what can i do to fix these problems, starting up,popping or backfire and making it move or roll in drive
spraying quick start in it to start , high rpms ,popping or backfiring when accelerate , putting it in drive it will roll slowly ,slowly, in 1 it will move like in drive. all other gears work fine. also fuel pump keeps running will not turn off when starting up. THANK YOU.
It may seem silly but check your air in take if if is electric control remove the connector run car if this works you will need a new air control unit
What engine is in your truck? Sounds like a bad vacuum leak but your description of your concern isn't very clear. Won't start? Starts but won't run? Runs poorly? Fuel pump runs when? Sorry but your description is difficult to follow.
So it is running rich. I'm not sure I follow the "roll slowly, slowly" part unless the rich fuel ratio is bogging the engine? But the high rpm would kind of negate the bog. It is kind of unclear but I'm going to guess something measuring air flow is enriching the A/F ratio and I don't know what sensors are inline from your filter to throttle body. So it could be MAF / VAF / a fuel switch sticking. Another guess would be an open injector? or your idle air control valve (or comparable sensor) is sticking open (high rpm). I could honestly be wrong as well, and there are plenty of scenarios to make issues with EFI sadly. @Barry, do you mean a throttle position sensor?
any updates to this?
Looking for a Used F-250 in your area?
CarGurus has 609 nationwide F-250 listings starting at $3,995.
Search Ford F-250 Questions
Ford F-250 Experts