I have a 1987 Ford Ranger 2.3L 5 speed, with 139,000 on it, and about 12,000 on the engine.
The problem I have is that the engine surges from 3300-2700 RPM. It does not matter if I am on the highway, or parked. So far I have replaced both fuel filters, the low pressure pump, fuel pressure regulator, EGR valve. The fuel pump was dead, and the EGR diaphram was torn.
I have 32 PSI of fuel pressure at idle, 40 as soon as it speeds up. I have also connected and disconnected the EGR, and ther is no avail. The vehicle behaves the same wether its warm or cold. I also have a top speed of 62 MPH.
Any help? PLEASE?
Thursday, October 18th, 2007 AT 11:43 AM