my 350 tbi will only rev to 1850 and then the block learn and integrator goes to 150 and 158 but if I give it full throttle it will rev fine. all i did is change to a higher flowing fuel filter for my aftermarket pump.

 

Could the injectors be bad?

 

HEY your injectors are too big for this combo!

 

How can they be when block learn is above 128 it means the computer is telling the injectors to put more fuel in b/c its running lean.

55lbs injector are stock in 350 truck
89 cop car had 65lbs but then the car was way rich at 10 psi so i put in truck injectors and cranked the fuel pressure to 13.5 and it ran great for about 3 weeks.

 

Your injectors are probably too small, and the PROM not optimized for your combination. Chip work is key to making power in a TBI.

BTW, stock 350 trucks have 61 lb/hr injectors from GM. 305s got the 55 lb/hr injectors.

 

oh so i got 61lbs injectors there from a 350 tbi truck. but just giving them more psi would give me more fuel. evreything is perfect till 1850rpm then my snap-on scanner shows im insanly lean and it wont rev anyhigher unless i punch it.

But if i turn fp up it runs rich under 1850 rpm and then at 1850rpm it does the same thing unless i stand on it.

 

Q: But if i turn fp up it runs rich under 1850 rpm and then at 1850rpm it does the same thing unless i stand on it.

needs a datalog. needs a tune. then another datalog. etc etc etc.

funny mine runs A-OK in daily cruise mode and lean WOT. tune wont help that. i need more FP!