Need Help
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Freshman User
Joined: Jan 2009
Posts: 25
Likes: 0
From: South Jersey
Need Help
Hi all, I am new to this forum and am looking for some advice with the truck I just bought. I have a 2004 F250 FX4 Superduty with the powerstroke turbo diesel with 70,000 miles on it. It has new 33" procomp tires with no lift.
First issue. I just replaced the front and rear shocks with the procomp MX6 adjustable shocks because the ride felt pretty crapy. There was a thud under my feet on the drivers side when I would hit any bump in the road and the former shocks (Rancho) had long since lost their spring.
After replacing the shocks the ride improved 150% but I am still experiencing that thud under my feet. I have ordered a new stabilizer but was wondering what else I should replace to get the ride back to new or better condition?
Second issue. I think it may be turbo lag but, sometimes (not often) the truck has almost NO acceleration, I can compare it to driving stick and almost stalling out of first gear, it just doesen't respond for a few seconds, then just kicks in. What is up with that?
The motor is pretty much stock with the only performance upgrade being a Banks exhaust from the turbo back.
Any suggestions would help. Thanks in advance...
First issue. I just replaced the front and rear shocks with the procomp MX6 adjustable shocks because the ride felt pretty crapy. There was a thud under my feet on the drivers side when I would hit any bump in the road and the former shocks (Rancho) had long since lost their spring.
After replacing the shocks the ride improved 150% but I am still experiencing that thud under my feet. I have ordered a new stabilizer but was wondering what else I should replace to get the ride back to new or better condition?
Second issue. I think it may be turbo lag but, sometimes (not often) the truck has almost NO acceleration, I can compare it to driving stick and almost stalling out of first gear, it just doesen't respond for a few seconds, then just kicks in. What is up with that?
The motor is pretty much stock with the only performance upgrade being a Banks exhaust from the turbo back.
Any suggestions would help. Thanks in advance...
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
You probably didn't need the whole sway bar, just the endlink bushings. The frame bushings would be nice to replace at the same time. Other than those, I would recommend climbing under it with a ratchet and tightening all bolts/nuts you can find.
I don't know about the lag issue, but it does sound like a boost lag to me. You might try holding the brake down and building a few rpms before take off. Build some exhaust flow so the turbo is spooled up and then let off the brake and you should take off like a scalded dog.
I don't know about the lag issue, but it does sound like a boost lag to me. You might try holding the brake down and building a few rpms before take off. Build some exhaust flow so the turbo is spooled up and then let off the brake and you should take off like a scalded dog.
Fleet Mechanic
Joined: Nov 2003
Posts: 1,372
Likes: 14
From: West Cornwall, CT
Second issue. I think it may be turbo lag but, sometimes (not often) the truck has almost NO acceleration, I can compare it to driving stick and almost stalling out of first gear, it just doesen't respond for a few seconds, then just kicks in. What is up with that?
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Diesel engines have a different throttle response than the gas engines that you are probably used to. Don't mash down on the throttle when driving your diesel, try a more gentle approach and roll into the throttle.
If you see intermittent throttle lag it is possible that the vanes in the turbo are sticking. This is probably worth a visit to the dealer.
Lou Braun
