By JeffR (144.141.47.14) on Thursday, February 28, 2002 - 01:10 pm:

I have completed the swap. The car idles fine but when you excelerate, the car stalls or falls flat on it's face. A little back ground. I used the Keihin Carb from the 79 CVCC because the 83 accord carb had a electric cholk and had additional vacume lines in the carb and base plate. I know the 79 carb has less CFM then the 83 accord but I was willing to give up a bit of performance to make hook up easier. I don't know if I need a new carb or if there is something wrong with compatibility. The 83 accord had a air suction tube, that is what it is called. The tube went from down on the exhaust manifold up into what is called a "air chamber or valve" and then was routed into the carb base plate. Could this be essential to allowing this engine to operate correctly. I know it could be the carb but wanted to get some inpute from someone that may have done this mod before I went and bought a new carb. I know allot of people have done an EK1 mod but not sure on a 83 EK1. The 83 had the highest HP of all of them.

Thanks

JeffR

By Paul Krummenacker (12.145.208.12) on Thursday, February 28, 2002 - 01:29 pm:

I haven't done this swap, YET. Actually I have an 82 EK1 (sitting in the back of my truck) that I am going to install into my '81 Accord.

I know the tube you are talking of


that goes to the air tubes at the top of the motor. I wold suggest you look at my chart that I'm making, http://www.liepoldfarms.com/rally/76_83_engine_tranny_specs.htm

of course I don't have the 83 or 79 specs up yet, but basically what I can guess is the 79 carb is similar to the '80 and the '83 is similar to the '82.

Given that, you'll notice that carb venturis seem to be the same size on the '80 and '82 (strange the '81 seems to be larger, I'll have to measure that to see if my chart is accurate.)

What I'm guessing is since the '83 has this EGR system that sucks more unburned fumes into the mixture, and you are using a '79 carb that wasn't jetted for this mixture, you are running the mixture too rich.... now I could be totally full of BS.. but I'm guessing you are either too rich or too lean.

what I was going to do when I build my '82 EK1 motor up, was to elminiate the EGR tube and just cap the hole in the exhaust manifold and elminate the air chambers on the top of the system. I'm also elminating it because it is going in a race car that won't have to go through the smog nazis.

without having the motor in front of me,I'm wondering, is there anyway to block off the EGR tube at the carb and see how the car runs withit blocked off?

I have photos of an '82 EK1 at: http://www.liepoldfarms.com/rally/ek1_82_rebuild/rebuilding_a_1982_ek1.htm

My guess is that you've got a mixture problem due to the EGR system.

anybody else?

By JeffR (67.219.93.151) on Thursday, February 28, 2002 - 07:28 pm:

Thanks for the response Paul. I removed the egr valve and capped off the area on the intake manifold with a metal plate. I know the venturi's would be smaller on my 79 Carb, thus loosing a little bit of power but am unsure as to why I have this excellaration problem. Once again I used the existing 79 carb and base plate as to eliminate a bunch problems with extra hoses and stuff. Another example of what the problem is if I am sitting still idling, and I slowly press the excellerator, it starts rev up as I push it more and more and the rpm's increase it hits a point and goes completely flat and bogs down. Some one said it might be the excellerator pump in the carb. I am not a carb man. As far as the air tube in the photo, that is just like mine. I capped it off at the exhaust manifold and got rid of the rest. All help and suggestions are appreciated.

Thanks
Jeff

By Adrian (Civicguru) (165.228.11.61) on Thursday, February 28, 2002 - 07:44 pm:

It's accelerator dammit, accelerator!

By mike adams (206.58.33.68) on Thursday, February 28, 2002 - 07:50 pm:

I'm having almost the exact same problem with my 75 civic cvcc. everything you describe is how it runs. I thought it might be my dwell on the points, but if you're having the same issues on an electronic ignition then maybe i'm way off. Could just be getting enough fuel until a certain rpm range and then cutting out because the carb can't handle it. I know there is an accelerator pump in the carbs, but I was also told to just rebuild mine and make sure it was clean and so was my fuel. If anyone can figure out Jeff's problem, maybe that can give me some clues to mine as well!

By JeffR (144.141.47.14) on Friday, March 01, 2002 - 09:22 am:

Where are the Carb experts at? OK, OK, ACcelerator! I guess I was thinking because it was not ACcelerating it must be EXcelerating. That seems to be the symptoms anyway.

JeffR

By Anonymous (65.101.3.145) on Saturday, March 02, 2002 - 06:49 am:

acceleration = exhileration!

By Anonymous (203.96.111.201) on Sunday, March 03, 2002 - 02:28 am:

not sure if this is any help but i had the same problem in my '76 but then it has less electronics to tamper with...in the end it was the fuel shut off valve in the carbie from the 83 1500cc sports that i had fitted for xtra fuel intake...it was faulty and did kinda the opposite to what it was ment to....flooded the chambers when i took my foot of the gas and starved the carbie when i put my foot down...just a thought but i'd be startin at the electric fuel pump if your usin one and lookin at the lil filter pads that are in the lines...."not the inline filter" as ive had to repair many a honda citys with the problem. reguarding the air tube from the manifold to the carbie...this is usually only a air regulator on this model vehicle that works in connection with the air filter valve to give a mixture of hot and cold air into the intake point as a more direct feed rather that just blowing it into the top of the carb as a air cleaner box does so i'd suggest trying to link it up as seeing what happens