William,
The new valve springs will reduce float due to the higher lift at full rpm.
Id do it in the long run, but its not manditory to get it running right....
A scanner shure would help to figure out whats going on!
Bruce
----- Original Message -----
From: "Willliam H. Hiatt III" <william@hiatt.net>
To: <dakota-truck-moderator@bent.twistedbits.net>
Sent: Monday, September 09, 2002 12:01 PM
Subject: DML: 4.7L HO Again!
>
> In my never ending quest to solve Ed's (as well as my) pinging problem, I
> stumbled across this:
>
> The 4.7 flows 22.5 lb/hr @ 49psi, while the 4.7 HO flows 25.8 lb/hr @
49psi.
> Is this difference in the injectors, or is it all in the PCM? I'm thinking
> my pinging is because the truck is leaning out when you snap the throttle
or
> on acceleration.
>
> Also, the 4.7 valve springs are as follows:
>
> 6.69 coils
> 3.28 wire diameter
>
> While the 4.7 HO valve springs are as follows:
> 7.30 coils
> 4.77 wire diameter
>
> Is this something to warrant changing as well (I know it won't affect
> pinging/etc, but just for longevity sakes)
>
> And last but not least, the 4.7 HO spark plugs. They have a platinum rivet
> located on the tip of the center electrode. Why would Dodge run these
> platinum plugs in the HO?
>
> Thanks
> william
>
>
>
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:05:20 EDT