JR32

Hello all. I have a 97 F150 4.6 liter with 174k miles on it. I've replaced the fuel filter, plugs, wires, coil packs, gas tank.My truck started stalling randomly while driving or at a stop. My rpms will drop and then shoot back up. With most the time stalling out. Sometimes it will start back up while most the time not for an hour or so. It will just crank but not start. I need help. I've tried what I know. Thanks in advance!

Jbrew

Check fuel pressure and regulator.

JR32

I heard things about the Mass air flow sensir, Inc and crank sensor. Are these possible? Thanks JBrew.

JR32

Iac*

Jbrew

Not by your description

If it were IAC, it would re-start right away giving it fuel.

If it were the Crank Sensor, it wouldn't re- start at all. I guess you could check the connector, but that isn't a common problem.

Fuel first on this one.

JR32

Ok. Thanks a lot, JBrew.

Jbrew

No problem, hope you find the cause.

white89gt

No check engine light?

JR32

I Do Have A Check Engine Light on. It's my O2 sensor (bank 2 sensor2) downstream. Every one says that's not my problem.

JR32

Thanks. Me too. A little over an hour of it being towed home it fired right up.