My 87 RT4WD had been over heating for a little while, and I kept having to add coolant. So we did the head gasket, and since we were going to have the head and the manifolds off, my dad and I decided we might as well swap carbs to the Weber 32/36 instead of having to re-assemble the stock carb in all its vacuum glory. The over heating seemed to have been taken care of, but then it started climbing again (just past 3/4 of the gauge) after a 500km trip...added coolant this morning and it's been fine all day for city driving. Other than that both the lower and upper rad hoses are new and so is the rad - so I am waiting for my thermostat to come in and I will see if that will solve the issue.
Anyways that's a whole other issue - on to the carb problem. The engine is stock, but we gutted the cat before putting it back on. We also modified the stock air breather to fit the Weber, and tried to route vacuum to keep the the air coming from the exhaust shield into the intake when the engine is cold - using one of the ?thermo switches? on the intake manifold (but that doesn't seem to be working).
Right now, the issue seems to be a lack of power at higher rpm. The vacuum advance is connected (on the lower vacuum port - as per many threads) and the timing is lined up on the red mark. It idles great, but it doesn't climb up in the rpms like it used to. I will get to highway speeds and it stay there all right, but it feels like it has less power than before. We double checked all the vacuum and everything else we could think of and still nothing. I am not sure what the size of the jets are in the K726 kit, but we were thinking that it was maybe lacking fuel at higher rpm, so maybe a larger jet would be needed. We haven't checked the fuel pressure, fuel pump, and haven't changed the rear fuel filter, because everything worked great with the stock carb...
It's drive-able at least, so I can use it to go to work.
Any help is appreciated!
Mat
A few pics of the swap...
http://www.facebook....=1&l=c1d6456da0
Edited by loiselle.m, 08 November 2012 - 10:11 PM.