Engin speed varies on 1992 Ford Taurus

My engine speed goes up and down in park after car is warmed up. Put it in drive it sometime dies

by in San Jose, CA on January 17, 2009
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ANSWER by , January 18, 2009
My wife and I have a 2.5 that had the same problem. For us, we had to replace the IAC valve (Idle Air Control Valve). It ran with very low idle, and nearly stalled when put in drive. It cost us $50 to $60 and replacing required two bolts and unhooking the wires.First, have the codes read, then go from there.If you have a returnless fuel system, have the fuel pressure sensor checked out.