ari666
250,000 hits
- Joined
- Mar 10, 2009
- Messages
- 11,835
- Reaction score
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- Location
- melbourne
- Members Ride
- 1966 impala, R32 GTR
hi all
as the title says i am pulling my hair out trying to understand how the fuel pump operates in a VK. i bought a Vb-vk manual which covers the mechanical fuel system in depth, but only explains how to drop the tank and re-fit for electric.
my problem is that it appears my fuel bowl is running out of juice when i tramp it. it takes off like a rocket then stutters at which point i back off, then it runs normally again.
this thing has an electric fuel pump in it which dosnt get power when the car is in the 'on' position, but somehow gets power when it is running.
also, i always thought that electric fuel pumps need to have a fuel return hose fitted to avoid overfueling which is unnecessary on mechanical fuel pumps as the pressure is determined by the camshaft, but the carb doesnt have any means of returning it. is there some kind of pressure switch on the fuel line which switches the pump on and off?
there is a tiny metal pipe which runs back to the tank. i am assuming it is meant for fuel return, as my friends HQ 308 ute (mechanical pump) does not have it. would running a 't' piece near the carb in the fuel hose act as a return? or would it just pump half the petrol back to the tank and not to the carb?
it has also started to act up in the morning if it has been parked for 24 hours. i have to connect power to the fuel pump fuse till the carb bowl fills up, then it will start, otherwise it just cranks with no fire.
blah. cars bite.
as the title says i am pulling my hair out trying to understand how the fuel pump operates in a VK. i bought a Vb-vk manual which covers the mechanical fuel system in depth, but only explains how to drop the tank and re-fit for electric.
my problem is that it appears my fuel bowl is running out of juice when i tramp it. it takes off like a rocket then stutters at which point i back off, then it runs normally again.
this thing has an electric fuel pump in it which dosnt get power when the car is in the 'on' position, but somehow gets power when it is running.
also, i always thought that electric fuel pumps need to have a fuel return hose fitted to avoid overfueling which is unnecessary on mechanical fuel pumps as the pressure is determined by the camshaft, but the carb doesnt have any means of returning it. is there some kind of pressure switch on the fuel line which switches the pump on and off?
there is a tiny metal pipe which runs back to the tank. i am assuming it is meant for fuel return, as my friends HQ 308 ute (mechanical pump) does not have it. would running a 't' piece near the carb in the fuel hose act as a return? or would it just pump half the petrol back to the tank and not to the carb?
it has also started to act up in the morning if it has been parked for 24 hours. i have to connect power to the fuel pump fuse till the carb bowl fills up, then it will start, otherwise it just cranks with no fire.
blah. cars bite.