I have a 2000 Ford Ranger. My ranger won't start unless I give it gas, something that it's never done before. Once I get it to start it won't idle on it's own. I can drive it as long as I don't stop. It'll die as soon as I hit a stop sign or a red light. Could this be the fuel pump? Anybody got any ideas. I saw this exact problem on another forum but they didnt answer the guy.
It sounds like you have developed a vacuum leak somewhere on the engine. A loose or cracked vacuum hose will cause the problem you are describing. Hope this helps.
Sounds like a bad IAC (Idle Air Control) valve. It's right on top of the throttle body - looks like a small canister about 3" long and 1" in diameter. You can take it off and clean the pintle with throttle body cleaner, or replace the whole thing for about $50.
I have figured something else out. When it is parked on something flat or downhill it works fine. But when it is parked up a hill it will do what i described above.
Go with what IHC said earlier, that was my first thought when I read your post. Clean that little sucker, and then change your fuel filter. There might be just enough restriction in the filter to keep the pump from pushing fuel up to the system. If that dont work, then you need to get your fuel system pressure tested, to make sure its meeting minimum requirements. Your TPS could also be bad and not indicating to the PCM that your truck is at idle.
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