Hello Scotty i have an 03 chevy cavalier EcoTec 2.2. I followed your…

Tech420

Hello Scotty i have an 03 chevy cavalier EcoTec 2.2. I followed your video how to-do a compression test all cylinders came to 150 psi. I noticed. I needed to-do spark plugs after i put everything together started right up no problem. I didn't want to drive it intel i did a tune up on it. Sat for week when i went out to start it. It had a p0300 all cylinders misfiring. I changed plugs and coils. It fixed the misfires on cylinder 1 2 and 3 but still have a 4th cylinder misfire made sure everything is tight all connections are good. No matter what i did still had the misfire replaced the fuel injectors. No luck. What could it be?

Comments (2)
No. 1-1
Scotty Kilmer
Scotty Kilmer

Editor

well, either you messed up the job, or got bad parts, or the battery is weak and sat too long . Have the battery load tested first