My 2001 stratus misses and engine light flashes 4 or 5 times when going up a hill. it also hesitates when you give it alot of gas. misses even while idling. i'm thinking fuel filter or sensor of some kind. please help
Umm yea you are having a miss fire in one of the cylinders and that is when the engine light flashes i would not drive the car you could damage the catalytic converter and that is not a good thing the repair is alot
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Most likely you have a bad COP (Coil On Plug) .
Maybe more than one. Very common ford problem for last 12 years.
If you get a MIL Light on the dash (the wrench),check for a PO300 Code.
A PO304 would be coil #4,PO306 #6 Etc.
Cyl 1 thru 4 on pass side
Cyl 5 thru 8 on driver side,front to back
Also hills cause a hi engine vacuum and thus a possible EGR Valve going bad. You can unplug the vacuum lines and plug, to diagnose that issue.
Also leave the EGR disconnected if your working on coil issues. Just note the MIL light will stay on all the time,and remember to check your 300 codes if you feel a hesitaton or miss.
Heater core is a possibility, and monitoring your coolant level closely should tell you if it is leaking as level will go down. As far as hesitation goes, if check engine light comes on, a trip to autozone or Pep boys for a free trouble code scan, should point everyone in right direction rather than replacing parts by guessing. (much cheaper that way too)
When the check engine light is flashing that indicates an engine misfire, which is catalyst damaging. Because you said that it generally only happens up a long hill or at higher speed, and it doesnt happen all of the time, most likely you are in need of a full tune up.