Hey guys new here, with big problems on my ranger. I hope someone can help me

Rough idle, flashing engine light, no power at low rpmCodes 0316 0174 0172 Misfire cylinder 4, sometimes 6 other 2 or just P0300.

Engine has

New fuel pump
New injectors
New spark plugsNew spark plugs wire
New ignition coil
New CKPNew timing
127.000 miles
New thermostat
New radiatorEngine compression between 120 to 150

I'm even thinking about replacing the cylinder heads, but I'm losing love to the truck, I hope someone can help me thanks guys

 

So your fuel bounces between too lean and too rich? It might be an ecu problem

 

There was a TSB for 2004 to 2006 Rangers with 3.0l engines
There was a bad batch of exhaust valve seats used in the 3.0l Vulcan engine assembly plant, they were too small and would recess into the head causing intermittent compression loss
Codes p0316 and p0300

The Lean and Rich codes can both be caused by this problem, misfires cause lean codes and then when cylinder starts to work again Rich codes when computer tries to balance air/fuel mix again

Your compression test with 120-150 would lean towards valve issues, would need exact numbers from each cylinder and do dry and then WET test on each cylinder to confirm valve issue

TSB seen here: https://www.therangerstation.com/for...n-tsb-05-26-3/

And no not covered under any warranty at this point