Hello again. As most of you know I just dropped my engine and removed the head and replaced all the valves and guides and seals because it kept lighting the check engine light for a P0303 error "misfire on cylinder 3" and this was on an engine with 36,000 miles.
Before the teardown I was getting a consistent 43 mpg out of it, but I really babied it. Now that it is all back together it runs alot stronger than it did before the teardown, but the mpg has taken a nosedive. Now it is a given that I am running the rpms up more as some of my friends here on the forum recommended that I do, but I'm getting about 33 mpg out of it. That's my observation from a couple of tanks of gas. Maybe the valves are a little tight? But losing 10 mpg is pretty drastic and I know it can do better. It has new plugs, belts and air filter.
The engine sound is a little louder to me than before. At idle it is really putting out the exhaust out of it's factory tailpipe. It blows the grass all around it as it idles.
I run the interstate to get home and by the time I pull in my driveway the exhaust is really hot and it smells like burned paint everytime. Could this new smell be from the Marvel Mystery Oil I added to the engine oil? I never added any to the fuel.
I thought maybe the flange gasket needed re-torqued on the exhaust. That would account for the loudness and also maybe it makes the fuel system richen up and therefore less mpg? But it's a major thing to get to it to check it, so I haven't done that yet. DCO
Before the teardown I was getting a consistent 43 mpg out of it, but I really babied it. Now that it is all back together it runs alot stronger than it did before the teardown, but the mpg has taken a nosedive. Now it is a given that I am running the rpms up more as some of my friends here on the forum recommended that I do, but I'm getting about 33 mpg out of it. That's my observation from a couple of tanks of gas. Maybe the valves are a little tight? But losing 10 mpg is pretty drastic and I know it can do better. It has new plugs, belts and air filter.
The engine sound is a little louder to me than before. At idle it is really putting out the exhaust out of it's factory tailpipe. It blows the grass all around it as it idles.
I run the interstate to get home and by the time I pull in my driveway the exhaust is really hot and it smells like burned paint everytime. Could this new smell be from the Marvel Mystery Oil I added to the engine oil? I never added any to the fuel.
I thought maybe the flange gasket needed re-torqued on the exhaust. That would account for the loudness and also maybe it makes the fuel system richen up and therefore less mpg? But it's a major thing to get to it to check it, so I haven't done that yet. DCO
