We have a 1986 F150, 300 6 cyl, motor is 2 years old. We have put a new exhaust system on it with new cat converter,and rebuilt the carb. The truck starts fine and has a smooth idle but has no drive power. We have checked and double checked everything And can't seem to locate the reason. We would appriciate any input.

Dave

 

In my experience this could be case by a ignition coil giving low voltage, Ignition module or even connectors related to Ignition system...

 

my questin for you would be is when u put new cats on it did you make sure reconect the return from the cat to the carb (egr), if this is not connected you loose power

 

As far as I know... NO.

 

Did you bother looking in the INLINE 6 forums ??

They discuss this issue TO DEATH over there!!

https://www.ford-trucks.com/forums/f...splay.php?f=52