Kalando82 Posted March 17, 2018 Posted March 17, 2018 Just like what the title said... My 96 legacy and I were stuck in traffic today and as I'm sitting there it started idling weird. And it almost felt like a misfire. But when i start taking off it smoothed out and ran like normal, it wasnt over heating either, nor was there a loss of power, and no smoke. After 15 mins of traffic I got to my dads cause it was the closest place I could check out my car, I turned the key off and it chugged for about 5 seconds and turned off. Ive never seen this before (this is my first and only subaru out of 8 cars and a 2 ton flatbed.) after that I let the subaru sit for about 25min and it took longer than normal to start but when it did it ran fine. I turned it off and it didnt chug, I turned it on again and it fired right up like normal. After letting it cool down I pulled the plugs and the gaps on all of them were at 51. So I regapped them and put them back in and drove it home with no problems. Has anyone exerienced this with any subaru? Any help or ideas will be greatly appreciated.
doublechaz Posted March 17, 2018 Posted March 17, 2018 I haven't seen a car chug after turnoff like that since the 1970s. Used to call it deiseling. It shouldn't be possible with fuel injection. I'd say fuel is leaking around or through an injector to allow it. That could leave the one cylinder under the leak very rich at idle so it would be rough. If the leak was a bit of junk in the fuel it could be a one time thing that then passed through the injector. Keep an eye on it.
Kalando82 Posted March 17, 2018 Author Posted March 17, 2018 Thats exactly what I was thinking but instead of the injectors leaking into the cylineeds I was thinking spark plugs not being gapped right and not burning all the fuel? I own a 1970 olds 455 and never seen that happen, tho ive heard stories of dieseling. I'll keep an eye on it since its my daily. If it happens again I might be in the market for some injectors.
eagleeye Posted March 17, 2018 Posted March 17, 2018 first congrats on getting a EJ221. how good is the battery, what happens when you jump it with a known good battery, how good are the battery cables. (slice them and look for corrosion, with a new roll of great electrical tape in hand). look to clean all the engine grounds. (bad ones adjust with temps) relays in the fuse box under the hood.. (also adjust with temps). if you think it needs a alternator, these were recalled a long time ago, and subaru made lots and lots of remans for them. (same one was on turd EJ25D) so for $75 you can get the OEM from a dealer, (might have to wait a day for them to round one up out of the area warehouse). and not overpay for a half fixed piece of junk from a parts store,...making its 3rd round trip out of chevy cavilers.
Kalando82 Posted March 17, 2018 Author Posted March 17, 2018 Thanks, its a really cool car for 200 dollars. Just got home and it hasn't had that problem yet after driving it all day. Must have been a one time thing... Knock on wood. Thanks for the replies, I was actually planning on going through the grounds on the subaru and checking them.
AKDivo Posted March 22, 2018 Posted March 22, 2018 Funny you should bring this up. I have a 96/97 suby 2.2 in my VW Bus and it has been dieseling for years. There's no rhyme or reason for it. I have no idea why it would be happening. I have put 60,000 miles on it and drove north and south america with it. If it does come down to an electric issue that would be interesting. I only have the engine grounded through the battery right now and always wondered if there should be more grounds somewhere. Cheers. Let me know what you find out!
Setnev Posted March 22, 2018 Posted March 22, 2018 Dieseling in a modern fuel injection motor is very rare, but not impossible. Two things that can cause it leaking fuel injectors and carbon buildup. Carbon buildup causes hotspots in the cylinder causing spontaneous combustion in the cylinders.
Kalando82 Posted March 25, 2018 Author Posted March 25, 2018 I checked my grounds and they were not that bad but I cleaned them anyways. While in the process I found a cracked vacuum line that ran from the passenger side of the intake to the fuel rail and to some sensor on the passenger side shock tower as well. I replaced all those lines and I have noticed a difference in idle and throttle response. I haven't had the dieseling issue since the beginning of this topic. As said before maybe its a one time thing or possibly an injector or carbon build up. Either way if it happens again I'm gonna pull injectors and test them unless there's another way to test them?
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