subguy

89 F150, starts fine then goes into rough idle with fuel smell and some black smoke at tail pipe. Run up RPM's still rough and if you let off gas pedal engine stalls. Is it a regulator problem? Any sugestions?

Thanks

Just call me Sean

iTrader: (1)

First check the computer for codes, this thread will tell you how:
https://www.f150forum.com/f10/how-retrieve-trouble-codes-obdi-10907/

SCOOB

need to check the fuel pressure regulator pull vac. hose cycle key and see if any fuel comes out vac port on reg. Also need to ck. fuel press. and any pinched fuel lines.

kalealmighty

it could be the throttle positioning sensor, mine did the same thing and spit white smoke out the exhaust but it ended up being an injector stuck ans the TPS