Hello fellow Jeep owners and Weber Carb Owners.
I would like to hear from any Weber Carb owners for the 4.2L 258 I6 engine. My Jeep is the 89 Wrangler YJ. I have installed the new Weber K551 on my 258 and due to unclear instructions I am left with some "am I doing this right" type of questions. I would really like to talk with someone via the phone since I have to get my Jeep back on the road ASAP... and know it is setup properly. Also this would be one long post if I asked everything... so I will try to ask just a couple of questions.
I installed the K551 Weber a couple of weeks ago and was left with some of these questions:
1)Do I use my EGR and if so how exactly should it be connected? The instructions I had were not clear.
2) The instructions said I wanted the IDLE between 700 and 900, however the Weber tech support said it needs to be 400 to 500.
Anyone who knows the Weber and the low idle circuit knows you can't have the idle speed screw turned in more than 2 turns or you expose something called the progression port. And the mixture idle screw needs to stay between 1.5 and 2.5 turns out. If you are beyond these settings then you would need to change out the Idle Jet to a larger or smaller size.
Ultimately to get my Weber to idle at 520 RPMs without turning the idle screw in more than 2 turns I had to jump up 2 sizes to 85 in the Idle Jet. With absolutely NO load 520 RPMs at idle it sounds very good and very smooth, however put the AC on, headlights on, and the Automatic transmission into drive then the RPMs drop to about 400 RPMs or just below 400 if it has not warmed up yet. At this point the lights dim at night and you can see the battery gauge drop like there isn't enough charge going back to the battery. This just seems to me that the idle needs to be a tad higher. Anyway, Ron at Weber Tech support has helped a little, but mostly he doesn't want to talk unless you can give a HARD problem. He doesn't seem to have the time to answer the "is this correct" type of problems. He always says "What is the problem". Well I don't know exactly what the problem is, I just have questions about is it correct or not. Sorry... I started to vent. The last time I talked to Ron he told me to he thought I had a vacuum leak somewhere or I needed to advance my distributor. I currently am at 5 BTDC. He suggested going to advancing to 0.
Regarding the vacuum hoses I have replaced all hoses with new ones.. and in reality there are only a few that are still being used with the Weber. Basically the only hoses connected (vacuum or otherwise) to the weber are:
PVC Hose, Hose from air filter to rear hole on valve cover, fuel hose, vacuum advance from left side of Weber to the vacuum on the distributor, hose from the fuel bowl vent to the gas purge canister.
Other hoses still in use not connected directly to the Weber:
From a port on the CTO to the gas purge canister is what some call the Purge Signal vacuum. All other ports on the CTO are capped off. Well there is one port that seems to have a filter cap on it.
Sorry for the long post, but anyone who wants to respond or who is willing to talk to me via phone please reply here or send phone number and I can call on my dime via email.
Also here is a link to the exact email I sent to Weber with my comments and questions in case you want to read it and comment on it as well.
pics of my jeep at:
diagram of current vacuum and hose hook up:
Thanks in advance!!