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Discussion Starter · #1 ·
So my cousin got a 2003 gt the other day and it had misfires so we changed the spark plugs and boots and all that.. And it's miss firing still.. Anyone have any problems?
 

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Check the spark plug gap. Make sure plugs and cop are installed correctly. You could have a dirty fuel filter or bad fuel injector causing it to be lean.
 

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Could be a leaking pressure regulator those can cause multiple misgire codes as well
 

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Discussion Starter · #20 ·
Could be a leaking pressure regulator those can cause multiple misgire codes as well
We figured it out.. I think lol because it isn't missing anymore but I think when my cousin put his side back in he didn't make sure the boot was put on the plug then put the cap and spring in at the same time to make sure the springs were touching the plug also so we redid them and everything's going good now
 
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