need help with a couple issues with motor startup Options

[MrHyde]

got a couple issues I could use some advice on. 2316cc with weber 44's

1: CHT i gave a micro1000 CHT gauge.. its not reading anything.. i have it under #3 cylinder and its connected to the extension line and heat shrinked and on the gauge its red to + and purple to - . this is the only way it will go as one is a male and the other is a female connector.

2: carbs are running lop sided. right bank is pulling about 5 and the left side is pulling 12-14. this is with the idle speed screws backed right off. Any adjustments on the right banks mixture screws do pretty well nothing until closed and then is sputters a bit. Adjusting the mixture screws on the left side start making changes to the idle and sound of th engine immediately..

3: voltage gauge is not reading anything but the idiot light does go out once the motor is running

4: fuel gauge and the temp gauge ( in combo gauge) are both pegged.. I think this is most likely ground. i'll check that in a min. I only put a couple gallons of gas in the tank.


side note.. once motor was warmed up doing cam break in the oil pressure was steady at a hair over 20psi andi only have one small drip of oil on one valve cover, which i'll look at when i do a valve adjustment.

[ThePaintedMan]

Lots of good stuff from Dave and Mark. Checking for a vacuum leak is easy, but be careful. The easiest/cheapest is to start the car, then slowly spray carb cleaner around any of the junctions, from intake-head and from carb-intake. If the idle changes at all, you have a leak. This would be done ideally with the linkage disconnected.

Mark is right, if the carbs are not rebuilt, you could be opening yourself up for additional headaches. However, the reason why I still feel it's synch-related has to do with your guage readings. Physics/mechanics dictates that if one side of the engine is pulling 12-14 "units" of air through it (those don't stand for CFM, by the way) that the other side of the engine should want basically the same thing. However, if the throttle plate on that side is closed, or closed more, it's not physically possible to pull the same amount of air through the carb. The bottom half of the carb is still working, providing fuel and that ultra-rich fouling that you observed. But the same amount of air isn't entering.

OR, you have a massive vacuum leak on the 3/4 carb, which would cause the numbers to be lower, BUT the plugs wouldn't foul - if anything that side would be super lean.

Mark is closest, and one of the guys I learned a lot from reading here, so I'm sure he'll help you get this figured out. (IMG:style_emoticons/default/beerchug.gif)