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00 Forester 5 Speed
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80 Posts
Discussion Starter · #1 · (Edited)
Hey guys,

2000 forester, 5 speed 147k miles. This rarely happens, but twice since I've owned it, right when I start the car it dies. It doesn't stall, it just dies. It starts up immediately after when I try again.

After doing some reading, could it be a dirty iac valve? I wouldn't think so because the idle is really smooth. Any suggestions would be great. Maybe I should just clean it anyway? This problem happens so infrequently that it would be hard to tell if I actually fixed the problem.
 

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2007 FXT Limited 5MT
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2,815 Posts
If you rev it as soon as it starts does it still die? keep the pedal somewhat pushed down as you start it and see if you can keep it running with some throttle
 

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00 Forester 5 Speed
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80 Posts
Discussion Starter · #3 ·
It would be really hard to test that. This problem happens so infrequently that I would need to gas it on every start up, then if it worked I wouldn't know right?

It's really weird, as soon as it turns over it shuts off. Like someone pulled the battery cable off.
 

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2000 Forester 6MT STI
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593 Posts
definitely curious about this one too, I've had the same issue, and yes if you tap the gas or open the throttle right when you see the RPMs dive back to 0 she'll keep alive, barely and then rise back up to normal idle.
If I'm not mistaken, it goes like this, engine fires over, everythings fine for not even a second and than bam, nothing, no shakes or anything, as if the engine was turned off right?
 

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00 Forester 5 Speed
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80 Posts
Discussion Starter · #5 ·
Sounds exactly like my problem. Does yours also happen very infrequently?
 

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00 Forester 5 Speed
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80 Posts
Discussion Starter · #6 ·
Do you have keyless entry? Could this be a anti theft problem? Maybe it's not reading my key properly and shutting off the car?
 

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2015 Impreza 5-Door Sport Auto (CVT)
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2,351 Posts
I had a similar problem with my 2003 Ford Escape.

After I changed the IAC it never happened again.
 

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2000 Forester 6MT STI
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593 Posts
Sounds exactly like my problem. Does yours also happen very infrequently?
yeah very infrequently, also I have keyless entry but my key doesn't have a chip in it so I know it's not an alarm issue. I'm gonna clean my IAC and see if tht helps at all.
 

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2010 Legacy GT LTD 6 spd
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967 Posts
Mine does this when i put regular gas in, I use premium usually to avoid this and the general lazy feeling of the engine.
 

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1999 Forester S 5-Speed Manual
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217 Posts
Have you overlooked obvious things, like a dirty air filter or dirty throttle body?

Other than that, maybe try changing fuel brands (not octane, there's really no need for higher octane than the vehicle manufacturer recommends). I had a car years ago that did that because the fuel station I stopped at had excessive water in their storage tanks.
 

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00 Forester 5 Speed
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80 Posts
Discussion Starter · #11 ·
I'll be cleaning tb and iac. How often do I need to clean my K&N cone filter?
 

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2010 Legacy GT LTD 6 spd
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967 Posts
Have you overlooked obvious things, like a dirty air filter or dirty throttle body?

Other than that, maybe try changing fuel brands (not octane, there's really no need for higher octane than the vehicle manufacturer recommends). I had a car years ago that did that because the fuel station I stopped at had excessive water in their storage tanks.
I hear this time and again that octane rating doesn't matter, but for whatever reason it has mattered to my forester, my wife's legacy, and our Tribeca. None of them have liked switching from our normal 93 chevron to 87. It has caused hesitation, poor fuel economy, and general sluggish running. The Tribeca I know is supposed to have 91 or better, my wife put regular because she thought she was saving money...she literally went 175 miles on that tank then refilled with premium and voila back to normal 230-250 miles per tank. I trust what I have experienced, my circumstances may be unique to me but they are what they are. I have no reason to lie about them to complete strangers on the internet.
 
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