Car maintenance question?

I have a 2004 jeep liberty that will not idle or start on it's own unless I rev the engine for 20 minutes. Pep boys charged me 89 for an engine inspection and I'll be damned if I let them charge me 589 for the full maintenance. They say I need to do a fuel system clean up, like my fuel injectors but I wonder if I can get by with just the fuel injector cleaning fluid. Also they say my idle speed control motor needs to be replaced which I'm sure I can do myself.

Thoughts?

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raysam363 · 31-35, F

If it won't idle or stay started, there's likely a fuel issue somewhere. If it didn't start at all, that would be electrical. Had an old 94 Explorer that needed revving at longer lights or it would stall, and it was something to do with the fuel injectors (can't remember specifics). I'd suggest having another professional look at it if you doubt them.

CuddleFeesh · 31-35, M

@raysam363 its mostly the cost and it's no guarantee itll fix the problem. I've repaired everything on my car by myself just to avoid costs