- This topic has 5 replies, 6 voices, and was last updated 11 years, 8 months ago by
.
-
Posts
-
I’m not much of a gearhead, but I’m getting started. So this may be an
easy/stupid question…Just bought the car a week ago (Fiberfab 1987 MG TD kit, with 1975 2.3L L4 mustang II engine and Weber
32/36 DGV carb), and ran it for a few miles. Max running time for me is probably
less than 1 hour total (between multiple passes around the neighborhood on
different days). It was rough idling initially, but now will not start. It cranks but doesn’t catch. I thought flooded but no evidence of fuel in the carb or pistons.I pulled
the fuel filter and hose and turned the ignition, and i don’t see any gas coming
out of the hose within the first 15-20 seconds (after that I stop). The very last
time it ran, it died during idling after about 8-10 minutes of low speed
driving and my wife and I pushed it back to the house. Engine temp was around 180-190F. Since it died out, i haven’t been able
to get it started up again.Questions
– Should the fuel hose be full
of liquid the entire time? I had no “spill” issues when pulling the filter from
the carb, etc. Hose appears to be dry. Could be vapor lock?? If so, can i just
“fill up” the hose with gas, reconnect it to carb, and run it to see if that’ll
eliminate problem.
– How can i otherwise check the fuel pump, besides pulling
the delivery hose which i’ve done? I’m trying to isolate if it’s the pump, vapor
lock, a clog in the line, etc.
– It was sitting for years before I got it,
so i thought it could be sediment or bad gas. I topped off the tank, and put an
STP carb cleaner in the tank. Would E10-gas have been an issue (if the previous
owner put gas in it for me to drive it away? Seems like it would cause issues
that quickly.Sounds like you have a clog in your fuel line. Vapor lock would go away after sitting a while. I would disconect fuel line at inlet of fuel pump and use compressed air to blow back towards the gas tank. Old days would have put mouth on line and blowed with breth to clear. Gas now doesn’t taste the same. Also check your filters. and make sure you have gas in the tank. Empty tanks cause problems . Don’t ask about empty tanks.
Crud in the gas tank blocks the fuel line. If you can take the tank out and dump the crud out & clean it, maybe coat the inside with one of the POR 15 -type tank liners, you’ll be good to go.
–Actually, you might want to consider replacing the rubber/neoprene bits of your fuel line as well.
If you can’t take out the tank, you might get away with blowing out the line, draining it, starting with new gas. But the scale and crud will probably linger and stop you a couple times more before it totally clears up.
Whatever you do, keep an eye on your filter(s).
edsnova2013-08-06 14:07:14
I have similar problem. Hook a syphon hose to the carb. If it starts its the fuel pump or blockage from gas tank to fuel pump if you disconnect fuel line at fuel pump lay fuel line on ground or floor gravity should let it run freely. If you decide that its the fuel pump remove it. There is a pin that goes through the carb that some times works its way out. Make sure that it sticks out equal on both sides of carb buy some JW weld or epoxy an put it on both ends of pin. You could also disconnect line after pump to see if it pumps gas
Since you mentioned it, I doubt it is a vapor lock issue – vapor lock is usually caused by heat partially vaporizing the fuel in a line somewhere.
Also, once the car cools completely, the vaporized fuel will condense again, and the vapor lock will go away — and the engine will run again — until it gets hot again…With engine temps of only 180-190, it doesn’t sound like the engine is overheating, so that points to something other than a vapor lock, IMO.Early FF TDr on 69 VW pan
Slowly coming back from the ashes...I assume its a frame mounted electric pump. Also assuming the pump makes noise like its running with the key on.
Disconnect the feed line from the tank at the pump inlet. If line is open fuel should run out( use a drain pan) An older electric pump might just be getting tired and running intermittently. If you can, stick another pump in it. I now run an inline filter before and after the pump.Bill Ascheman
Fiberfab Ford
Modified 5.0, 5sp., 4:11
Autocross & Hillclimb
"Drive Happy"
- You must be logged in to reply to this topic.