What kind of fuel shut off does a 90 Mack have?
What kind of fuel shut off does a 90 Mack have?
Just a thought, what kind of fuel shut off does it have electric or cable, make sure it’s opening all the way.I have a 90 mack that had an electric air shut off on the pump,I had to take it off and hook up a cable shut off because sometimes it wouldent shut the fuel off and sometimes it wouldent turn it on. 3 weeks later…
Where is the fuel pickup tube on a Mack?
I know that most Mack tanks have the fuel pickup tube welded into the top of the tank, but if that turns out to be the problem, it’s possible to use a hole saw and bore another hole in the top of the tank, weld in a female pipe fitting of the correct size and fabricate a screw in pickup tube as described earlier.
Why does my Mack E7 engine not start?
Turns out the ECU is very sensitive to voltage drop. Anything below 11.5 volts and it gets the lack of will to work. Mack have installed a voltage warning light in the dash ( just a little red LED ).
What kind of engine does a Mack rd688 have?
I have a 2002 Mack RD688S with an E7 engine in it. When you turn the key on, it powers up and everything seems fine, but when you go to start it, it wont start. We changed the ECU with one that works, and we checked the VECU also transfer pump if it has one. been there done that…………… BMT Certified Know-It-All!
Just a thought, what kind of fuel shut off does it have electric or cable, make sure it’s opening all the way.I have a 90 mack that had an electric air shut off on the pump,I had to take it off and hook up a cable shut off because sometimes it wouldent shut the fuel off and sometimes it wouldent turn it on. 3 weeks later…
Turns out the ECU is very sensitive to voltage drop. Anything below 11.5 volts and it gets the lack of will to work. Mack have installed a voltage warning light in the dash ( just a little red LED ).
I have a 2002 Mack RD688S with an E7 engine in it. When you turn the key on, it powers up and everything seems fine, but when you go to start it, it wont start. We changed the ECU with one that works, and we checked the VECU also transfer pump if it has one. been there done that…………… BMT Certified Know-It-All!
I know that most Mack tanks have the fuel pickup tube welded into the top of the tank, but if that turns out to be the problem, it’s possible to use a hole saw and bore another hole in the top of the tank, weld in a female pipe fitting of the correct size and fabricate a screw in pickup tube as described earlier.
