Misfiring, runs like crap in morning

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Cpurp31

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1999 5.7 ppv.
Changed cap and rotor plugs wires and at times it will run like total garbage missing a backfiring.
Other times at 55mph and up it will almost studder or hesitate for a second
Plz help
 
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Cpurp31

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AEE245E6-C871-4C4F-8303-779EC2FE571D.jpegI’d say so smh
 

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exp500

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Any P0300's or P1345?
Have you updated the engine grounds? You are running two posts now. Coukd be connected.
 

OR VietVet

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Vacuum leaks? Cat convertor problems? O2 sensor problems? Did all those codes come at the same time?
 

exp500

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Post #5- Not sure that issue fixed yet. Could be connected.
 
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Cpurp31

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I think it could be connected. Idk if the ppv’s came with a push button start but this one has one. I’ve ran new wires since then. I’m going to check body grounds tonight
 
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Cpurp31

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Vacuum leaks? Cat convertor problems? O2 sensor problems? Did all those codes come at the same time?
Yea all codes came at same time. Could be a vacuum leak. I’m just hoping it doesn’t have anything to do with injectors
 

exp500

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Add a can or two of berryman. See if it cleans up the injectors. You already have the updated spider.
 

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