Rough idle on start up

[1998vulcan]

Hey, I'll introduce myself as I'm new here. My real name is Daniel, I have a 1998 Ranger 3.0 4x4 and I'm from Cape Breton Nova Scotia.

Anyway, I'm having a issue with my ranger. When I start the truck up (especially cold start) the idle goes real rough for a few minutes. For the first few minutes after starting the truck it will idle at about 1300 rpm and every 5-10 seconds or so it will drop right down to about 200 rpm and almost quit. Also it was blowing alot of black smoke.

So far I have tried new down stream o2 sensor, maf, plugs, wires, PCV valve, air filter, fuel filter, and resetting the computer. The plugs and wires seemed to help with smoke but the rough idle is still there.

So I was wondering if anyone else has experienced this issue on a 3.0 and what the fix was? I'm thinking it could be a fuel pump or possibly the upstream o2's. I'd like to have a second opinion before I spend more money on parts I may not need. Any help would be greatly appreciated. Thanks.

 

[1998vulcan]

Hi I got a video of the problem here is the link. For some reason the problem is still there but it seems to be less aggressive since last time I posted. I scanned the truck but the Scanner is saying "OBD2 Not ready" Any ideas? I am stumped at this point.