Power loss 6.8 liter Triton

SOURCE: Power loss after running

loss of power can happen even if exhaust does not flow in other words you have a rstriction in the exhaust usualy the catalytic converter has collapsed any exhaust shop will be able to tell you right away, or when you loose power do you hear a hissing noise ? if so that is clearly a clogged converter replace the catalytic converter

SOURCE: ENVOY LOSES POWER AT HIGH SPEED

First thing I would do is replace the fuel filter. Could be clogging

SOURCE: i have codes po 638, 121, 221 does all these mean

I believe it's all related to youe brake light switch. There is a recall on it. It sticks and causes the epc kight to flash, also causing your other stated issues. If recall working has been done, buy the dealer switch. It's easy to replace.

SOURCE: 2001 focus. Replaced plugs, wires and coil pack.

Have you replaced the timing belt? if not i would highly recommend doing so. these cars need to have the timing belt replaced before it breaks otherwise it can and will cause major engine damage.

Ronny Bennett Sr.

• 6988 Answers
• Posted on Dec 01, 2009

SOURCE: 2001 hyundai xg300 3.0 liter no throttle response,

Check the fuel filter to see if it is restricted,and if it is not have the fuel pump pressure checked,this is the most likely cause of your problem.