Well successfully did the bypass and already feeling better about the rig although I still have a slight miss on 2 and 5 but I can start to now narrow that down as I think there are some big vacuum leaks like on the connection to the catalytic converter.
Couple of questions for those that have done this.
1. Do I need to maintain the connections to the catalytic converter? My assumption is that most of the sensors in this car are already failing or have failed but can I just cap those pipes and get rid of the tubes at this point?
2. What other vacuum connections are actually required? Since essentially bypassing the MCU with the nutter and since it controls almost all of the fuel/air and the various valves which ones are still actually operative? PCV, but remove the switch? EGR appears to run off the temp sensor in the manifold although mine is not connected that way, of course.
Any help would be greatly appreciated as I am diving into various other components this week including a new valve cover so having this crap out of the way would be great. I have the original repair manual which is great for walking through and making informed assumptions as to what is needed to still be connected but your insights are great.
You can get rid of pretty much everything except the PCV and CCV. You can even strip out all ECU related wiring along with the ECU itself. Use the wiring diagrams in the FSM to determine what is needed and what is not. Tedious but cleans up the engine bay really nice,
You hit that one on the head (no pun intended). Half the intake bolts were tightened like someone used a 1/4 inch drive. Hate to pull the carb again but it seems logical to redo that gasket too since they were so loose and who knows for how long. I guess it will give me a chance to do a serious inspection of the exhaust system too.
Thanks for the heads up to check those.
Okay, so an update on the 87. I no longer feel it is on life support but the patient has some issues still. Just got my weber to install but the way it mounts is a little hokey with all the controls (adjustments) in the back of the carb against the firewall but then they would say that is a Jeep issue.
I still have a slight miss and when tuning the weber it seems like I have a massive air leak somewhere but even with everything disconnected and plugged I could dial the idle jet in to like half turn out and that was the best tuning. I live at 3200 feet but that seems excessive even for the stock jets. Any other sources of leaks you guys can think of. I already redid the intake gasket and literally plugged off every connection. New EGR, new PCV, pulled the brake booster line and plugged that I mean I closed off everything.
Any thoughts where another leak might be?
I did a compression check on this beast and it is in really good shape 138 to 145 on all cylinders. I am frankly pretty stumped. I mean with compression like that I couldn't have a stuck a valve could I? I've got a little lifter noise which I attribute to sitting for several years and maybe that will work itself out, who knows.
Old 4X can you expand on the team rush upgrade? I thought I saw a reference somewhere to getting the parts for an 81 ford 150 or something like that to have that mid section piece and the matching cap but is that it for the upgrade?