So, with some warm weather that came in the past week up where I live. (Sadly it was only in the mid 50's but I'll take it.)

I decided to take out my Mazda*, to work and such. I have noticed after 20 minutes to an hour of spirited driving, it has started to spew oil out of the breather. I suspect I already know what that issue is. However my main issue, is when I stop off somewhere like a gas station, it has a hard time firing back up. I assume this is due to heat soaking. The fuel lines are are a bit warm, but nothing to cause of concern, the carburetor is also warm, but thats normal. I cannot for the life of me figure out why its doing it in 50 degree weather. At 65f to 85f, it runs like a champ with no heat soaking issues.

So, is there anyway to fix this issue, and what exactly would be causing it? Since I'm nowhere near Arizona temps.


* My B2200, is a '90 with a 5 speed.

 

First confirm that it is heat soak.
Spray starter fluid directly into the carburetor if it starts and runs it is not likely heat soak.
Then do the usual. Follow al the fuel lines to the carburetor. If any are too close to the engine or exhaust the fuel may be warming inside the lines and shooting off the engine stops the flow and increases the problem with heat in the lines already there and supported by the normal heat soak all engines have when you first shut them off. If this is the case reroute or thermally cover the fuel lines.

LOL I just realized I could go and on about resolving heat soak....... there are so many conditions and causes of heat soak if in fact you first conclude it is in fact heat soak! So I suggest start with the first things I mentioned?

 

Well, I AM in Arizona temperatures, and I don't have this issue (1988 B2200 Cab Plus 5-speed, genuine Redline Weber since 2005).

So it sounds like your truck cranks the engine fine after a stop when the engine is hot, but just cranks and won't start. So I want to know if you just try to start WITHOUT touching the gas pedal at all, that's what one should do with a carbureted vehicle.

 

Sorry for the late reply. Washington weather, decided I'm going to frigid temp's, and rainy weather. So I tucked the truck back in the shop for the time. That was until yesterday, it was a beautiful morning so I took the B series out, and it happened again. Popped the air cleaner off, sprayed starting fluid down its throat, and did not touch the gas pedal. I tried cranking her over, and the starter was just spinning.

It would not fire. Checked the fuel lines, all warm not hot at all. Pressure was at 3 lbs. So I threw a little bit more down her throat and still nada. Gave her a pump while cranking, she barely started. Sounding like she was running on 2 maybe 3 cylinders out of the 4.

 

I have tried that, and nothing, almost made the battery go flat from how much cranking I was doing.