Code P0452

Just started when i was on the high way..The check engine light was flashing also had codes P0301, P0327..I have smelled fuel Once or twice in the last few days .. I have replaced the fuel pressure regulator ..could it have gone bad? I put in a new fuel pump 4 weeks ago and filter..PCM 2.0 from ZZP..any suggestions what to check? thanks AF

Trouble with EVAP pressure sensor error!

P0452 = Fuel Tank Pressure Sensor Circuit Low Voltage
P0327 = Knock Sensor Circuit Low Voltage
P0301 = Cylinder number 1 Missfire

Lets worry about the most important code first. P0301. If you are smelling gas and have a flashing SES with P0301, you could burn your CAT up if you continue to drive.

I assume you have a GTP since you have some MOD's. What made you decide to go with a ZZP 2.0 PCM rather than just a 1.0? What other mods do you have? Smaller pulley?

You could try to reseat your PCM connector. Check for bent pins and corrosion.

sorry it is a 1.0 pcm but the SES will go away if i dont drive on the highway ..its only when i got to pass someone will the SES flash ..iv had poor boost it will max out then go back to a few bars then max out? i dont drive WOT very often just when i have too.

what octane fuel are you running? I understand with today's gas prices premium hurts, but running a modded GTP on 87 octane is a big NO-NO!

I run 91octane and i run a fuel cleaner every 4 tanks of fuel...

Do you have the other supporting mods for the PCM you have?

First figure out why its missfiring on number one. It only does this on accelleration? May want to check compression.

Found spark plug wire bad ..rebooted pcm and everything works great..thanks all

Found spark plug wire bad ..rebooted pcm and everything works great..thanks all

simplest solution is usually right.
I would have started at the plugs and wires, then coils, etc..