rikkoboy

Hello all. I am new to this forum. My name is steven and I have a issue with my truck that is killing. It is a 2001 f150 with a 4.6. Has 111k miles on it. It acts like the cats are bad. When you start it when its cold and In park, it runs good, no miss and takes gas. When it warms up you cant even rev it up. It bogs engine all the way down. Under a load it bogs and starts minor back firing or popping. I have replaced the cats and 4 o2 sensos, plugs and the knock sensor. None have changed or helped me. Car has 0 codes. Any ideas or suggestions are very much appreciated. Thanks

Jbrew

Disconnect the green line from EGR saucer. Do it cold, before it warms up. Then run/drive the truck normally or until failing point...IF it fails. Follow exactly as posted then post results.

rikkoboy

at idle the green vacuum feel like there isn't any vacuum coming in. And when you rev it up, same. I will try the steps tomorrow and post results.

Jbrew

Yea, that's how it's suppose to be and why you must disconnect when cold....before it becomes active at cruising speeds. Yea, try it out, it will determine if the valve is sticking and not letting go until it cools. That's the determination we are going for here.

rikkoboy

JCR 56

Clean the MAF. I would change the fuel filter on general principal if it hasn't already been done, and then check fuel pressure. Check the air filter and make sure it's clean also. Can't run without air.

rikkoboy

rikkoboy

Jbrew

Another one for the ignore list lol.

rikkoboy

Do you think it is fuel pump
issue?