5.4 unresponsive
Laughing Gas
Joined: Aug 2005
Posts: 1,156
Likes: 10
From: Drain Oregon and Sacramen
Originally Posted by schocker
I have a 1999 Superduty with a 5.4 that will not rev up when I press the gas pedal down, the engine idles a little rough then dies. Anybody have any ideas on where to begin?
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
Yes, I went through the same thing. It took me 9 months to find out it was the converter. The truck I was driving at the time gave no error codes, some days would run decent, other days wouldn't have enough power to get out of it's own way. I cleaned and replaced the MAF, changed the plugs and coils, replaced fuel filters, cleaned the injectors, replaced the EGR valve and controller, just did everything I could think of, when a technician at the dealeship (who was as puzzled as I was) disconnected the Y pipe on a hunch and took the truck for a spin. He was so tickled he had found the problem he actually called me up and told me he just pulled away from a stop sign in my truck and had smoked both tires! 
Plus, it cost nothing to disconnect the Y pipe and test it.
That fits my budget very well.
Plus, it cost nothing to disconnect the Y pipe and test it.
That fits my budget very well.
Last edited by redford; Aug 8, 2007 at 04:42 PM.
Laughing Gas
Joined: Aug 2005
Posts: 1,156
Likes: 10
From: Drain Oregon and Sacramen
Originally Posted by redford
Yes, I went through the same thing. It took me 9 months to find out it was the converter. The truck I was driving at the time gave no error codes, some days would run decent, other days wouldn't have enough power to get out of it's own way. I cleaned and replaced the MAF, changed the plugs and coils, replaced fuel filters, cleaned the injectors, replaced the EGR valve and controller, just did everything I could think of, when a technician at the dealeship (who was as puzzled as I was) disconnected the Y pipe on a hunch and took the truck for a spin. He was so tickled he had found the problem he actually called me up and told me he just pulled away from a stop sign in my truck and had smoked both tires!
Plus, it cost nothing to disconnect the Y pipe and test it. That fits my budget very well.
Plus, it cost nothing to disconnect the Y pipe and test it.
That fits my budget very well.
