5 replies to this topic

[Kain]

i believe that i have all of the plugs on the carb correctly, but what all else needs to be plugged, or have a line going to it? car dies if you let it go below 2700 rpms and i've messed with the mixture, and idle controller with no results, except for no backfires and running a bit smoother. Only other thing i can think of is a vacuum leak somewhere, but i can't figure out where.

[Omega Mugen]

Kain,

Check the vacuum diagram posted under the hood or get a copy from the manual link on this site. All the vacuum lines have white numbers printed on them. These numbers correspond to the numbers on the diagram.

Are you using the stock USDM carb?

[Kain]

oops, i suppose i should have mentioned that the emissions boxes have been removed. yes, it is the stock usdm carb. looks just like this one: http://www.redpepper...gallery/albun80

the diagram doesn't really help me much, as most of the lines are gone and i only need to know which ones are necessary for it to run normally.

but, would a vac leak cause it to not BE ABLE to idle below 2700 rpms or so? cuz if i take it any lower it just dies.

[Omega Mugen]

It could. Is your throttle snapping back all the way? Are your butterfly valves returning to all the way closed without your foot on the gas? Are you waiting for the car to warm up? Will the idle go down after the car is warmed up? A closed choke will make the idle go up to around 2000-2500RPM. That is normal.

[Kain]

i haven't got to look at the choke and throttle when it's running much, i'll have someone else in the seat next chance i get to see.

yes, i let it warm up, and it went down from 3000+ to about 2700. then if i mess with the idle controller to lower it, it just sputters and dies.

edit: it also has a manual choke, if this makes any difference, but it is all the way open i think, not positive though.

Edited by Kain, 13 December 2004 - 11:51 PM.

[Omega Mugen]

Make sure the choke is all the way open when the vehicle is warm. All the vacuum lines are basically for emissions purposes, other than the ones that open the secondary. Is your secondary hanging open? That'll make your RPMs go up too.