par car wont start

polarisdescent

i have a 1990 gas par car just had the cylinder bored to 30 over new piston and rings and a new starter solenoid. when i try to start it it goes so far and queits. when i take the plug out it turns over fine . can anybody help thanks

BGW

__________________
This advertising will not be shown in this way to registered members.
Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum

Just Ducky

May I ask if you opened up the intake or exhaust after boring out the cylinder?

polarisdescent

yes i did is there a certain way to put the piston in there is a hole on the piston skirt which way should that be facing? i had it facing towards the carb

Just Ducky

I'm going on a basis of a lifetime of experience with numerous motors, so I may be making a leap in the wrong direction, but I think you will need to balance the intake and exhaust to match the larger bore of your motor. What you are describing sounds like what used to be called "Vapor Lock". Basically you are creating a vacuum that can't suck in enough air through the intake to fill the void. Also on exhaust you would find the piston working too hard to expel the gases due to the restriction. That's my informed guess as to why you can get the piston to move without the spark plug in the head.

Here's something to help you see the process. http://science.howstuffworks.com/tra...wo-stroke2.htm

If you watch the animation you might get other ideas about what's wrong.