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Just before christmas, I've replaced the fluel tank on my impreza 2002 TS hatchback.

 

The fuel tank was almost empty, after the replacement, I did 10-15 miles driving without problems. The trouble started after fueling the car full. after 1 miles of driving, the rpm was going up and down, the car was stuttering and shaking. I was able to drive home and tested the car a low speed with this problem happening more ofter.

 

The next morning I started the car and leave it heat for 10 minutes and when I stepped on the pedal, the car died... So I called the mechanics to have my car towed so they can check the trouble. after verifying everything ( emptying half the tank doing so). They told me it was my Gas cap that was broken and gave a generic one.

 

With the new gas cap and half a tank, everything was fine, car running great. I did almost 250 miles, but being not sure of the gas cap problem, I never fulled the car full, always in the half 3/4 range.

 

Last week I fueled the car full, guest what, starvation again...

 

For now i'm driving without cap and everything's fine, I have the check engine led, but car running great.

 

A original gas cap cost 35$ buck, the dealer needed my serial because they where 2 kind of cap that year and told me I SHOULD by an original...

 

My question: Can a broken gas cap do this kind of trouble ???

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Yes the tank is not getting fresh air as it uses up fuel, so you get a vacume lock. If it is really bad you can crush the fuel tank.

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who installed the tank??

 

any chance the hoses got mixed up, kinked, twisted??

 

I hope they checked that, because I had to return twice, the first time they told me they did a shampoo and it was condensation, the second time, they told me it was the gas cap. Do I really have to buy a Subaru Cap or I can go OEM ?

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I hope they checked that, because I had to return twice, the first time they told me they did a shampoo and it was condensation, the second time, they told me it was the gas cap. Do I really have to buy a Subaru Cap or I can go OEM ?

 

i doubt it is the cap, but if you want to try oem, buy a used one.

 

i'd make the shop that installed the tank fix it. something is not right.

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fill the tank near the shop, leave the cap loose, drive carefully to the shop, fastne cap normally and take mechanic for a ride.

 

make sure this will duplicate the problem.

 

they installed something wrong, broke something,or got a bad part.

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Probably pinched the breather line.

Tank should not have to breathe through the gas cap.

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I'm very unlucky with this car, each time I go to a shop for a fix, I have to return because something is wrong. Is Subaru so hard to work on ;)

 

I'm in the process of buying a new sub, I will leave the old one at the shop so they can check and recheck...

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Did not have the chance to bring it where they installed the tank and frankly i'm not sure I want them to work on it anymore. If it's the breather line, is it a costly job to have it checked ?

 

I'm still running with no gaz cap, everything seems to be fine.

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A little update,

 

Had to go to a subaru dealer for a recall.

Since I was there I asked them to check my tank installation, they analysed the check engine code and told me it was surely a cable piched under the new tank. a 4-5 hour job to check at 110$. So I asked them if I can continue driving without my gaz cap and they told me that it's not a problem. I'm driving like this since then and car's running fine.

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