07 5.3 vortec misfire has me stumped

[DFBrews]

Figured it out broken valve spring #3 intake going to swap it out and see what happens. I did bore scope the hole and it doesn't appear to have hit the piston

[ray1970]

Figured it out broken valve spring #3 intake going to swap it out and see what happens. I did bore scope the hole and it doesn't appear to have hit the piston

Good catch. I used to replace a lot of broken valve springs on the 3.8 V-6 engines back in the early to mid 1990's. I haven't heard of the 5.3 breaking valve springs. Is this a fairly common problem or did you just happen to have one fail?

[MarkCO]

Good catch. I used to replace a lot of broken valve springs on the 3.8 V-6 engines back in the early to mid 1990's. I haven't heard of the 5.3 breaking valve springs. Is this a fairly common problem or did you just happen to have one fail?

On AFM engines, yes. Not on the others.

[Graves]

Figured it out broken valve spring #3 intake going to swap it out and see what happens. I did bore scope the hole and it doesn't appear to have hit the piston

Soooo, I can have my parking spot back meow?

[DFBrews]

Soooo, I can have my parking spot back meow?

No.

[DFBrews]

Ray I dont know I have not had a chance to do any research on it I found it after work. ( the tahoe is sitting in my working parking I have been working on it as I have had time.

My last 3 vehicles have been 2 Subies and now a tacoma with a 1991 GMC being the last amercian car i owned. so I am out of the loop on the american engine side.