Fuel Spider -> Anything else to change while there?

[95 S_Trucker]

Originally Posted by rockosocko

I did a "Delphi" spider upgrade that has 8 actual little injectors on my '97 5.7 (after my wife ran it hot from not looking at the gauge, and then NOT TELLING me after.. Pouring coolant from intake gasket sagging past the water port into lifter valley due to the overheating.

..Anyhow, It started within 3 rev's and ran VERY smooth right off. Great throttle response to.
Remember to check or replace the o2 sensors. If they go bad with this crappy gas it funnels bad EGR gasses back in the intake. (you'll notice lots of black soot/carbon deposits if you take the intake apart. I had to use a drill and die grinder to clear the EGR port!! but the o2 sensors looked 'clean'..?)
Then get on Youtube and search for the BIG-3 Wire grounding. It will all help with your ignition of the fuel even if you don't do the spider swap.
https://www.partsgeek.com/hz45xn3-ch...+Fuel+Injector
Hope it works.
E

The oxygen sensors don’t have anything to do with the egr valve. The egr valve is used to lower combustion temperatures, which reduces oxides of nitrogen. The egr valve will not affect the air fuel ratio. The oxygen sensors will not affect the egr valve. Every engine that isn’t carbureted or throttle body injected will have tons of carbon crud in the intake. It’s normal for carbon to stick to the inside of egr valves and tubes as well. I see cars all of the time that have the tube sealed shut with carbon. I contribute it more to fuel quality.