Down we go

[cbr600rx7]

So it looks like I have dove down the rabbit hole on my 93 2.3. Over the last few days I have started to replace miner things and take care of a few misc repairs. Well after putting 700 miles on her in the last two days I found my self diving into some more significant and over do maintenance. I noticed the truck was hesitating a little bit and when coming to a full stop she would some times stumble so I replaced the very old fuel filter and this made no change. Looking into her a little more close I found the IACV bottom bolt had backed out and the valve was not seated well. I also noticed a huge amount of oil built up in the TB so I figured I would go ahead and clean it. Since I now had the TB out of the way I figured I should just check one spark plug on the drivers side and sure enough the plugs and wires are extremely old and desperately in need of replacing. So at this point I figured I was all in and pulled the upper intake manifold so I could get the remaining plugs out.

The spark plugs look like older auto lights but the gap had gotten so big

 

[Mark_88]

Did you check the PCV or replace it? Oil in the TB could be a result of the PCV being plugged or not working and oil gets forced out through the valve cover vent and ends up in the TB.

They should be changed more frequently than once in a lifetime which is usually the case but I tried to change mine once a year at least.

 

[cbr600rx7]

Yeah the bottom hose wasn't even hooked to it and it was just hanging from the hose coming off the manifold. It was motorcraft EV-147 for the part number if that is what you are referring to.

The valve it's self was in rough shape and probaly doing nothing but causing a vacuum leak.