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Old 10-16-2019, 10:54 PM   #1
anthony_suby713
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Member#: 505885
Join Date: Sep 2019
Default 2011 wrx head gasket service

Hey everyone,

I just recently had a head gasket service done that wrapped up today. I went to pick the car up and on my drive home it stalled twice.

The way it stalled was after I down shifted and put it into neutral as I was coming to a stop sign and a stop light it cut out on me twice.

A little about the car. The mods it has is the Cobb down pipe, Cobb intake, and an access port. The car was tuned prior to my purchase, however the car never stalled on me before the service.

Any ideas? What should I check before I bring it back to them to look it over.

Thanks!
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Old 10-17-2019, 01:36 AM   #2
CosmoTheCat
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Member#: 3409
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Oly
Vehicle:
98 My FMIC
Is bigger than yours.

Default

How many miles did they drive it? It's entirely possible that the learned values for idle have been erased from having the battery disconnected, and they didn't bother to run it long enough for it to relearn how to idle.

Typically if you clear memory and it stalls, it means the throttle body is dirty and the factory brand new clean throttle body default program doesn't work, so a throttle body cleaning and idle relearn is likely in order.

When I was working in a shop, I'd idle it long enough to bring it up to temp before taking it for a ~20 mile test drive. I'd rather lose money by being overly cautious than ship a car with an air pocket in the cooling system and have to lose more time because it overheated for the customer.
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Old 10-17-2019, 10:48 PM   #3
anthony_suby713
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Member#: 505885
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Quote:
Originally Posted by CosmoTheCat View Post
How many miles did they drive it? It's entirely possible that the learned values for idle have been erased from having the battery disconnected, and they didn't bother to run it long enough for it to relearn how to idle.

Typically if you clear memory and it stalls, it means the throttle body is dirty and the factory brand new clean throttle body default program doesn't work, so a throttle body cleaning and idle relearn is likely in order.

When I was working in a shop, I'd idle it long enough to bring it up to temp before taking it for a ~20 mile test drive. I'd rather lose money by being overly cautious than ship a car with an air pocket in the cooling system and have to lose more time because it overheated for the customer.


Thanks bud! Yea I let it idle for about 20 minutes to do the idle learn and that seemed to work
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Old 10-18-2019, 04:17 AM   #4
CosmoTheCat
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Member#: 3409
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Oly
Vehicle:
98 My FMIC
Is bigger than yours.

Default

Right on.

Side note - I hate lazy techs who don't verify their repairs. There's no excuse. Especially on something like this that should be well known due to bulletins/techtips being published about it.
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