maintenance epidemic!

​Holy cow, when it rains it pours. Ive got a fleet of vehicles that decided they want attention, all at the same time!

So friday the green bronco popped a P0707, transmission range sensor. That's an easy one, order a new MLPS, which i just got and installed this morning after work. So that's one fixed.

So i was driving the diesel all weekend; well last night it decided to blow the temp probe for the pyro out of the manifold!

​This is probably going to suck to fix. There is a little tiny set screw in the fitting that locks the temp probe in place, and after 15 years its pretty well seized in there. Got it soaking currently, hoping i can get it to free up and come off the probe. If not ill cut it off the probe and worst case replace the probe. We'll get back to this after a couple days of it soaking in penetrant.

So i drove the wife's 90 to work last night, and of course its running rich and popped a CEL

Pulled codes, all i got is a 42, system rich.
Swapped the MLPS on the green one while i waited for this one to cool off, then pulled the plugs. Yup, its running rich!

​Every plug is covered in soot, except for #4

​Check fuel pressure (chart for reference)

KOEO - 40 PSI. KOER - 36 PSI. Unplugged FPR and it jumped to 42 like it should. No fuel in vacuum line, and the system doesnt bleed down.
So i decided to look at the vacuum lines even tho theyre all new from a couple years ago; all good. I pulled the steel vacuum cannister off the bracket and spotted this

​So either this was leaking the whole time, or i caused it when i took it off the bracket. Either way, i cant see why a vacuum leak in between the manifold and the EVR solenoid would cause a rich condition. And it never threw an EGR code anyway. Out of time for the day though, so will continue looking at it tomorrow.

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