robbie95 Posted April 26, 2013 Posted April 26, 2013 Hey guys, just got my comanche a few days ago, and noticed the oil smells like gas and it gets pretty bad mpg for the 2.5l i4 5 speed. I'm talking has to be getting like 12 mpg and that was highway driving. I changed the oil and drove it home from 30 miles away, got home checked the oil and it was fine, just smelled like gas... It also is leaking oil into the air filter. However, it is not smoking and it doesn't seem to be having get up and go issues because it feels good compared to my mom's minivan hahaha. All that being said, can someone give me some ideas of what it might be and how to fix it, be aware I am a newbie and I don't really know much about cars yet, hoping to change that as time goes on. thanks!
robbie95 Posted April 26, 2013 Author Posted April 26, 2013 Probly blow by worn out rings wouldnt it smoke though?
87manche1 Posted April 27, 2013 Posted April 27, 2013 No only if oil gets blown back into the piston Or valve seals. Or U could also have a stuck injector check for fuel pressure bleed down. If that passes do a engine compression test
Geonovast Posted April 27, 2013 Posted April 27, 2013 I'd do a compression test, and change the oil, to see if it recurs. Gas can be pushed down past the rings without the rings being bad.
robbie95 Posted April 27, 2013 Author Posted April 27, 2013 No only if oil gets blown back into the piston Or valve seals. Or U could also have a stuck injector check for fuel pressure bleed down. If that passes do a engine compression test How do I do that?
87manche1 Posted April 27, 2013 Posted April 27, 2013 Go to autozone rent a compression tester. Should come with instructions. Or google it
87manche1 Posted April 27, 2013 Posted April 27, 2013 http://autorepair.about.com/od/enginetroubleshootin1/ss/compress_test_2.htm
robbie95 Posted April 28, 2013 Author Posted April 28, 2013 so, going to be taking it over to my friends dad place to get it checked out, if worse comes to worse and the piston rings are shot... I am gonna be looking for a rebuild kit, any recommendations on the rebuild kit? Eventually I am gonna rebuild it so might as well get the info now lol.
oldseddie Posted April 30, 2013 Posted April 30, 2013 If it is an early model with a mechanical fuel pump, you have a hole in the pump diaphragm.
Geonovast Posted April 30, 2013 Posted April 30, 2013 If it is an early model with a mechanical fuel pump, you have a hole in the pump diaphragm. The only MJ with a mechanical fuel pump is an 86 with a 2.8.
luvmyglock Posted May 1, 2013 Posted May 1, 2013 If it is an early model with a mechanical fuel pump, you have a hole in the pump diaphragm. The only MJ with a mechanical fuel pump is an 86 with a 2.8. Money. I think he's got just that config. Worth checking out.
Geonovast Posted May 1, 2013 Posted May 1, 2013 If it is an early model with a mechanical fuel pump, you have a hole in the pump diaphragm. The only MJ with a mechanical fuel pump is an 86 with a 2.8. Money. I think he's got just that config. Worth checking out. Except he specified 2.5 and his signature says 1991..
luvmyglock Posted May 2, 2013 Posted May 2, 2013 If it is an early model with a mechanical fuel pump, you have a hole in the pump diaphragm. The only MJ with a mechanical fuel pump is an 86 with a 2.8. Money. I think he's got just that config. Worth checking out. Except he specified 2.5 and his signature says 1991.. Reading comprehension: it's not just for first graders anymore!
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