BattleRat
Active Member
2WD Expy 4.6-Trans Issue?
Hey guys!
I am pretty new to these forums so sorry if I posted this in the wrong section.
I have a 99 Expedition XLT 2WD 4.6 V8 Triton with about 192,000 miles.
At about 154,700 I had the engine replaced with a refurbished one due to issues with the timing chain. After that everything was working great. A little while after I started having rough idle issues, so I replaced all the EGR system components and cleaned the intake manifold. Then again after that, everything was running smooth.
Now, just recently I started having issues with sluggish acceleration while getting on the highway. While I am on side streets everything is fine, gears switch, and everything is great. Once I get on the highway and push the pedal down, it is really slow to accelerate. The same thing happens when I try passing someone on the highway... it is just a pain trying to do that. There is also NO CHECK ENGINE LIGHT.
I am having trouble figuring out what it might be. I had the exhaust system checked for holes and that is all good. The O2 sensors are also working fine. The oil is changed regularly as it should be. Air filter is also new. I even replaced the fuel filter, and cleaned the fuel injectors.
My mechanic (the one that replaced the engine for me) told me that it could possibly be an issue with the transmission. That made sense to me because we replaced the engine but left the old transmission which is basically an accident waiting to happen.
Any ideas on what it could be, or is there anyone out there that is having the same issues?
Thanks for your time, and sorry for the long post! If there is any additional info you need, feel free to ask.
Hey guys!
I am pretty new to these forums so sorry if I posted this in the wrong section.
I have a 99 Expedition XLT 2WD 4.6 V8 Triton with about 192,000 miles.
At about 154,700 I had the engine replaced with a refurbished one due to issues with the timing chain. After that everything was working great. A little while after I started having rough idle issues, so I replaced all the EGR system components and cleaned the intake manifold. Then again after that, everything was running smooth.
Now, just recently I started having issues with sluggish acceleration while getting on the highway. While I am on side streets everything is fine, gears switch, and everything is great. Once I get on the highway and push the pedal down, it is really slow to accelerate. The same thing happens when I try passing someone on the highway... it is just a pain trying to do that. There is also NO CHECK ENGINE LIGHT.
I am having trouble figuring out what it might be. I had the exhaust system checked for holes and that is all good. The O2 sensors are also working fine. The oil is changed regularly as it should be. Air filter is also new. I even replaced the fuel filter, and cleaned the fuel injectors.
My mechanic (the one that replaced the engine for me) told me that it could possibly be an issue with the transmission. That made sense to me because we replaced the engine but left the old transmission which is basically an accident waiting to happen.
Any ideas on what it could be, or is there anyone out there that is having the same issues?
Thanks for your time, and sorry for the long post! If there is any additional info you need, feel free to ask.
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