Hello,

I have a 1989 ford ranger 2.9l v6. I bought the truck off a neighbor a couple months ago. Since then I have done a load off work to it including the head gaskets (never doing that again). When I bought the truck it was burning coolant so I went ahead and replaced the head gaskets. I finally started it up a couple days ago and have been getting it ready to pass smog, but I have an issue. The truck it burning rich and idling horribly but idling. I’ve been looking around at the vacuum lines, no vacuum lines controling the way the engine runs are disconnected. When I did the head gaskets I took the liberty and cleaned the fuel injectors. All the wiring is hooked up and I’ve even clean the coolant temp sensors. Yet it is still running rich. I just did the distributor and rotor and timed it to 10 degrees as said a website. I’m thinking that might be the issue but I’m no expert. I’ve also done the exhaust and cleaned the 02 sensor, no luck. I’ve unplugged and blocked off vacuum lines to see if that would do the trick but no. Anyone have any ideas at all as to what it is, I’ll try anything, thanks josh.

 

There is a SPOUT Connector near distributor, it needs to be unplugged when timing the distributor, engine needs to be warmed up as well when setting timing

There is a vacuum hose on the FPR(fuel pressure regulator) on the engine
IF FPR leaks then fuel can be sucked in thru that hose

You can not "clean" O2 sensors, O2 sensors use a chemical reaction to detect Oxygen in the exhaust, after 100k miles or 12 years they simply run out of that chemical so have to be changed, this is the only sensor that specifically wears out

You should only have one in 1989, change it, it can cause rich running when older

 

Thank you, I will try to diagnose those issues, I’m leaning toward the hose on the fpr, my brake booster keeps craping out and I think it’s because gas gets in through the brake booster line from the line you are talking about.