Bought my 95 F150 about 5 years ago. CEL came on when I test drove it, about 5 minutes into warm up. "Don't care", thinks I, and I put down my six Benjamins and got myself a run-around-truck.
I scanned the codes back way back when, doing something stupid with the battery positive terminal, one of the diagnostic terminals, and a light bulb. Results were inconclusive-- I couldn't even figure out if I had 2-digit or 3-digit codes by the counting of the flashes.
The internet being what it is, I found better instructions on a youtube video today. Jumpered the "lower left" terminal in the "block-of-six" to the "lonesome" one, keyed on, and read the CEL flashes.
Got a 1332 and a 332, maybe a 322 as well. This is hard! But they all look like EGR stuff.
I lost my mity-vac in the chaos that is my garage, so I dug up some 1/8" aquarium tubing and sucked on my EGR valve while it idled. Actually changed something, so the valve is good. Bravo!
Back tracked the vacuum lines and found "the can" had suction going in, but not out. Further, the hard plastic line from the can to "solenoid land" was clogged.
Never fear! Ripped all that stuff out. Direct wired the manifold vacuum to "solenoid land" with 1/4" hard tubing and all diagnostics are happy. Plus, it idles mint. It ran good before but great now. I found a 3/8" vacuum line not on my under-hood schematic that goes straight to ported vacuum via a solenoid hiding in the intake manifold. Plugged that with a bolt.
Truck has always returned 12 MPG, which I sort of care about, as it only has 2.73 gears and can't get out of its own way. 12 MPG is 3/4 ton territory for me, IMO.
Pics for the curious!
The mystery line, with bolt, without can:
Leftover junk:
Emissions diagram. My mystery line is probably charcoal-canister or fuel vent related, but, meh.
I scanned the codes back way back when, doing something stupid with the battery positive terminal, one of the diagnostic terminals, and a light bulb. Results were inconclusive-- I couldn't even figure out if I had 2-digit or 3-digit codes by the counting of the flashes.
The internet being what it is, I found better instructions on a youtube video today. Jumpered the "lower left" terminal in the "block-of-six" to the "lonesome" one, keyed on, and read the CEL flashes.
Got a 1332 and a 332, maybe a 322 as well. This is hard! But they all look like EGR stuff.
I lost my mity-vac in the chaos that is my garage, so I dug up some 1/8" aquarium tubing and sucked on my EGR valve while it idled. Actually changed something, so the valve is good. Bravo!
Back tracked the vacuum lines and found "the can" had suction going in, but not out. Further, the hard plastic line from the can to "solenoid land" was clogged.
Never fear! Ripped all that stuff out. Direct wired the manifold vacuum to "solenoid land" with 1/4" hard tubing and all diagnostics are happy. Plus, it idles mint. It ran good before but great now. I found a 3/8" vacuum line not on my under-hood schematic that goes straight to ported vacuum via a solenoid hiding in the intake manifold. Plugged that with a bolt.
Truck has always returned 12 MPG, which I sort of care about, as it only has 2.73 gears and can't get out of its own way. 12 MPG is 3/4 ton territory for me, IMO.
Pics for the curious!
The mystery line, with bolt, without can:
Leftover junk:
Emissions diagram. My mystery line is probably charcoal-canister or fuel vent related, but, meh.