have you put a fuel pressure gauge on the fuel line to see what it's doing while starting?

Do you have a spare MAF you can try? I don't know if I'd recommend buying a new one at this point, but could be worth swapping as a troubleshooting exercise.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm

Andrewc_21
In Neutral
Posts: 25
Joined: Sun Aug 23, 2015 1:26 am
Location: Seattle, WA

Re: Warm starting problem

Post by Andrewc_21 » Mon Jun 26, 2017 11:36 pm

Hey, I actually (knock on wood) just resolved the issue, replaced the fuel pump and strainer and so far has been starting as it should at all temps, thanks though!

Legacy777
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Re: Warm starting problem

Post by Legacy777 » Tue Jun 27, 2017 5:49 pm

Good to hear the problem is fixed.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm

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