Cold Stalling F150

courtesy of Bob, The Auto Answer Man


Hi Bob,
I have a 1990 Ford F150 V8. I don't drive it a great deal because it is used for DIY projects. Lately, I have been having an issue with it. I used to be able to go out, start it up and just go. Now, I find that I have to pump the gas a few times to get it to even start. Once I get it started, it will run for a few minutes and then stall. I then restart it again and will give it constant gas for a few minutes. It will seem to stay started until I either attempt to put it into gear or after I begin driving. It will then stall again. I go through this until the engine seems to warm up and then I don't seem to have a problem anymore.

In an attempt to fix the problem, I added fuel cleaner to the gas tanks (there are two) and put on a new fuel filter and air filter. None of these seemed to do the trick. Since I have two tanks and it does the same thing regardless of which tank I use and the fuel pump according to Autozone is in the fuel tank, am I right in assuming that it's not the fuel pump. Could it be the oxygen sensor? Or could I be off base and it's the alternator or something completely different. Any ideas?
Patrick

Patrick,
I would look at your idle air control valve. That is what controls your idle setting. It could also be your coolant temperature sensor. It's possible that the truck doesn't know that it's cold and needs to set a higher idle or simply the idle controller is not working correctly.
Good Luck!
Drive Safely!
Bob, The Auto Answer Man


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