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Old 12-20-2011, 07:57 PM   #1
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Urgent help needed plz.

I'm driving from work and I start taking off from a light and the car starts going crazy and missfire as im releasing the clutch. The car won't move with out mad missfire. It does idle at
15 but when you slightly step on the gas it pegs at 17-18. I have a wideband.

Like Wtf.

Yesterday i replaced my front oxygen sensor to a motorcraft one car and she ran like a champ.

What could possibly be causing this bs? I'm sitting off the side of the road waiting for a tow truck.

It's a 2002 focus svt jrsc no bbk. 67k miles.

Also my clutch master cylinder is leaking at the clutch pedal. Not sure if it will have anything to do with what is happening.


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Old 12-20-2011, 08:32 PM   #2
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Fouled plugs, dirty MAF, etc. Presumably you have an Xcal, scan and see what it says.
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Old 12-20-2011, 10:10 PM   #3
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Check the pigtail on the coil pack. When the clutch starts engaging it puts a load on the motor(slightly rocks if u have factory mounts) causing the fray or short to act up. Does it sound like a dirt bike? Ford has a pigtail repair kit around $15
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Old 12-20-2011, 10:41 PM   #4
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If it goes lean, it almost sounds like you have a fueling problem. Did you hit any really bad potholes? Does it idle rough? I hit a brick one time and it activated my fuel cutoff switch. Car bucked and stuttered. Just had to hit the button in the passenger foot well.

Otherwise, do you have Kenne Bell BAP? Maybe your fuel pump is dying or there is a wiring problem. So many things to check with a problem like this, sorry.
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Old 12-20-2011, 10:50 PM   #5
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Agree , use your scan tool , if you need help with what the log shows contact me I will help

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Old 12-21-2011, 12:05 AM   #6
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I will check on my fuel system.
Fuel filter(motorcraft) was changed almost 3 days ago.

Could a failed MAF cause this?

Its so weird because the car idles normal...14.8 - 15.2 AFR. Then some gas and it rockets to 18.
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Old 12-21-2011, 12:06 AM   #7
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Quote:
Originally Posted by bmylez View Post
If it goes lean, it almost sounds like you have a fueling problem. Did you hit any really bad potholes? Does it idle rough? I hit a brick one time and it activated my fuel cutoff switch. Car bucked and stuttered. Just had to hit the button in the passenger foot well.

Otherwise, do you have Kenne Bell BAP? Maybe your fuel pump is dying or there is a wiring problem. So many things to check with a problem like this, sorry.

I do not have a BAP. All stock system
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Old 12-22-2011, 08:54 PM   #8
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I have 4 codes.

P0113, p0102, p0136, p0141.

I know 136 and 141 are my rear o2 sensor...I don't have one.

113 and 102 are both for the maf. Does this mean its all bad. Just replace it?
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Old 12-22-2011, 09:06 PM   #9
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i would check the connector going to the maf sensor because the 113 and 102 are both on the same connector on the intake tube. By chance did you just clean your k+n air filter and oil the hell out of it because i have seen that more than once if so go pickup some mass air flow cleaner and spray the hell out of it.
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Old 12-22-2011, 09:32 PM   #10
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I just cleaned the sensor 3 days ago. That's what makes me thinks its bad.
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