80 Toy 4wd truck 20R running problem...

1. Do you have the Haynes manual with the troubleshooting section for this vehicle? Oftimes that helps a lot faster than we can.

Double check the vacuum advance hoses to make sure they aren't kinked or something isn't in them.

Do you smell any gas when you're having to hold the accellerator down or when it's running rough?

Charles of Kankakee

Vaccuum hoses are like new and all of them are connected. No I dont smell gas although I am suspect that its reall sensitive to flooding easily.. So it might be a happy medium of pumping the gas when starting it... I am not sure if its flooding or starving... No obvious smell of gas though.. Thanks

The condition is referred to as a "hot soak hard start." That is, get the engine good and hot, then while it is sitting for about a half hour, it is soaking up all the heat generated by the engine, exhaust, etc.

When you start a cold engine, you depress the pedal all the way to the floor to set the automatic choke. Try giving pressing the gas pedal only halfway when starting a hot or warm engine to see if that helps.

Look at the fuel level in the carberetor bowl - there is a sight glass on the side of the car with notches halfway up the window. The fuel level should be right at the notches.

Make sure the heat shield is in place over the exhaust manifold. If it is missing, the heat from the manifold can evaoprate the gas in the carb. The heat shield should have louvers on it. If it doesn't, then have the truck checked for the exhaust manifold special service campaign.

Check to make sure the air filter element isn't black with soot. If it is, the exhaust manifold may be cracked.

Sorry, no experience with conversions.