Computer control relay location

You are welcome.

Roy

Error codes cylinders 4,5 and 6 misfires. Replaced sparkplugs ignition coils and fuel injectors. Error codes disappeared and car ran perfect. 30 minutes later ssne cylinder misfires pop up. However, thing is when I clear codes with diagnostic tool, car runs smooth and perfect. Yet 30 minutes later check engine light comes back on and car misfires. Believe problem is with actual ECM instead of actual cylinder misfires. What could be causing this?

What were the codes that set?

Roy

P0304, P0305 and P0306.

What are the results of the compression test I requested?

Roy

Compression is good. All sparkplugs ignition coils and fuel injectors are new.

Okay, what was the compression? Please give me the numbers.

Roy

That's been a while. I honestly couldn't give you an exact number. But all were over 100 PSI. Very little differentials.

I would retest and get the exact numbers. It makes a difference. You should have 140-160 pounds. If you do not, that could be the issue.

https://www.2carpros.com/articles/symptoms-of-low-compression

Roy

Will do. Thank you. So you don't think it could be an ECM problem?

Not at this point.

Roy