Acceleration issue - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #1 of 5 (permalink) Old 11-12-2012, 05:47 PM Thread Starter
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Acceleration issue

Hi everyone and thanks in advance for reading this. I Drive a 2003 Mach 1. I am having an issue with of acceleration sorts. When I accelerate my car kinda lags a bit. I don't know why it does it. I have been told it has something to do with my ignition coils or something similar I was wondering what the best way was to check them. and if anyone has any other ideas.
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post #2 of 5 (permalink) Old 11-12-2012, 10:35 PM
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Post Re: Acceleration issue

Easiest way out is with a scan tool. Not only will it show any trouble codes but the good ones will display engine data.


The above posted information is in my opinion only. It may contain copy and paste material(s). Your opinion(s) and mileage may vary.
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post #3 of 5 (permalink) Old 11-16-2012, 09:51 AM
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Re: Acceleration issue

This fits better in the 96-04 section vs. the 2011 section...

Anyway,have you noticed any other symptoms (mis-fire, bad vibrations, odd idle, etc.)? As Kultulz says, a scan tool helps narrow things down quite a bit. My best guess though would be plugs (mine died well before 100k so if you got some miles on yours, this is a good start), bad O2 sensor (if you replace it, get Motorcraft only as Ford plays some games with them), or a dirty MAF (especially if you have a K&N filter). Less likely but also possible are a bad FPR, coil(s), sticky EGR valve or a bad DPFE sensor. A vacuum look could also be very possible. As you can see, a scan tool can help narrow things down a bit.
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post #4 of 5 (permalink) Old 11-18-2012, 04:59 PM
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Re: Acceleration issue

Check fuel pressure.
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post #5 of 5 (permalink) Old 11-18-2012, 05:02 PM
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Re: Acceleration issue

Change the fuel filter, cheap n easy to eliminate...

Cheap, Fast, Reliable... Pick 2...
'70 Mach1 351C 4v 4sp 4:56's Been abused sense '79, needing tlc
'61 Fairlane 500 292 2v Cruise-o-Matic also needing tlc
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