I have an 1986 Ranger. 2.9L AOD 4WD Super Cab 92,000 miles. I has a SEVER hesitation problem. The problem is not consistant it does it whether it's hot or cold. The truck has been to 3 well known mechanics and it has baffled each of them. Each of them have done nearly the same test and checks. Fuel PSI, checked all the electronics (Fuel Reg, Idle bypass, O2, MAP & temp sensors) and shake tested all the wireing. No codes are present. We did a bottom up tune up cap, rotor, wires, plugs, checked timing, compression and cylinder leak down as well as checked fuel PSI. Although the fuel PSI is within tolerance it's on the low side at 22 PSI. The first mechanic did r&r the fuel pump and changed the fuel filter but, the PSI did not improve. When the motor starts this hesitation, the fuel pump wines, loudly but, it still carries the 22 PSI.
have the same problem?
Monday, April 30th, 2007 AT 9:03 PM