Engine Performance problem. Brakes not receiving enough boost per brake installer.
1990 Ford Bronco V8 Four Wheel Drive Automatic 175000 miles
KOEO-84-EGR Vac. Solenoid Circuit Failure
22 -MAP out of range, 42-HEGO Indicates System Rich, 35-PFE or EVP Circuit above closed limit, 25-Knock Sensor.
Vacuum at idle reads 5 Hg at vacuum tree on air intake and into MAP, and 14 Hg going into brake booster.
EVP solenoid reads 3V at idle.
Recently replaced Vacuum hoses, ACT, MAP, TPS, FPR, EGR Valve, Front Rotors, Brake lines, Air Bypass Valve, Spark Plugs, Spark Plug Cables. Cleaned (and replaced gaskets)Throttle body, valve covers, rocker arms, valve springs. Also cleaned and rebuilt injectors.
Have not replaced TAD, TAB, or EVR solenoid or HGO. No cat conv. On this Bronco. Have not run WOT since changes, and have run 8 or 9 miles since
No knock sensor on engine, and they are no longer manufactured.
have the same problem?
Monday, April 5th, 2010 AT 5:29 PM