Georgia Mike
NAXJA Forum User
- Location
- Flowery Branch,GA
Just figured I'd run this one by you guys here,too. Here's the problem the same as I also posted on the IFSJA web site:
OK,here's what I've got:
1983 Chero,360,auto,MC carb.
This is my problem:
I was having the dreaded vapor lock problems,so I switched to an electric fuel pump,this cured my ailments,until recently(approx. 3 mos. since pump swap). Now it's acting like it's running out of gas,kind of like it's just not pumping the fuel fast enough to feed the engine's needs under power. It seems to run fine if I just putter around like Granny,but if I take it out on the expressway,it starts up with the starvation problems. I originally thought it was the pump's pre-filter clogging up,so I swapped it for a fresh one with no improvement. Then I thought it was the cheap-o Auto Zone electric pump I put on it,so I went out and bought a Holley "Red" electric pump. Put it on with yet another new pre-filter,and still the same ol' thing! If I go out and mash the throttle to the floor it will accelerate like normal,until it starts the running out of gas thing,and will stay in a "sputtering" state as long as I hold the pedal to the floor (NO power,just barely staying running all the while). Just for experimental purposes,I held it in this state for approx. 15-20 seconds,it got no worse or no better,just barely ran. I've noticed no odd tank pressure at the cap,the filter at the carb is the correct type and isn't clogged. It's not mounted entirely horizontal,but it's more like at about a 25-30 degree upward angle with the return line in the upward position. The carb was rebuilt about a year ago by the PO,and it runs exceptionally well under all conditions,so I'm not convinced it's the culprit,although I haven't ruled it out yet. Can anyone show me the light? Please? Thanks in advance!
P.S.-Someone mentioned to me that the fuel tank's line could be collapsed at the top of the tank from being over 20 years old, Anyone experience this before? How about what's inside the tank? Plugged screen or something? I really don't know all that much about fuel tanks and what all the correct terminology is for them. HELP!!
OK,here's what I've got:
1983 Chero,360,auto,MC carb.
This is my problem:
I was having the dreaded vapor lock problems,so I switched to an electric fuel pump,this cured my ailments,until recently(approx. 3 mos. since pump swap). Now it's acting like it's running out of gas,kind of like it's just not pumping the fuel fast enough to feed the engine's needs under power. It seems to run fine if I just putter around like Granny,but if I take it out on the expressway,it starts up with the starvation problems. I originally thought it was the pump's pre-filter clogging up,so I swapped it for a fresh one with no improvement. Then I thought it was the cheap-o Auto Zone electric pump I put on it,so I went out and bought a Holley "Red" electric pump. Put it on with yet another new pre-filter,and still the same ol' thing! If I go out and mash the throttle to the floor it will accelerate like normal,until it starts the running out of gas thing,and will stay in a "sputtering" state as long as I hold the pedal to the floor (NO power,just barely staying running all the while). Just for experimental purposes,I held it in this state for approx. 15-20 seconds,it got no worse or no better,just barely ran. I've noticed no odd tank pressure at the cap,the filter at the carb is the correct type and isn't clogged. It's not mounted entirely horizontal,but it's more like at about a 25-30 degree upward angle with the return line in the upward position. The carb was rebuilt about a year ago by the PO,and it runs exceptionally well under all conditions,so I'm not convinced it's the culprit,although I haven't ruled it out yet. Can anyone show me the light? Please? Thanks in advance!
P.S.-Someone mentioned to me that the fuel tank's line could be collapsed at the top of the tank from being over 20 years old, Anyone experience this before? How about what's inside the tank? Plugged screen or something? I really don't know all that much about fuel tanks and what all the correct terminology is for them. HELP!!
