Crossfire TBI pressure

[boomdriver]

Question:

how is fuel pressure checked on a crossfire? Is there a test port for a gauge? or do you have to splice a gauge in the line somewhere temporarily?

I ask because a buddy inherited a Chevy P/U with a TBI motor and seems to be having intermittant FP issues. We were wondering where the correct place would be to put a gauge and then,

go about setting the fuel pressure...
New fuel pump, sock & filter. Hard to start hot,. easy cold. Seems to have low or no press during the hard start episodes. No spray, just dribbles. Once started it sprays fine. Intank pump.

 

[JohnGrawcock]

Checking fuel pressure is a pain on the Crossfire. There is no test port. You have to remove the fuel line that runs between the two TB's and then remake that connection with a temporary line with a pressure gage T'd in. Many people have just permanently installed a gage in the line.

 

[boomdriver]

Checking fuel pressure is a pain on the Crossfire. There is no test port. You have to remove the fuel line that runs between the two TB's and then remake that connection with a temporary line with a pressure gage T'd in. Many people have just permanently installed a gage in the line.

Thats what I was afraid of....

Thanks for the info !

 

[ex-x-fire]

On my 84 the fuel filter is clamped to rubber hoses from the factory, you could remove the filter(temporary) & tee into there. Most universal f. press. kits have a tee to do that.

 

[JohnGrawcock]

On my 84 the fuel filter is clamped to rubber hoses from the factory, you could remove the filter(temporary) & tee into there. Most universal f. press. kits have a tee to do that.

That would put you ahead of the regulator. For regulated fuel pressure the gauge needs to be in the line between the two TBI units.

 

[ex-x-fire]

Anything from the fuel pump to the rugulator is regulated. The front injector can't add pressure, it has some sort of compensator(free flowing?).