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Car Forum / Pontiac / Pontiac Firebird / March 2008

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MPFI to carb?

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hungry 103 - 01 Mar 2008 07:19 GMT
I have a 1988 Camaro RS with a 2.8 MPFI and I am planning to swap the V6
for a 350 with a carb.My question is...can I use the same fuel tank/pump
with a regulator to lower the fuel pressure? Or will I need to change
the tank to one for a carb?
The Reverend Natural Light - 03 Mar 2008 18:50 GMT
> I have a 1988 Camaro RS with a 2.8 MPFI and I am planning to swap the V6
> for a 350 with a carb.My question is...can I use the same fuel tank/pump
> with a regulator to lower the fuel pressure? Or will I need to change
> the tank to one for a carb?

Either will work.  Pulling the tank is such a pain on those that
you're better off leaving the electric pump and installing a
regulator.  It should be the type with an inlet, an output to the
carb, and a return line to the tank.

Have you considered using a fuel injected V8?
hungry 103 - 05 Mar 2008 07:22 GMT
That's what I want to get away from.This car has some serious wiring or
computer problems.This is the second time I have owned this car.I put
alot of money in it with no results.Two more people have owned it with
the same results.I recently bought it again,pulled it home with the
intentions to pull the V6 and put a nn computer carb V8 in.The V6 isn't
in that good of shape anyway.It's had the fuel pump,most if not all of
the sensors changed,timing chain and probably other things changed.It
has a real bad idle,goes up and down,floods alot,won'y start when the
engine is cold.Spray a shot of carb cleaner in and it fires right
off.Too much $$$$ has been spent on it so I'm going to fix it the way it
should have been in the first place....with a V8.
Andy Warren - 14 Mar 2008 03:02 GMT
>I have a 1988 Camaro RS with a 2.8 MPFI and I am planning to swap the V6
> for a 350 with a carb.My question is...can I use the same fuel tank/pump
> with a regulator to lower the fuel pressure? Or will I need to change
> the tank to one for a carb?

The pump in the tank will be fine. You will need a "bypass" regulator.
They're a little pricey but cheaper and a lot less hassle than changing the
pump. Since the ECM controls the pump relay you'll need to rewire it to run
at key-on.
You will also need a vacuum advance distributor and a non-CC carb. A couple
of other things may need tending to like if the 2 electric cooling fans, one
is run by the ECM. Most folks just wire it's relay to run at key-on. If you
have an auto trans, the torque converter clutch lockup is controlled by the
ECM also. Parts places like Jegs sell kits to convert the TCC to non-ECM
operation.
Hopefully you live in a non-inspection state like me (AL)...

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