service engine soon light flashing then goes away
#1
service engine soon light flashing then goes away
hi i am recently having problems with my 03 f-150 5.4 engine seems to be running rough and is like it is starving for gas,or water in fuel,or fuel filter plugged or is running on 6 or 7 cylinders.those were my first few guess untill service engine soon light came on.so i disconnected the battery to clear computer to see if it came back and it did it flashes then goes away.on the other hand i have a head gasket that is gone no water in oil has been leaking oil for awhile but never givin me anymore trouble other than the leaking oil.so now my question is are these 2 problems related or is there something else wrong?any thoughts would be appreciated.
#2
Registered User
iTrader: (2)
a flashing CEL usually indicates a misfire. if it thows another CEL have the codes pulled and narrow down to what cylinder is misfiring. if you say you have a bad head gasket that would be the first thing i would suspect. have you done a compression test to see if its leaking?
#3
a flashing CEL usually indicates a misfire. if it thows another CEL have the codes pulled and narrow down to what cylinder is misfiring. if you say you have a bad head gasket that would be the first thing i would suspect. have you done a compression test to see if its leaking?
#4
Senior Member
Probably not the same problem as yours, but:
My mother-in-law's 2002 Crown Victoria had similar symptoms with rough idle (stalled a couple of times) and pi$$ poor acceleration - 60,000 miles. Code reader said misfire at one of the plugs, which we removed and found it fouled but also saw a tiny white spot on the side of the spark plug boot. That indicated a pinhole in the boot which allowed the spark to short out to the cylinder head in the plug well. Rplaced all plugs and boots and the problem was solved.
If you replace the plugs, don't forget to gap each and use anti-seize on the threads.
My mother-in-law's 2002 Crown Victoria had similar symptoms with rough idle (stalled a couple of times) and pi$$ poor acceleration - 60,000 miles. Code reader said misfire at one of the plugs, which we removed and found it fouled but also saw a tiny white spot on the side of the spark plug boot. That indicated a pinhole in the boot which allowed the spark to short out to the cylinder head in the plug well. Rplaced all plugs and boots and the problem was solved.
If you replace the plugs, don't forget to gap each and use anti-seize on the threads.
#5
Registered User
iTrader: (2)
Probably not the same problem as yours, but:
My mother-in-law's 2002 Crown Victoria had similar symptoms with rough idle (stalled a couple of times) and pi$$ poor acceleration - 60,000 miles. Code reader said misfire at one of the plugs, which we removed and found it fouled but also saw a tiny white spot on the side of the spark plug boot. That indicated a pinhole in the boot which allowed the spark to short out to the cylinder head in the plug well. Rplaced all plugs and boots and the problem was solved.
If you replace the plugs, don't forget to gap each and use anti-seize on the threads.
My mother-in-law's 2002 Crown Victoria had similar symptoms with rough idle (stalled a couple of times) and pi$$ poor acceleration - 60,000 miles. Code reader said misfire at one of the plugs, which we removed and found it fouled but also saw a tiny white spot on the side of the spark plug boot. That indicated a pinhole in the boot which allowed the spark to short out to the cylinder head in the plug well. Rplaced all plugs and boots and the problem was solved.
If you replace the plugs, don't forget to gap each and use anti-seize on the threads.
#6
yes i do know its time for a tune up but i am scared to do it myself not because i am not mechanicaly inclined its that i have heard horror stories about changing the plugs as they like to break,and i did take it to the ford dealer to see how much it would cost to do the head gasket and they told me it calls for 19 hours of shop time at over 100 dollars an hour here in canada i cant really afford it,that would be the time to do the plugs is when i get the head gasket fixed i've just been trying to hold off as long as i can but now its giving me the other troubles
#7
Same Issue Resolved
hi i am recently having problems with my 03 f-150 5.4 engine seems to be running rough and is like it is starving for gas,or water in fuel,or fuel filter plugged or is running on 6 or 7 cylinders.those were my first few guess untill service engine soon light came on.so i disconnected the battery to clear computer to see if it came back and it did it flashes then goes away.on the other hand i have a head gasket that is gone no water in oil has been leaking oil for awhile but never givin me anymore trouble other than the leaking oil.so now my question is are these 2 problems related or is there something else wrong?any thoughts would be appreciated.