Re: 87 Ranger 2.9 miss need help
Psychopete gave you some good places to start. Too many posters don't bother to tell the mileage on their vehicles. At 170K+ miles with my 2.9L Ranger, I installed two pumps, two fuel filters, an ignition module, and rebuilt injectors before I got rid of starting and irregular idling problems. I had already upgraded the distributor cap, plugs, wires and a couple of sensors. Injectors were one of the main problems and tricky to install.
This engine has always run on synthetic oil and runs pretty well now, but I doubt that an engine with that many miles will still have the power it had when new. It has 3.73 rear gears and a 5 speed and the pick-up is alright but as I said before, the new 4 cylinder Japanese cars can beat it. It still doesn't burn oil, but the valve covers always want to leak oil. On the highway it will still collect a lot of tickets if you don't watch out. I need to run a compression test, it idles smooth enough, but it still doesn't run quite a smooth as it did. This is to point out that with 25 years and 170k miles, you do need to be thorough about maintenance. I have seen people in Texas driving cars that were running with a couple of dead cylinders, but that is not us.