Argh!I have a recently built forged 346.Recently changed regulator and i read 55 psi at start up.Mods are
346
Mahle 3.898 pistons
MS3 camshaft
Ls6 Heads
Typhoon Heads
Ls2 Chain
3 inch header...
Problem is thing thing floods like crazy and pours out unburnt fuel out the exhaust likes crazy and bogs real bad.It wont bust unless the throttle opened up quite a bit and even then it wont idle on its own.I had a small base tune done also..any ideas

 

More tuning. Sounds like you don't have a tune for the injectors...

 

think so?I had two or three supposed tuners look at it?..

 

Do you have bigger injectors in there? You said you have a baseline tune. What was done in the tune? And 2-3 tuners looked at a baseline tune?

 

stock factory injectors...baseline consisted of tuning idle air flow etc for ms3....someone told me its possibly a bad engine ground causing injectors to go into max effort

 

Stock injectors... okay so no tuning done on them.

MAF or SD tune?

Any codes?

Did you check the three ground wires on the back of the head?

 

Get the thing to a proper LS dyno tuner or your engine is going to be trashed.

 

might be little in left field but when i did my swap i forgot to tighten the bolt for the ground near the passenger headlight left of the air lid and every time i flash my high beams my fuel pump would shut off. Just make sure all grounds are tightened up or unplug your maf and see how that works out.

 

Don't drive another Inch, you are washing the cylinder walls if there's gas "flooding" as you say.. Say goodbye to the new engine if you keep trying to drive it..

Tow it to a competent tuner