from tbi to carb

[chrisfrom nj]

i converted my 92 rs from tbi to carb now i cant get my car to start i put a mechanical fuel pump in i put gas in the carb the car starts but the pump isnt pumping any fuel i put in a glass fuel filter i allso cut a hole in the trunk with a air chisel to pull the eletric fuel pump out im a few steps away and im finished

[Tru2Chevy]

Does the cam have a lobe for a mechanical fuel pump? I dunno if TBI cams did or not.

- Justin

[bubba428]

wouldn't that have an OE roller cam????

[BonzoHansen]

That could be the issue. Should have just put a regulator inline and kept the tank pump.

[Tru2Chevy]

wouldn't that have an OE roller cam????

Yes. But what difference does that make? My '87 came with a mech. fuel pump and a roller cam....

- Justin

[chrisfrom nj]

Does the cam have a lobe for a mechanical fuel pump? I dunno if TBI cams did or not.

- Justinthe engine is a 350 it was changed by the previous owner

[bubba428]

that would make a cam very expensive

[chrisfrom nj]

That could be the issue. Should have just put a regulato inline and kept the tank pump.i had problms with the vats thats why i got rid of all the fuel injection stuff

[Tru2Chevy]

i had problms with the vats thats why i got rid of all the fuel injection stuff

You still could have kept the in-tank pump and just installed a regulator. And then you wouldn't have had to attack your car with an air chisel.

- Justin

[chrisfrom nj]

You still could have kept the in-tank pump and just installed a regulator. And then you wouldn't have had to attack your car with an air chisel.

- Justinit was fun with the air chizzle in the future the hole is going to get welded and a fuel cell will be installed

[chrisfrom nj]

that would make a cam very expensivei think the car had a cam it ran strong and idles rough

[bubba428]

then theres no way with out pulling the cam to tell if it has the loab

[chrisfrom nj]

im not going to pull the cam

[Tru2Chevy]

im not going to pull the cam

Then you should just take off the mechanical pump now and install an inline electric pump. If it's a new pump and it isn't working, chances are good that whatever cam is in there has no provisions for a mechanical fuel pump.

- Justin

[deadtrend1]

The fuel pump pushrod goes in before the cam is installed right? I haven't messed with one for years, but you can't install or remove the rod through the side of the block right?

So the cam had to be pulled to install the mechanical pump. Right?

[chrisfrom nj]

i put in a new fuel pump push rod

[BonzoHansen]

The fuel pump pushrod goes in before the cam is installed right? I haven't messed with one for years, but you can't install or remove the rod through the side of the block right?

So the cam had to be pulled to install the mechanical pump. Right?

dumbass, it comes out the side with the pump. :lol:

[bubba428]

it just rides the loab
<wrong pic removed, lol>

[deadtrend1]

dumbass, it comes out the side with the pump. :lol:

are you sure, I remember on a motor once it was giving me crap and would not come out the side.

Thanks for the dumbass comment though! :moon:

[//<86TA>\\]

i put in a new fuel pump push rod

did you use a bolt in the front of the block to hold the pushrod in place while you installed the pump? did you forget to take the bolt out? The pump wont work with the bolt left in...dont ask how i know this...

ive never seen a SBC cam without a mechanical pump lobe
________
WENDIE 99 (http://www.lovelywendie99.com/)

[chrisfrom nj]

when i pulled the plate off there wasnt a pushrod for the fuel pump i ordered one when i ordered the fuel pump allso i need to know what fitting i need that will screw in the pump the reason why the fuel wasnt pumping is because the fuel line didnt seat right it was sucking up air i screwed it on all the way but the pipe was loose

[deadtrend1]

it just rides the loab


no, theres a pushrod

[//<86TA>\\]

its some kind of inverted flare fitting on a stock pump, i have one for -6an somewhere...
________
Washington Medical Marijuana (http://washington.dispensaries.org/)

[chrisfrom nj]

no, theres a pushrod
bubba thinks its a old 4 cyl import engine lol

[chrisfrom nj]

its some kind of inverted flare fitting on a stock pump, i have one for -6an somewhere...i tried to screw in the stock fitting it screws in but the pipe is still loose do you have a pic of the fitting

[chrisfrom nj]

i got the right fitting and hooked up the lines and still no good the pump doesnt pump

[FBODS4EVER]

chris, im doing the same thing. someone put a 350 in my formula before i bought it. and left everything else stock. it back fired and wouldnt stay running. chip was trying to feed the 350 a 305's needs. so i went carb. i left the factory fuel pump intact. and went with a 3 port fuel pressure regulator. w/ a bypass. however i am changing the whole top end. heads cam manifold and carb. i am with a few others. your cam may not have the lobe being a roller motor. whatever the outcome let us know what it is.

[chrisfrom nj]

chris, im doing the same thing. someone put a 350 in my formula before i bought it. and left everything else stock. it back fired and wouldnt stay running. chip was trying to feed the 350 a 305's needs. so i went carb. i left the factory fuel pump intact. and went with a 3 port fuel pressure regulator. w/ a bypass. however i am changing the whole top end. heads cam manifold and carb. i am with a few others. your cam may not have the lobe being a roller motor. whatever the outcome let us know what it is.i will keep you posted

[chrisfrom nj]

i put it together and still no fuel