I thought I should follow up with a little more info. Now that's it's getting warmer (except for today) the van has started to hesitate under accel, but is fine at idle. When it was still a little cool out it would do this until the engine was warm, then it was fine. Now that it is warm out it hesitates under accel all of the time, almost like the butterfly on the intake is not opening enough (old carb guy). Since it has 80k on it, I changed the cap and rotor, and the fuel filter as they needed it anyways. Also cleaned the MAF with the proper cleaner. Still has issues. Now that it is cold today again, seems to run ok, although I just drove it down the street (didn't want to get too far away and have it die).
Backstory: The van ran great, no problems, until this winter when I found out I had no heat. I changed the radiator coolant, and when I went to change the thermostat I broke one of the bolts for the stat neck (crap!). It was rusted in there pretty good. I tried several lubes and rust free's to no avail, and broke off a couple of easy-outs along the way; man there is just no room to get at it easy. Anyways, after bleeding knuckles, frozen fingers, and lots of cursing, I decided to let someone else try that maybe had more/better tools to get it out. After a few phone calls I took it to my local mechanic to give it a try. They had no better luck and suggested that a manifold replacement was in order and had found one from a local scrap yard. After changing out the manifold and swapping all of the components, all was good. But remember that this was while it was friggin' cold in lovely MI. Now that it's warming up poof, cough-hickup-burb -- I don't want to accelerate.
So with the above repairs and then I decided it maybe was the fuel pump, but I thought I'd check the fuel pressure first. I rented a fuel pressure gauge kit from Autozone (put a deposit down, and get a full refund upon return --- FREE use! can't beat that). During the hookup of the pressure tester gauge I found out that the vacuum line from the air intake tube was not connected to anything on the other side. After first searching all around that side of the engine I called the local Ford dealer (their repair dept is open on Sat, but only to 2pm and it was already 1:50). The told me I was looking in the right place and it should be on the pass. side rocker or right there somewhere. Still haven't found it and decided to look on the net and found this great site.
Long story short, I know the shop probably is responsible for this, but I would like to have a vehicle to drive to work on Mon
. Any pics, drawings, etc. that shows where this line hooks up will help immensely.
Thanks to all for the help in advance.
Brian
P.S I forgot to mention that the fuel pressure seems fine, although it takes a couple of key-on-key-off turns to get it up there to 30 psi. Running at idle is 32 psi. Rev press is at 35-40 psi. Due to the under accel condition I checked the pressure with it in drive (brakes fully pressed) and rev'ed, 35 to 40 psi no problem. I also disconnected the Fuel Pressure Regulator vacuum at idle to see if it made a diff and it did (bumped it up from 32 psi to ~36 psi). Thanks!!
