3.8 Runs very rich

[greasmoky2]

I have check coolant temp sender and air temp sender they are with 4 degrees of eachother. I have four codes p0172 ( rich code ) p0175 (rich code ) p0300 random misfire, and a p0135 but with scanner hooked up it is running with in paramiters, I checked for leaking injectors. none found. the thing is burning a ton of fuel and runs real rough.

[greasmoky2]

Found the problem, it was a bad fuel presure regulater. it was filling up the intake with fuel, installed a new part and runs like a champ again

[wrightz28]

Nice catch.