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post #1 of 8 Old September 27th, 2013, 06:21 PM Thread Starter
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Cobra issues

Hey guys I bought myself an 03 cobra last year and it ran perfectly fine, I let it sit for the winter and out of nowhere I start having issues in low end and start up performance, any ideas or need of information to help me narrow it down thanks

---------- Post added at 06:21 PM ---------- Previous post was at 06:00 PM ----------

I've changed my spark plugs from motorcraft to Ngk iridium 9s after my tune if that may have caused the loss below 2k rpms and my battery randomly died to the point where it wouldn't hold a charge so I replaced it with an optima red top, if yo have any suggestions for me to look into I'll take it into account I've tried so much and now I'm stumped.
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post #2 of 8 Old September 27th, 2013, 06:36 PM
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Clogged injectors or bad gas is where i would start.

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post #3 of 8 Old September 28th, 2013, 12:47 AM
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Clogged injectors or bad gas is where i would start.
+ 1 I would suspect bad fuel first.
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post #4 of 8 Old September 28th, 2013, 05:16 AM
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What they said. And my mach seems to like Motorcraft iridiums better than the NGK IXs.
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post #5 of 8 Old September 28th, 2013, 01:16 PM Thread Starter
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Well I went through several tanks of gas and as for the injectors, after I get over 2500 rpms i get full power again could that still be the case?

Last edited by IRcar; September 29th, 2013 at 12:33 AM. Reason: Autocorrect fail
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post #6 of 8 Old September 28th, 2013, 05:51 PM
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you need to have your alternator tested. If the alternator is bad those sypmtoms you are experiencing could be caused by it. Especially since you say your battery died out of nowhere. Whether it be old or not still get the alternator checked.

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post #7 of 8 Old September 29th, 2013, 12:36 AM Thread Starter
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A failing alternator could cause a loss in power? I'll test that on my next day off along with the fuel injectors thanks guys
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post #8 of 8 Old September 29th, 2013, 04:43 PM Thread Starter
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I got the alternator tested and it's good didn't get to the fuel injectors yet but curious if anyone had any other ideas
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