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Old 11-29-2019, 12:03 PM   #1
jeff6666p
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1998 2.5rs06wrx swap
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Default ringlands

I accidentally ran my return fuel line to my evap. I took the out for a drove before I realized it and when I got into boost wot there was a bang and it felt like the car had died in it's tracks. The tank showed half full at the time it may of been much less because I found out is was leaking gas out the evap can after the drive. It drove fine after but if i got it of to 5k it started feeling like it was going to do it again. I fixed the lines , put some gas in it and took it for a drive and it seems fine now pulls great. no cel light.

Was the bang likely from fuel starvation? If it blew the ringlands would it sound different? I'm super nervous that I blew it my first day having the car

vacuum reads 18 in hg
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Old 11-29-2019, 12:43 PM   #2
alexholl
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I don't think it was fuel starvation. It's more likely that the evap line/system was putting too much downstream pressure on the fuel regulator. You had too much fuel pressure to the injectors since there was nowhere for the excess fuel to go. That caused it to run rich and it fell flat on its face. The bang you heard might've been the evap canister blowing out or one of the evap valves on the motor opening up with a high differential fluid pressure which couldve also dumped in some extra fuel.
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Old 11-29-2019, 12:52 PM   #3
BlackFighter
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What car is it, the 98 2.5RS? You don't really "hear" a ringland brake. Fuel starvation also should not give off a "bang". The bang could have been a hose popping off or a canister. It would feel like the car is just not going anywhere while pushing the gas and fast deceleration, almost like someone put the brakes on.

If you are really worried then take it in to a suby shop "not dealer, unless you have warranty" and have them preform a leak down test and cyl compression test

Last edited by BlackFighter; 11-29-2019 at 01:00 PM.
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Old 11-29-2019, 01:03 PM   #4
jeff6666p
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Quote:
Originally Posted by BlackFighter View Post
What car is it, the 98 2.5RS? You don't really "hear" a ringland brake. Fuel starvation also should not give off a "bang". The bang could have been a hose popping off or a canister. It would feel like the car is just not going anywhere while pushing the gas and fast deceleration, almost like someone put the brakes on.

If you are really worried then take it in to a suby shop "not dealer, unless you have warranty" and have them preform a leak down test and cyl compression test
06 wrx engine. "It would feel like the car is just not going anywhere while pushing the gas and fast deceleration, almost like someone put the brakes on." That's what happened when I heard the bang. It was like someone slammed on the brakes. After that the car rans fine but when I eased it up to 5k it started stuttering so I backed off.
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Old 11-29-2019, 01:11 PM   #5
jeff6666p
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Quote:
Originally Posted by alexholl View Post
I don't think it was fuel starvation. It's more likely that the evap line/system was putting too much downstream pressure on the fuel regulator. You had too much fuel pressure to the injectors since there was nowhere for the excess fuel to go. That caused it to run rich and it fell flat on its face. The bang you heard might've been the evap canister blowing out or one of the evap valves on the motor opening up with a high differential fluid pressure which couldve also dumped in some extra fuel.
It sounded like it came from the front of the car. It was like someone slammed on the brakes at full force. Is there any where I should check? The cel light isn't on, do you think the engine should be fine?
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Old 11-29-2019, 01:35 PM   #6
alexholl
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Originally Posted by jeff6666p View Post
It sounded like it came from the front of the car. It was like someone slammed on the brakes at full force. Is there any where I should check? The cel light isn't on, do you think the engine should be fine?
compression/leak down is your best place to start. Your evap system is definitely toast, so delete it and tune or if you're in a state that does inspections, find a part out or junkyard one.
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Old 11-29-2019, 06:56 PM   #7
jeff6666p
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1998 2.5rs06wrx swap
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Quote:
Originally Posted by alexholl View Post
compression/leak down is your best place to start. Your evap system is definitely toast, so delete it and tune or if you're in a state that does inspections, find a part out or junkyard one.
If the evap system was bad shouldn't codes come up? I don't have a cel's
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Old 11-29-2019, 10:14 PM   #8
alexholl
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Quote:
Originally Posted by jeff6666p View Post
If the evap system was bad shouldn't codes come up? I don't have a cel's
not always. If its a tank line or a busted canister it may not always show a CEL
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Old 12-02-2019, 10:24 AM   #9
BlackFighter
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It also sounds like a coupler popped off. Check all coupler, IC to TB always popes off.
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