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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 07-08-2014, 12:09 AM   #1
Js88lx
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Default cobra still sputters

Well guys im at it again. cobra still sputters between 2k and 3k rpms when warmed up usually after 30min of driving.

changed parts-
spark plugs (coppers)
taylor wires
dizzy
alternator (old one bad)
coil
cleaned t/b and MAF
timing at 14* All this done within last 3 weeks.

Could my gas pump be going out? watch vid. when the rpms jump up and down my foot is steady on gas pedal. Also mostly happens on 2nd and 3rd gear.


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Last edited by Js88lx; 07-08-2014 at 01:33 AM. Reason: edit
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Old 07-08-2014, 04:51 AM   #2
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video is private
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Old 07-08-2014, 10:47 AM   #3
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Sorry. Check it now.
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Old 07-08-2014, 10:57 AM   #4
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Have you pulled any codes? Im assuming you have since I know you have been an active member here for quite some time and know we would tell you that first lol .

Just out of curiosity , does this happen at the same throttle position ? Im wondering if you have a bad spot on your TPS causing this. What does it do when you stand on it? .
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Old 07-08-2014, 11:08 AM   #5
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Quote:
Originally Posted by dawson1112 View Post
Have you pulled any codes? Im assuming you have since I know you have been an active member here for quite some time and know we would tell you that first lol .

Just out of curiosity , does this happen at the same throttle position ? Im wondering if you have a bad spot on your TPS causing this. What does it do when you stand on it? .
Yes.. lol And yes. same throttle position. That needle jumping up and down is not caused by my right foot lol. If I just mash on it revs up normal and no sputter. Just when I cruise between 2k and 3k steady. My KOER has no codes but my KOEO had 3. One of which (disconnected Temp sensor) I caused by unplugging it to see if my fan was working (it was) but that did give me a cel until I plugged it back on and I had another that said something like spout connector not grounding? I have the codes at home. 3rd code was I think a 172. But as I drive I have no cel!
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Old 07-08-2014, 11:17 AM   #6
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That spout connector code could play a significant role in your trouble. I would get a timing light and check your timing with the spout plugged in , watch the mark as you increase throttle , if it starts jumping around all over the place you may have a short in the pcm or spout circuit someplace.
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Old 07-08-2014, 11:24 AM   #7
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Quote:
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That spout connector code could play a significant role in your trouble. I would get a timing light and check your timing with the spout plugged in , watch the mark as you increase throttle , if it starts jumping around all over the place you may have a short in the pcm or spout circuit someplace.
So those codes on the KOEO can still affect my car even tho I have no CEL or no codes doing KOER test? I will try test later on after I get home.
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Old 07-08-2014, 07:44 PM   #8
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I did the test and as i gave it gas the mark on balancer did not jump around. was pretty steady. Spout was also connected. This sucks! Could it be a bad spark plug? Remember i added the whole bottle of seafoam to half a tank incident. well i never checked for foul plugs. But weird thing is that car runs perfect until it gets warmed up.

so code was 212- ground short in spout connector
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Old 07-08-2014, 07:58 PM   #9
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Maybe a TFI module going out?
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Old 07-09-2014, 10:44 PM   #10
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opened up tfi.. looks good. Should my spark plug have oil at the middle like that? The top was dry but just thought it was weird.


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Old 07-09-2014, 10:44 PM
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