Check Engine Light

[Jeff_Godfread]

I have a '94 Explorer Sport, and a problem. Every time I drive for more than an hour my check engine light comes on and it runs llike crap, severe power loss, rough Idle, etc. I have replaced the plugs, installed sport induction kit and cleaned the MAF. I also had the fuel filter replaced, and did an emission system cleaning. I have had it in the shop after the engine light went off and nothing comes up. I heard it might be my EGR valve, is that worth checking out? How do you check it?

 

[Triton46]

Sounds like the FPR (Fuel Pressure Regulator). I had the same symptoms in mine, changed it and the O2 and all is well now.

Do a search on FPR or Fuel Pressure Regulator and you'll find all you need to know.

 

[JT]

i had the same problem, i had severe horse power loss when accelerating on the highway, or the truck would hesitate when cruising, came to be the EGR.

 

[Dannyboy]

my light keeps coming on also
I paid $50 for my dumb*ss mechanic to tell me it was a hose by the egr or something. I had no power loss. Now he said 4 codes came up cause it still lights up. I had to drive about an hour last weekend and realized one thing a standard piece of electric tape fits perfectly where that light comes on LOL. Should I believe this dude when he says one part may need to be replaced and then another may still make this thing light up?

 

[JT]

My mechanic lets me scan my truck for nada i found after the EGR was malfunctioning, an oxygen sensor followed. If your light keeps going on and off, it may be a o2 sensor. O2 sensors are only engaged when the engine reaches a certain temperature. I have yet to get my 02 sensor changed, its prolly gonna be done this week, Since last scanning it about a week ago, the light came on, and just went off this morning...go figure.

 

[914x4sport]

I was having a problem with mine similar to that...hesitation, check engine came on after about an hour or so on the road...Replaced the O2...nothin...Bought a code reader...Showed up #11...The one that means theres nothing wrong...Bought new plug WIRES...voila! No more light,truck runs like new.