The car is a 1987 GL Wagon, EA82, 4X4 w/ manual transmission, 48,000 miles.
I posted a few weeks ago about a sudden problem with the car idling. It was running great and one night I parked it for 2 hours. Came out to start it up and the problem began, wouldn't idle. Car would start up and do the normal 2000 RPM surge until I depressed the accelerator to set the choke, and then it would die. To keep it running, I would have to give it gas and brake/gas it when I stopped to keep it running. The car would run fine once I got it moving though with no problems at all.
I have spent hours and hours on this forum just searching and reading related posts on this issue. I have replaced fuel filter, PCV valve, plugs/wires/rotor button/cap. I've used almost a whole can of carb cleaner checking for vacuum leaks with no luck. So basically I figured it was the Hitachi carb, because it gets gas fine but won't idle and has a TERRIBLE miss in it under 2000 RPM. So based on what all i've read on here about the Hitachi problems and how the Weber is superior, I ordered a kit on Monday and installed it today.
We installed the new Weber and everything went great. Dented the power steering reservoir to allow clearance for the electric choke, plugged all vacuum lines, and routed the PCV valve to the Weber air breather with 2 T's, as per what most everyone on here does. Hooked up vacuum to the disty advance and the EGR valve.
What happened when we started it up? Same thing with the Hitachi. No idle. The car starts up fine and shoots straight to the 2000-2500 mark, then if you touch the accelerator it will die and not idle. We went by the manual on all the tuning procedures with no luck. If the RPM's drop under 2000, the car still has an awful miss and spudder to it. Checked for vacuum leaks again and found none!
We put a cork in the hose going to the ASV for now, could this be the problem? If the ASV were to be bad, would it still matter now since the Hitachi is gone? We tried advancing the timing by turning the distributor some with no luck. I assume the timing is good due to the car running fine up to 80 MPH that I've hit while having these problems.
I'm puzzled on this problem. Can't find any vacuum leaks and the Weber is working fine, just no idle. The car was given to me for free, so I don't have anything in it other than the Weber and the tune up stuff, but I'm not looking to put much more into it. If I can't get this figured out, a for sale sign is going on it and I'm moving on. If anyone has ANY ideas or have had this same problem, please hep me out on this one.