I recently installed my f2 intake and now the check engine light comes on. As far as I an see there seems to be no problems, but... any ideas? is this normal? Any answers would be nice
engine light after intake install
shockwave19
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I recently installed my f2 intake and now the check engine light comes on. As far as I an see there seems to be no problems, but... any ideas? is this normal? Any answers would be nice
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ok I cleared the battery and it went away, but my guess is that it will come back so please give me any ideas. thanks
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yeah it was off the whole time. I don't think it came on at first but maybe after about 40 or so miles
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hmm i guess that could be it...but I would think that it would come on immediatly and not after about 40 miles.
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8,343 Posts
This will only be a problem if he removed the MAF restrictor. It should be left inside the intake, unless you have the ability to tune the engine.
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nope....still in there.
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Try cleaning the MAF and IAT sensors with some carb cleaner. If they got dirt or grease on them during the install, or the filter had too much oil on it, then they could be sending weird voltages to the ECU.
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Did you disconnect the battery when you hooked it up??? That could be one problem. Also make sure all the connections are tight.![Image]()
Do not forget that Ford recommends a very specific idle/drive cycle within an approximate time frame so that the ECU's adaptive software (?) may relearn idle trim, fuel trim and in the case of an automatic trans, the shift strategy...
It's in the Ford Focus Owner's Guide; find the page in question by looking in the index under the listing of "Battery".
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ok i will try that. I disconnected the battery again and then hooked it up. it went away and put about 10 miles on the car and its still gone so i will see what happens. thanks for all the help
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i installed f2 intake with the battery connected and no check engine light so far and has been in for 200 miles now
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2,288 Posts
After installing my F2 intake on my Mazda3s (2.3L), there was just a slight hint of a stumble. I then disconnected the battery for few minutes, and ever since, it's been smooth as silk, and no CEL. I also drive a crazy amount, too: about 750 miles a week. It's been on for about one week.
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Mine does have a quiet whistle, but it doesn't last long--just a short one that I don't think passengers would even notice not being familiar with the way the car sounds with the stock intake.
I've also noticed since resetting the ECU that my exhuast (which is a Draxas 2.5" with high flow cat) makes more popping and burbling sounds. I like it (my old supercharged Focus tuned by Lidio used to do it wickedly). It makes me think that the car's running just a bit richer after resetting the ECU.
I've also noticed since resetting the ECU that my exhuast (which is a Draxas 2.5" with high flow cat) makes more popping and burbling sounds. I like it (my old supercharged Focus tuned by Lidio used to do it wickedly). It makes me think that the car's running just a bit richer after resetting the ECU.
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Resetting the ECU will force it to plot out new maps or whatever you call it based actually in large part on your driving.
My wife can make my car run like crap because she drives it like our V6 truck and bogs the engine, but resetting the ECU fixes it and the CEL that she manages to produce (I have draxas header, no cats).
My wife can make my car run like crap because she drives it like our V6 truck and bogs the engine, but resetting the ECU fixes it and the CEL that she manages to produce (I have draxas header, no cats).
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I once put the spark plug wires back on my CRX in the wrong order and just thought something was wrong with the engine for like a month.
Ya... that was about as stupid as you could ever get.
Ya... that was about as stupid as you could ever get.
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