2013 PP SHO | Need help narrowing issue with leak

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Nyj2013SHO

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(No idea if I can post videos of problems) Car was fine driving to work then after work car jolted and engine light came on. Same sensation when the 4th cylinder misfired.


Code - P0457 - System leak (fuel cap)


Bought car used at 75k miles, after 1 week ,misfire, Solution: a new coil and spark plug


After 5 months, gas leak (burning through gas, every couple seconds the fuel bar went down - a 15 mile trip ate 60+ fuel idle at red light took 5 miles off, putting in sports mode somehow fixed it???)


Solution: Shop bought a new assembly and replaced filler neck. (3rd Cat was burnt to a crisp, lots of burnt/ overheating below car, cut it off never put a cat back on.)


3 months later, gas leak. Code Linked to canister purge valve and solenoid valve, but light went away. Took back to same shop to test for leaks and told them what codes showed and parts. They told me no leaks, brushed off my concern for the canister purge valve, replaced solenoid valve.


3 weeks later, gas leak AGAIN, car had rough idle since purchased, now it's very heavy, vibrates like crazy, car/ steering wheel shaking when accelerating at low/high rpms and low to high speeds of 55*


Power loss when foot is on pedal steadily but picks back up, jumping needle 0-2k, car won't remote start. Exhaust very butchered when idle, feels like the car can turn off at any moment when at a red light.91820654 247D 4CF2 8663 E9C383012EDE


23 (M) not sure how to go about this, tune up for rough idle..? Car is old, don't think coils/sparks/ptu/trans fluids have been touched.


I know I shouldn't be driving it but I take it easy on it and go from work to home at cruise speeds 55. Going be looked at Friday then possible wait another week to be fixed.
 
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Texas Marauder

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Try disconnecting the purge valve fitting at the intake and capping the intake fitting. See if the engine runs better. Should be lower purple fitting on the right side of picture.

1737052646007
 

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