Joined: Fri Jul 1st, 2022
Reputation Points: 22
|I recently put a new long block in my 1993 Ford Ranger XLT 2wd 4.0 l V6. when I first put it all together and tried to start it for the first time it fired right up, no hesitation or anything. Still today is starts right up but runs like you got 3 spark plug wires off. It jerks, it has no power, I might go 100 miles on a half of a tank or gas. I have replaced everything, plugs, wires, core, MAP sensor and so on, if you have a question on something just ask, I can recall all of them. New fuel injectors also. No smoke coming from tail pipe. I bought a OBD1 checker, and I am getting codes 172 and that seems to mean it is running lean, and code 177 which is running rich. I am at a loss to what to do to it, I have checked for vacuum leaks by pulling the hoses and checking for any holes, tears, or brittle hoses, and then I took Carb cleaner while it was running and sprayed it in every nook and cranny I could find, all the hose ends, the length of the hose and around every gasket I could find and reach, and nothing. I can usually find the problem on stuff, but this thing is whooping my behind, nothing I do makes it worse or better. I am just ready to get it running correctly. Please any advice ideas, you know exactly what my problem is just any help will be greatly apricated. I just want to thank everyone who takes the time to read this. Please help I did find out that the 02 sensors were plugged in wrong, the left on right and vice versa. It ran wonderful for a day and a half and started doing the exact same thing but now the check engine light does not come on at all. I have had gas come out of the tank when it is filled and I tightened the fuel hose going into the tank, but I still smell gas, is it possible that the new fuel pump/ sending unit could be letting air in and fumes out causing this rough running?