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#4384813 - 04/21/17 06:18 AM Subaru recalls 33K new Imprezas / winter gas issue
wemay Offline


Registered: 04/04/12
Posts: 7078
Loc: Miami, FL
https://www.cnet.com/google-amp/news/subaru-recalls-33k-new-imprezas-for-stalling-engines/

"The culprit in this case is the engine, brought on by using "winter blend" fuel. Under low-speed or high-temperature conditions, fuel may vaporize inside the fuel line. This could cause a drop in fuel pressure, which can make an engine operate roughly or stall out completely. In certain cases, it may take a little while for the engine to start again."
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#4384826 - 04/21/17 06:42 AM Re: Subaru recalls 33K new Imprezas / winter gas issue [Re: wemay]
demarpaint Offline


Registered: 07/03/05
Posts: 27765
Loc: NY
Some of us thought vapor lock was a thing of the past. They want these engines to run hot, some too hot IMO. My Wrangler radiator fan is programmed to come on at about 226F, too hot for this old timers liking. In the summer I run the AC all the time which turns the fan on a low setting by default, and keeps the temps below 226F.
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#4384864 - 04/21/17 07:59 AM Re: Subaru recalls 33K new Imprezas / winter gas issue [Re: wemay]
FutureDoc Offline


Registered: 10/30/13
Posts: 1554
Loc: North Carolina
So it was a CPU programming item. Meh.

I think this is going to become common place with a lot of programming recalls. Manufacturers will fish like heck so not swap parts but re-flashing the ECU makes it a lot less risky.
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'15 Hyundai Genesis Coupe 3.8 - Havoline 5w-30 & OEM Filter
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#4384875 - 04/21/17 08:07 AM Re: Subaru recalls 33K new Imprezas / winter gas issue [Re: wemay]
Miller88 Offline


Registered: 04/09/08
Posts: 12095
Loc: Onondaga County
I have this issue on my Cherokee. Ethanol free gas isn't terrible, but winter blend regular gas is awful. If I shut it off and plan to restart it in 20 minutes, I have to leave the hood propped up. Always have to leave the hood open at the store.

And when we get those 70 degree days in February, I'll lose a cylinder or two sitting at a stoplight.

This is a fuel injected engine, too!
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#4384946 - 04/21/17 09:35 AM Re: Subaru recalls 33K new Imprezas / winter gas issue [Re: Miller88]
PimTac Offline


Registered: 03/04/17
Posts: 775
Loc: Soviet State of Washington
Originally Posted By: Miller88
I have this issue on my Cherokee. Ethanol free gas isn't terrible, but winter blend regular gas is awful. If I shut it off and plan to restart it in 20 minutes, I have to leave the hood propped up. Always have to leave the hood open at the store.

And when we get those 70 degree days in February, I'll lose a cylinder or two sitting at a stoplight.

This is a fuel injected engine, too!




You must live in a very low crime area. Up here in the Seattle metro, if you left your hood up, that engine would be gone by the time you returned if not the whole vehicle. Gone in 60 seconds.

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#4385073 - 04/21/17 11:46 AM Re: Subaru recalls 33K new Imprezas / winter gas issue [Re: PimTac]
Miller88 Offline


Registered: 04/09/08
Posts: 12095
Loc: Onondaga County
Originally Posted By: PimTac
Originally Posted By: Miller88
I have this issue on my Cherokee. Ethanol free gas isn't terrible, but winter blend regular gas is awful. If I shut it off and plan to restart it in 20 minutes, I have to leave the hood propped up. Always have to leave the hood open at the store.

And when we get those 70 degree days in February, I'll lose a cylinder or two sitting at a stoplight.

This is a fuel injected engine, too!



You must live in a very low crime area. Up here in the Seattle metro, if you left your hood up, that engine would be gone by the time you returned if not the whole vehicle. Gone in 60 seconds.



For the most part, I do. But it's pretty beat up and quite dirty. I think that helps.

I have the factory electric fan wired to a switch that is powered by ignition on. Last time it had one of these fits I left it in the walmart parking lot with the hood up, key and fan on and went in and did my shopping.

I did take a relay or two with me. But it started right up and ran on all 6 cylinders.
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#4387801 - 04/24/17 03:15 PM Re: Subaru recalls 33K new Imprezas / winter gas issue [Re: Miller88]
Bladecutter Offline


Registered: 02/21/11
Posts: 1375
Loc: Dacono, CO
Originally Posted By: Miller88
I have this issue on my Cherokee. Ethanol free gas isn't terrible, but winter blend regular gas is awful. If I shut it off and plan to restart it in 20 minutes, I have to leave the hood propped up. Always have to leave the hood open at the store.

And when we get those 70 degree days in February, I'll lose a cylinder or two sitting at a stoplight.

This is a fuel injected engine, too!


Wow.

There is no way on earth that the conditions you just described are normal, otherwise we would be seeing parking lots full of Jeep products parked everywhere with their hoods up, all over the country, and not just yours.

You should consider fixing your car.

BC.
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#4388119 - 04/24/17 10:08 PM Re: Subaru recalls 33K new Imprezas / winter gas issue [Re: Bladecutter]
jeepman3071 Offline


Registered: 04/15/10
Posts: 3072
Loc: Storrs, Connecticut
Originally Posted By: Bladecutter
Originally Posted By: Miller88
I have this issue on my Cherokee. Ethanol free gas isn't terrible, but winter blend regular gas is awful. If I shut it off and plan to restart it in 20 minutes, I have to leave the hood propped up. Always have to leave the hood open at the store.

And when we get those 70 degree days in February, I'll lose a cylinder or two sitting at a stoplight.

This is a fuel injected engine, too!


Wow.

There is no way on earth that the conditions you just described are normal, otherwise we would be seeing parking lots full of Jeep products parked everywhere with their hoods up, all over the country, and not just yours.

You should consider fixing your car.

BC.




This is a common problem with 2000-2001 Cherokees due to the cat converters on the exhaust manifold filling the engine bay with heat. There is a TSB for this issue. The fix is a PCM flash that turns the electric fan on every time you do a hot start. The fan will run for a minute or two then shut down. The dealer also installs a heat shield on the fuel injectors. I had this TSB done to my Jeep 6 years ago and it hasn't run rough since. Worn cooling system components also contribute to the problem.
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2000 Jeep Cherokee Sport 4.0L (173k) - Pennzoil HM 10w30, Wix 51516, Magnefine trans filter

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