I have an 82 civic with an EK1 engine with a weber carb. I am having a lot of problems with this carb and I don't know why. the engine idles really rough and acts like it's starving for fuel when it picks up speed. the low speed adjustment needle does nothing. I took the carb apart twice now to make sure that is completely clean and in no way stopped up. the fuel filter is clean. the only thing I haven't done is change the fuel pump and this is where my question is. the pump flows a lot of fuel but doesn't seem to have any pressure. how much pressure should this carb have to run right? anything else I should check?

 

Carbureted cars run low fuel pressure, especially compared to EFI cars. Something like 5 or 6 psi, I think, where a fuel injected car runs around 40 or so.


That being said, have you looked into a possible spark or compression problem? It seems you have verified the carb is clean, so one must assume you're getting fuel. The only other things it takes to make an engine run is spark and compression. Check the plugs. How about the coil? Plug wires? Distributor cap and rotor? What shape is the engine in? Rings? Valves?

Good luck!

 

thanks

the compression is 150 to 160 psi on all cylinders. plugs are new. I reset all the valve lash. cap and rotor are fairly new. I don't know how to test the coil or plug wires. I know I get a healthy blue arc when I test it with a screwdriver in the sparkplug wire

I don't think this fuel pump is kicking anywhere near 5 or 6 psi. it litterly takes nothing to stop the pump.

 

Is there any timing marks on the bottom pulley. I was going to put a timing light on it and can't find any marks or any thing to line the marks up to if there were any.

 

after a search on google I found out I was looking on the wrong end of the engine.

 

If the low speed needle doesn't do anything, then you need to change out the idle jets. When you get the jetting right, the idle screw will be very sensitive. Only 1/4 turn to make a huge difference. I've got a 32/36 on my EK1. What idle jets are you running?

It should not take much to stop the fuel pump. The stock Honda pumps shouldn't put out any more than MAYBE 2 PSI. The Weber's float valve will not stop the fuel flow if it's anywhere above 3PSI.

 

turns out to be a timing issue. we took the head off because it had a broken head bolt when I bought the car. I timed the cam with the line flat with the top of the head when it should have been timed to the arrow. I also set the distriutor timing with the vacuum advance disconneted. I got a manuel and did things right now it purrrrs like a kitten..