2005 Ranger Runs Good 80K Milage but when in park and idleing if I take it up to 3000 RPMs it starts Surging, Change Filter,Cleaned injectors,checed spark plugs. What next ???
The RPM and speed limiter both work by cutting off fuel injection. This is why it seems like it is surging... cause it is. Its having the fuel cut off and then turned back on. The same thing will happen if you hit the 90 something mph speed limiter.