My mom has a 93 Ford Aerostar Van 3.0L. Recently started having starting problems. The Van runs fine and starts fine if it's been sitting for more than 20 minutes or so. If she stops to get gas, when she comes back out to start it...it won't start. I thought it was a problem where it wouldn't start when it was hot, but the other day we started it up....backed it off the trailer and parked it in the garage....5 min later it wouldn't start? She had it towed before all this to a Ford dealer and they gave her an estimate of $1000 ... They stated that the ECT, MAF, O2 sensors were all bad. And the spark plugs and wires were possibly bad. I looked all of this up and The parts are a lot cheaper elsewhere. Plus, I do have semi-descent knowledge to auto mechanics which will save her 600 dollars in labor charges. I know where everything is and how to replace all of these parts, but unsure to go ahead and change all of this. Does anyone have an idea? I was wondering if there is a fuel shutoff switch that's linked to the ignition. I thought maybe if that was bad it wasn't shutting off and it's more or less flooding it? Please, if anyone has advice....please help! Thanks.

Kevin

I forgot to be more specific about the starting itself. The van cranks over just fine. Battery and alternator are in good condition. To me it seems like a fuel problem, but I could be totally wrong. I hope you can help me.