4.3 Running rich

[1998_K1500_Sub]

Nope - 1,4,6, and 7 are fed by one injector and 2,3,5, and 8 are fed by the other.

So on a 4.3L, cyls 1,4,6 are on one plane and 2,3,5 are on the other?

 

[PlayingWithTBI]

So on a 4.3L, cyls 1,4,6 are on one plane and 2,3,5 are on the other?

Oops - my bad, it's not an 8 cylinder.

 

[1998_K1500_Sub]

Oops - my bad, it's not an 8 cylinder.

Honest mistake But do you know the answer?

Cyls 3,4,6 sound plausible on one plane.

 

[PlayingWithTBI]

Cyls 3,4,6 sound plausible on one plane.

I does sound plausible but IDK, never messed with a 4.3L

 

[Little blue]

Have you downloaded and looked thru fuel and emissions service manual that thread is in sticky threads above it is titled 88-98 service manuals. Also make sure map sensor hose is good and egr is not sticking or binding and fuel pressure isn't high and grounds are good. Hope this helps

All the vacuum lines are new map is new egr seems to be working it doesn’t leak and holds vacuum. All the grounds have been gone through. How can I check fuel pressure?

 

[docstoy]

In line fuel pressure gauge will install at fuel filter location also discussed in f&e manual