'90 model F-150 Will Only Idle

[franklin2]

You didn't say what year the Lariat is, but you can look here for a ECM. You may find some numbers you can search with if you can't find the correct unit.

www.car-part.com

 

[Rimjam]

UPDATE: Truck moved to second indie mechanic who did a complete compression check - one cyl had zero compression, two others very low. Warped valves. Low engine miles (46k) may have actually contributed to the problem due to less wear on components & so was stuck tighter than an engine with more miles.

 

[rusty ol ranger]

UPDATE: Truck moved to second indie mechanic who did a complete compression check - one cyl had zero compression, two others very low. Warped valves. Low engine miles (46k) may have actually contributed to the problem due to less wear on components & so was stuck tighter than an engine with more miles.

Ill bet it jumped time.

Thatll bend valves. I had a 351w do it.

If you replace the valves check the chain...otherwise itll do it again

 

[Rimjam]

Truck sits with fairly large bucks poured into it. Owner can't decide to pour more or sell at a loss.