2.5L running SUPER rich

[benjy_26]

Hello all.

 

I recently removed my heater control valve on my 87 Comanche, and since doing so, my truck has a noticeable miss at cold idle and smells like it's running VERY rich. Once warmed up, the idle evens out. I pulled my plugs a few days ago and they are black and sooty. Any ideas on what to look for? I'm thinking that maybe my thermostat may be stuck open, or I may have a bad coolant temp sensor.

 

thanks in advance!

[cruiser54]

You plugged the line you removed from the HCV right?

[benjy_26]

Yes sir!

[cruiser54]

Check the tube/line to the MAP sensor. 

[benjy_26]

Will do, sir! Thanks for the tip. :)

[cruiser54]

Will do, sir! Thanks for the tip. :)

My pleasure as always.