89 buick 2.8 ltr fi

My 89 Buick will only run if I continually pump the gas pedal. If I stop it stops. I have changed the fuel filter and the fuel pump seems to be working
because if I turn the key when the fuel line going into the filter is disconnected it does come out of the line. Spark also seems good on all plugs.
thanks for any ideas
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Unhooking the fuel line and letting fuel come out doesnt prove that it can produce the amount of fuel pressure that engine requires to run, my suggestion, replace the fuel pump.

it
working
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
That is odd. I have a '91 Grand Prix with a 3.1L and when she was 99.9% out of gas, the only way I could keep it running was to pump the gas pedal.

it
working
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
jim wrote in alt.autos.gm

On a fuel injected car, gas should do more than just come out of the line. Pressure should be about 40 psi, so it should squirt like hell.

--
Dick #1349
"They that can give up essential liberty to obtain a little temporary
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

it
working
There is a test valve on the fuel rail for the injectors. You need to have between 40 to 80 PSI at point.
Your problem could be anything from clogged fuel injectors, bad injectors, no injector pulse, a bad coil module, a bad fuel pressure regulator, or even a bad ECM.
First have the fuel pressure tested at the fuel rail. Then have one of the injector connectors pulled and checked for pulse. On the style 2.8 V6 you have, 1 or 2 injector harness connectors can be accessed with out removing the upper intake. If you have pulse, then the coild module is most likely working correctly.
From there you need to have your ECM read with a scan tool, not just flashing the codes. A scan tool can view the readings the ECM is getting, not just point to a circuit that has an issue. Charles
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.