4 and 6 not firing

My 4th and 6th cylinder arent firing at all
I checked these
Coil packs and harnesse
Injectors
Spark plugs .
injectors using stethoscope
And compression all 145
I have no idea what else to check help

 

did you do any recent work involving the engine?

 

Nothing... you now have a more economical 4 cylinder

 

I'm going to check vtc next I guess

 

I have a cai plenum spacer too that's all engine wise it didnt do this until I went through a car was it didn't hydro lock I changed everything out that I listed above....

 

Gettin' good early mileage with this one...

DYPTDTC?

 

What?

 

Agreed, that answer's a bit hard to decipher. Perhaps someone can clarify for you, good luck on your project!

 

I would start by checking CL or another reputable source for an LS1 or LS9 and swap the engine. Not only would it fix the issue you are having, but you can safely run the car through that car wash again without fear of coming out with only 4 cylinders again. You'd be right back where you initially started before this occurred.

 

Guess y’all s not hip to da lingo, man.

I saw no mention of diagnostics so my new acronym introduced earlier this week...

DYPTDTC, pronounced “dipty ditzy”, shorthand for “Did You Pull The Diagnostic Trouble Codes?”