Grumble, grumble... I just wrote a reply, and when I came back in, it was GONE! vanished! grumble, grumble... ok, here goes again.
I am shopping for a used distributor. Found one for $75.
Garsh Tim, I sure hope that diz is really the problem, would hate for you to swap it out and spend the $$$ and find it didn't fix a thing, there still could be other problems. Sure ya can't do some testing first ?
Any tips on replacing the auxillary air valve that is underneath the intake manifold?
At the risk of going off-topic:
Jack the truck on the pass side, JACKSTANDS!, remove wheel. Remove the rubber mudflap in the wheel well (those plastic pins just pull out). You can now see the bottom of the valve. Disconnect the vac line to the top of the valve from the throttle body. disconnect the bottom vac line from the manifold. disconnect the electrical connector on the bottom of the valve.
Working by feel! use a 10mm combi wrench (or a ratchet if you can get it in there, might need 1/4" drive set...) undo the two bolts holding the valve to the mani. (remember that since you are working from the _other_ side of the bolt, not to _tighten_ them! The heads of those bolts are facing _away_ from you...) Throw the bolts away. Go to Home Depot and pick up two 2" long M6x1 bolts, two new nuts, locks, and flats to fit.
Slide the valve down far enough to disconnect the top vac hose. Leave the hose in there! Don't pull it all the way out, it's a $%^*( to get it back in.
Connect the top hose to the new valve, and slide it back up into place, and re-attach the top hose to the throttle body. The valve should be very close to it's proper position.
Take the 2 new bolts, thread on the nut first, then the lock, then the flat washer. Put some tape on the washers to keep them on there while yer blindly putting the bolts back in. When you get the new (longer) bolts started, thread them into the manifold about as far as the old ones were, then run the nut down onto the valve, and tighten the nuts.
The reason you want to use longer bolts is because you will find it nearly impossible to get your hand into a position to get those old short bolts started.
Look at this pic (courtesy of Steve "bob large") to see where the bolts are, cuz you will be working in braille. It will really help to have a mental picture of what you are feeling for.
Re-attach the bottom hose and electrical connector and yer done. You will have learned some new cuss words by now, don't use them in polite company!
Thanks to TroopaDoopa for the tip on the longer bolts!
ArmyBob, I've got a few TEK scopes here too... they don't get much automotive use, but sure come in handy when they do! ...
2DR LWB 4ZE1 5SP
bone stock DD