9165pt0

hey guys i was told by the smog shop that my timing was only at 7 degrees on my stock 5.0. it runs strong and doesnt ke it lags or anything. so i set it to 10 and it feels way better, but if you get on the throttle at freeway speeds it pings. i thought 10 degrees was the stock base timing?

AdderMk2

check to make sure your balancer hasnt spun

9165pt0

how would i test it?

mjr46

roll motor up to tdc and check where mark on balancer is, and if balancer is not spun then it may be carbon build up in the chambers/on top of the pistons and a good seafoam treatment will cure the issue

PRO50SC

EGR system working?

lehrskee

my 5.0 pinged real bad too under heavy throttle. switched to 93 octance and been fine ever since. what octane are you running?

9165pt0

i got a code for my egr valve isnt working properly. also my spark plugs are chalk white. if i seafoam it should i change the plugs? they have about 7000 miles on them

mjr46

if seafoam fouls the plkugs out during the treatment then yes but if not don't worry

9165pt0

ok ill seafoam it and give an update

PRO50SC

That's where I would start