!!Flashing check engine light!!!!!????? - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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  #1  
Old 05-01-2007
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Icon4 !!Flashing check engine light!!!!!?????

Ok well I went wheeling sunday. As you can see in the pics and vid section. My truck was running perfectly fine. I drove it about 5 more miles that evening. Than yesterday I drove my truck to work (22miles highway) ran smooth. Drove my truck back home. Ran smooth. Than after I got home about 3 hours later I went to take my tuck out. It started up fine, Ideled perfectly fine. Than when I went to pull off, when I hit the gas my truck was very hesitant. Started to like sputter/jerk/kick feeling. Then my check engine light started to Blink. I have never scene it blink?????????????

So I parked the truck, with it in idel. It runs perfect in park. Check everything I possibly could under the hood at that time. Did'nt see anything. So I turned the truck off and started it back up again. Started up like a charm, now the check engine light just stayed on..........so I ran it for 20miles. Doing so it would make a sputter sound when I hit the gas real quick, and it would start to jerk,kick, like movement. The rpms would kinda drop when it started to do so. So My question is, whats your opinion? Hers what I checked yesterday:

-All fluids
-fuel filter
-air filter (cleaned)
-mas (cleaned)
- Took out my spark plugs (They are autolites) The heads on them (to me) looked fine. Looked like normal wear, but around the threads there was some thick black build up. Yes I do burn oil. About 2 qrts evrey 3,000miles.

So Im going out, buying motorcrafts plugs and seeing if that will solv the problem? I'm thinking I have a fouled plug maybe. (I alread have motorcraft wires prob about 15-20,000 miles one them the most)
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Old 05-01-2007
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The flashing CEL means that the PCM is currently detecting misfire. The solid CEL means that a code is stored, possibly for the same problem.
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Old 05-01-2007
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Quote:
Originally Posted by rwenzing
The flashing CEL means that the PCM is currently detecting misfire. The solid CEL means that a code is stored, possibly for the same problem.
This also could be a bad egr valve I assume also.............
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Old 05-01-2007
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I have heard they can be a pain to replace? the EGR valve?

Last edited by fletch12518; 05-01-2007 at 07:27 AM.
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Old 05-01-2007
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daum, i'll figure it out on me own.
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Old 05-01-2007
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is there an AutoZone near you? if so, take it to them and have them pull the code.........
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Old 05-01-2007
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Im going to if the light comes on after the spark plugs are in. It's more than likely the EGR valve. I might as well replace it anyway. I have almost 170,000miles on the Truck
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Old 05-01-2007
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its a ***** to replace from what i have heard....
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Old 05-01-2007
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Quote:
Originally Posted by lifted97ranger
its a ***** to replace from what i have heard....
Me to, but if I can save a hundred to 200 bucks out of labor I will try myself. I just don't know what is soo hard about it? I can't find no info on how to's or nothing. Mybe my Hynes Manual will have it. idk, would be extremly nice.
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Old 05-01-2007
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The EGR valve sounds like a wild guess. That's not a very good way to troubleshoot.

Get the codes pulled!
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Old 05-01-2007
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From what you describe it sounds like a ignition problem to me.

Pull that CEL code..

Rich
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Old 05-01-2007
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Quote:
Originally Posted by wydopnthrtl
From what you describe it sounds like a ignition problem to me.

Pull that CEL code..

Rich
i agree, get the codes and let us know.
its hard to say whats wrong with it.
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Old 05-02-2007
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ok, well I pulled the old plugs yesterday. I put the new plugs in. (Autolite Platinum) My truck runs super smooth now, even at low RPM going up a hill hitting the throttle. Noy I did at couriosity mesaure the gap of my old plugs. 2 out of the six plugs were gapped correctly!???? I must have been retarted and not measure em the right way or something. But the check engine light is still on. I reset the computer in my truck 2 times. (turning it on and off 3 time quickly). So I am going to get the code pulled today.......all i know is the problem is gone.
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Old 05-02-2007
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well you said it was after you where off roading, pull your air filter and clean the MAF.
its possible you sucked up some water and it got dirty, who knows, i would have to see some codes.
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Old 05-02-2007
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to really reset the code, you need to disconnect the negative side of the battery and let it set for about 10 minutes........
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Old 05-02-2007
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Quote:
Originally Posted by lifted97ranger
to really reset the code, you need to disconnect the negative side of the battery and let it set for about 10 minutes........
or get a nifty scanner like i have and hold the reset button for about 3 seconds.
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Old 05-02-2007
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Quote:
Originally Posted by 5speedin2.3
well you said it was after you where off roading, pull your air filter and clean the MAF.
its possible you sucked up some water and it got dirty, who knows, i would have to see some codes.
Yeah I did all that........If the light doest go out after i take the ground off, i'll get some codes for you.
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  #18  
Old 05-02-2007
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Quote:
Originally Posted by lifted97ranger
to really reset the code, you need to disconnect the negative side of the battery and let it set for about 10 minutes........
I'll try it my first break at work. Thanks. So what does turning the key on and off three time reset than. Im just courious?
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Old 05-02-2007
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never heard of that method...
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Old 05-02-2007
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Quote:
Originally Posted by fletch12518
I'll try it my first break at work. Thanks. So what does turning the key on and off three time reset than. Im just courious?
Nothing.

Quote:
Originally Posted by fletch12518
Yeah I did all that........If the light doest go out after i take the ground off, i'll get some codes for you.
If you reset the PCM by removing the battery cable, the codes will be erased. You'd have to wait until the CEL comes on again to pull them.
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Old 05-02-2007
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You don't have to wait ten minutes... **if** you turn on the headlights while the battery cable is off.

Rich
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  #22  
Old 05-02-2007
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So should I take the ground cable off or what?
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Old 05-02-2007
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Quote:
Originally Posted by fletch12518
So should I take the ground cable off or what?
Yes, if your goal is to reset the PCM, clear the fault codes and turn off the CEL. If the problem is still there after the reset, the CEL and codes will return sooner or later.
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  #24  
Old 05-02-2007
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Quote:
Originally Posted by wydopnthrtl
You don't have to wait ten minutes... **if** you turn on the headlights while the battery cable is off.

Rich
you have got to be kidding......that is the (no offense) dumbest thing i have heard
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Old 05-02-2007
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Quote:
Originally Posted by lifted97ranger
you have got to be kidding......that is the (no offense) dumbest thing i have heard
LOL.. Maurice.. Maurice.. Maurice.. you really ought to embrace science. Life is so much easier.

If you feel it's so dumb.. try it and prove me wrong.

Rich
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