4G64b with positive pressure coming out of intake.
Posted: Sun May 04, 2014 9:33 pm
Hi All,
Relatively new here, but I've been utilizing the site for trouble shooting and ideas for my 1988 US version L300. I've run into a problem after the rebuild that I'm not able to figure out, and am hoping someone will be able to point me in the right direction.
A little back story about my US L300(ie van wagon). I recently rebuilt the 4g64 petrol engine, and thought I did a good job as I've done a few rebuilds in the past. I do have the both service manuals for the year and followed the instructions carefully. The head was done, and the bottom end as well. I installed all the internals, in the correct order and direction. As I said, I thought I did a good job at putting it all back together and back into the van. Not the easiest thing to put back in the van, glad I had another set of hands. Everything looked good, I didn't change much from before the rebuild. I did changed the wires, cap, rotor, fuel filter, plugs, all the timing components. I eliminated the balance shafts, with a balance shaft elimination kit. I also removed the jet valves and filled the holes with specifically designed bolts(found a kit on line for the Mitsubishi engines).
So once in, I thought it would start up with very little fuss. It didn't. It turns over. It has good even pressure in the combustion chambers. There is a good spark at all the plugs. It's getting fuel(I can smell it and see it spray out of the plug holes when the plugs were out). I believe the exhaust system to be clear of obstructions. It is timed properly, or at least as close as I can get without it running. The timing belt looks to be on correctly, at least the marks line up. I've checked lots of things in the hopes that it would be something simple. I just happen to be turning the engine over without the air intake hose attached and noticed that I was getting fuel spray out along with air. It only happens once per revolution, as it feels like there is a bit of vacuum in the revolution. It's hard to tell, due to the speed of rotation. Do I have a stuck valve? Is the EGR valve stuck open? Did the elimination of the jet valves cause this? Or something else?
Any help would be great.
Cheers,
Jason
Relatively new here, but I've been utilizing the site for trouble shooting and ideas for my 1988 US version L300. I've run into a problem after the rebuild that I'm not able to figure out, and am hoping someone will be able to point me in the right direction.
A little back story about my US L300(ie van wagon). I recently rebuilt the 4g64 petrol engine, and thought I did a good job as I've done a few rebuilds in the past. I do have the both service manuals for the year and followed the instructions carefully. The head was done, and the bottom end as well. I installed all the internals, in the correct order and direction. As I said, I thought I did a good job at putting it all back together and back into the van. Not the easiest thing to put back in the van, glad I had another set of hands. Everything looked good, I didn't change much from before the rebuild. I did changed the wires, cap, rotor, fuel filter, plugs, all the timing components. I eliminated the balance shafts, with a balance shaft elimination kit. I also removed the jet valves and filled the holes with specifically designed bolts(found a kit on line for the Mitsubishi engines).
So once in, I thought it would start up with very little fuss. It didn't. It turns over. It has good even pressure in the combustion chambers. There is a good spark at all the plugs. It's getting fuel(I can smell it and see it spray out of the plug holes when the plugs were out). I believe the exhaust system to be clear of obstructions. It is timed properly, or at least as close as I can get without it running. The timing belt looks to be on correctly, at least the marks line up. I've checked lots of things in the hopes that it would be something simple. I just happen to be turning the engine over without the air intake hose attached and noticed that I was getting fuel spray out along with air. It only happens once per revolution, as it feels like there is a bit of vacuum in the revolution. It's hard to tell, due to the speed of rotation. Do I have a stuck valve? Is the EGR valve stuck open? Did the elimination of the jet valves cause this? Or something else?
Any help would be great.
Cheers,
Jason