Help runs worse! New cap, rotor, plugs and wires. - Mustang Evolution

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Old 08-31-2012, 03:36 PM   #1
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Help runs worse! New cap, rotor, plugs and wires.

so I just about did a full ignition tune up. New plugs wires, cap and rotor. And it runs like poo. lots of hesitation when I accelerate. I took my time on every plug and wire. any ideas what the deal is? I unplugged the battery. maybe the ECU isn't used to it, any ideas?
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Old 08-31-2012, 03:50 PM   #2
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If you left the battery off long enough to drain the battery, it could have reset the memory.if so An idle relearn will do the trick.

Are you sure you didn't mix up any wires?
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Old 08-31-2012, 04:01 PM   #3
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I didn't unplug the battery til after I was done.. . I did each plug in correct firing order and everything.. my buddy said something about Gapping the plugs..
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Old 08-31-2012, 04:03 PM   #4
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[QUOTE="sam13708"]I didn't unplug the battery til after I was done.. . I did each plug in correct firing order and everything.. my buddy said something about Gapping the plugs..[/QUOTE

yes i always check plug gaps prior to intall. they should be between .048-.054
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Old 08-31-2012, 04:13 PM   #5
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thanks man, I just got a Gapping tool. I learn something new everyday! thanks!
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Old 08-31-2012, 05:01 PM   #6
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Re: Help runs worse! New cap, rotor, plugs and wires.

[QUOTE=dreamstang;1291739]
Quote:
Originally Posted by sam13708
I didn't unplug the battery til after I was done.. . I did each plug in correct firing order and everything.. my buddy said something about Gapping the plugs..[/QUOTE

yes i always check plug gaps prior to intall. they should be between .048-.054
I bet that solves it!

If that does not then check your air fliter, then check your fuel filter. May be good a
time to have the fuel induction service. Where you squirt seafoam through.

Then if that doesn't work check the fuel pump.
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Old 08-31-2012, 11:32 PM   #7
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I just got a new cold air intake, replaced the fuel filter and fuel pump last year (pain the the neck) and also ran sea foam through everything.. and fuel injector cleaner... now the problem is my car still seems to not run at full performance.,
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Old 08-31-2012, 11:40 PM   #8
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Quote:
Originally Posted by sam13708
I just got a new cold air intake, replaced the fuel filter and fuel pump last year (pain the the neck) and also ran sea foam through everything.. and fuel injector cleaner... now the problem is my car still seems to not run at full performance.,
I have found that the age of the fuel pump is really irrelevant. Especially if its an autozone/ebay special.
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