Excessive High Idle
Hello from a new member.
Here's my problem. I've got a 90 3.8 n/a with high the famous high idle problem.
I just picked up this car and I'm getting it ready for daily use, So I did an oil change, new plugs/wires/cap and rotor, and a new coil.
it was running really rough when I picked it up, that's why i decided to do all the maint. that I've done so far.
I even pulled the EGR and the IAC and cleaned them as well as the upper plenum.
When I finished the upper plenum I painted it and put it back on the car and used new gaskets for everything.
when I started the car, it still idled rough...blew black smoke horrible and fouled my new plugs...multiple cursewords and a beer or two later, my friend comes in and tells me the MAP sensor vacuum line is not connected.
I go and look, sure enough it's not connected, and there's nowhere to connect it.
ARGH!!! Well I go to NAPA and get a "T" and cut the top vacuum line on the intake and fit the "T" in between the cut line and the MAP sensor. I put the cleaned up plugs back in the car, replaced the wires and fired it up.
Much smoother running and no black smoke, it just idles really high. I unplugged the IAC, no change, I unplugged the TPS and it made no difference.
I'm at a lose
Any Ideas guys??
Any help would REALLY be appreciated.