Tknutson58k
Veteran
So I got my '07 GT back that I used to own and the previous owner left it outside and some mice got in the air box and what looks to be piss in the throttle body the engine cranks but only backfires every now and then the plugs are firing so the coils seem to be good but after cranking for a bit it develops a quite a bit of pressure coming out of the breather so is a ring stuck or a valve not closing or what could be the remedy. The battery is brand new also.
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i would bet on a stuck valve.
Tknutson58k
Veteran
Must be on the exhaust side then, all 6 intake valves open and close. It's got me puzzled as hell. Does anybody know what codes can be on but the engine still start like the intake air temperature and intake pressure sensors are disconnected but it didn't start with them on either
Shoot some starting fluid in there and see if it goes. Have you checked compression?
Tknutson58k
Veteran
Hey Cannondale good to see you're still around these parts! So last night I took the valve cover off and all the tappets appear to be soaked in oil and moving free. I can shoot starting fluid down the throttle bodies and it doesn't do a thing. Can you actually compression test these with the auto decompression, I'm wondering if that's what I'm hearing coming out of the breather
Yes you still can. For this all you really need to know is if there is enough to fire it. Just remove plugs and put your thumb over the hole crank engine.
I am always lurking here. Still have my Phazer!
Tknutson58k
Veteran
Do you think it's possibly just really old bad gas... It has like a fog of unburnt fuel coming out the pipe along with blue flames.. every time I pull the tank off and take the plugs out they are pretty much dried not soaked by any means Even the plugs that were in it when I got it back still fired super good
Tknutson58k
Veteran
Also the injectors click like they should but how does a person know if they are actually letting fuel into the throttle bodies
74Nitro
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Have you tried BRAND NEW plugs? Just because they spark , doesn't mean they work.
Tknutson58k
Veteran
Yeah they were brand new, it didn't change a thing.
I think you have a stuck ring. Need to at least check for compression with your finger.
sxr70001
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Maybe put a little atf down each cylinder overnight and then try it. Can’t hurt if your looking at a tear down anyway.
Tknutson58k
Veteran
Thanks guys ill take the tank off to check compression, and a little atf can't hurt, I just don't understand why I have so much breather pressure. If I plug the breather tube with my finger I can hear air/oil bubbling in the oil tank and it literally comes out of the top if I have the full plug out.
Tknutson58k
Veteran
The rings should be at static pressure against the cylinder walls when it would have gotten stuck so I don't get how that's literally keeping it from re starting
