4.3 Pings FIXED

[V895]

My 4.3 zcode in my truck pings when the temp outside is above 75 degrees. Anything under this it runs great.

Timing is set at 8 degrees but will ping more and starts back firing if timing is at 6 degrees. The more I advance it the better it runs. I have took it as high as 12 degrees+ has any one else had this problum. When the engine was installed I checked the balancer to see if it had spun and it was still dead on. Another thing I have noticed is that it feels like it is unbalanced between 1,700-2,200rpm then it settels down. Any ideas?

 

[V895]

Re: 4.3 Pings

Re: 4.3 Pings

Nobody know?



I wonder if the incoming air is too hot and cuzing it to ping.

 

[V895]

Re: 4.3 Pings

Re: 4.3 Pings

NOBODY :dunno: :shoot:

 

[V895]

Re: 4.3 Pings NOBODY KNOW?

Re: 4.3 Pings NOBODY KNOW?

Will a Alky kit help me out? :rant:

 

[jwaller]

Re: 4.3 Pings

Re: 4.3 Pings

something doesnt sounds right. are you sure you are setting the timing on the right mark. stock balancers have 2 marks that are kinda close to each other. alky will help in the respect that it will increase the octane rating of the fuel

 

[V895]

Re: 4.3 Pings

Re: 4.3 Pings

The timing was set a 6+ but pinged worse than it does when it is set at 8+ but when the out side temp drops it will stop pinging and start runing great but if it is above 75 degrees out it starts pinging at 3500

 

[V895]

Re: 4.3 Pings

Re: 4.3 Pings

It makes me think of a pluged air to air (full of bugs and dust) and a very poor ignition retard system

 

[V895]

Re: 4.3 Pings

Re: 4.3 Pings

Edelbrock says my dizzy might be out of time with my cam and they said try backing my dizzy off one tooth and trying that.

 

[Bill Z]

Re: 4.3 Pings

Re: 4.3 Pings

R U running a stock chip? My truck tuning instructions tells me to set timing to zero (at top dead center). When I run any thing before, it runs worse. My truck runs different than yours but I have the Ultimate chip and a 3 bar MAP.

My experience is that the more advance you time your truck, the more chance it will start pinging under load.

 

[dgoodhue]

Re: 4.3 Pings

Re: 4.3 Pings

R U running a stock chip? My truck tuning instructions tells me to set timing to zero (at top dead center). When I run any thing before, it runs worse. My truck runs different than yours but I have the Ultimate chip and a 3 bar MAP.

My experience is that the more advance you time your truck, the more chance it will start pinging under load.

I beleive he doesn't have SyTy motor. Its a modified 4.3

 

[jwaller]

Re: 4.3 Pings

Re: 4.3 Pings

Edelbrock says my dizzy might be out of time with my cam and they said try backing my dizzy off one tooth and trying that.

changing the tooth that your dist uses has no affect on what your talking about as long as you set the timing the same. it will only clock the base in a different location. I still say to make sure you need to be sure your using the right mark on the balancer. I would set it to zero as it's supposed to be and then find out whats wrong. your band-aiding a problem with what your doing and it shouldnt ping like that. be sure your retarding system is working. knock sensor is hooked up ad working and that your ignition system is in top order.

 

[V895]

Re: 4.3 Pings FIXED

Re: 4.3 Pings FIXED

I finally fixed the problum. It was that my ignition curve was off and that was what was needed to set by backing my dizzy off one tooth :tup: