1994 Ford Explorer bad idle and losing power

TAMERSALEM

MEMBER
1994 FORD EXPLORER
6 CYL
4WD
AUTOMATIC
111,000 MILES

I have my car doing somthing not right everytime I hit the high way and do the speed limit and its 60 mph the car drive for 5 min on this speed and then it lose power and start to slow down to 45 mph and I have to stop for a min while the engine is running and then I hit back the road and it goes back strong again for 5 min and then it start to do it again and lose power down to 45 mph I dont know what to do I checked if there is a vacuum leak somwhere but I dont see anything there check engine light cam one when the car pas the 40 to 45 mph I got codes and its says EGR valve and I checked that to and nothing wrong with it? Help plzzz

Saturday, April 18th, 2009 AT 2:59 AM

1 Reply

JGAROFALO

MECHANIC
489 POSTS

One good possibility is that the engine may be starving for fuel. Has the fuel filter been replaced within the last year or so? Check fuel pressure - WHILE the engine is losing power. There is also the possibility of a weak fuel pump. Another possibility is a blocked or partially blocked catalytic converter. You can check for this (if the fuel pressure is OK) by attaching a vacuum gauge and driving the car. A blocked converter will cause the vacuum to fade down to 12" or less.

EGR problems will not cause such a loss of power. Normal symptoms of EGR problems are stalling and generally rough running. Usually not a loss of power.

Was this

answer

helpful?

Yes

No

Sunday, April 19th, 2009 AT 9:25 AM