98 ranger sport - shortcab, 5 speed manual okay, got this issue goin on - most of the time she’s fine. Or at least she was for a while. Then she started getting wacker noticed it first driving up a hill on a highway. Had to pull over about it. It’s like “lurch?” Losing acceleration, jolting back and forth - hear a very low rumbling noise in my engine bay. I don’t want to mislead, but the best way I know how to describe it is that it feels like my engine gets about two feet lower to the ground and works 40% as well hit up my mechanic. He thinks it’s my clutch. I think he’s full of shit, and a “throw spaghetti at the wall and see what sticks” type of mechanic. went to an autozone. Met a hillbilly truck whisperer. He unplugged my IAC while she was running. Let it go for a second and plugged it back in. No problems for at least a week, she ran like a champ problems eventually arise. I start resetting IAC myself. It works for a while. Eventually stops working all together. Now I don’t drive Rangelica on the highway at all. Important note: she has not thrown code this entire time. My best guess is to replace IAC? Someone I work with was saying fuel injector cleaner would be a good place to start. but literally any advice is welcome and then some. Thank you in advance
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humm, bad compressor starting to freeze up =fan belt noise,intermittent fuel pump possible but experience here is that the stops cold, have you considered a kink in fuel line?, undo the bed bolts and taillights ,find 3 other people and a case of beer for them ,place a large piece of cardboard between cab and bed, then lift the bed off and change pump, filter and closely look it over, also good time to change rear dif. fluid
It seems like I’m having the same issue? What did this end up being. I don’t want to throw a new pump in if I don’t need to.
IAC => idler air control, this vale control the amount of air entering the intake and tell the computer how much fuel needed. Normally, you would have "high idle or low idle" if IAC is faulty. But it is sound like she is not getting enough fuel to the injectors. The reason I suggested fuel filter is the cheapest and should be replace anyway and you can test the fuel pressure while having the filter off. If no fuel shooting off the fuel line, then new fuel pump.
