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"They" would need to be defined in order effectively answer this question. In many cases mechanical devices that run on a chemical fuel require some form of priming in order to begin combustion.
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∙ 10y ago
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If your 1993 Chevy 1500 4.3 runs after primed but will not restart unless primed is it fuel pump?
Probley is the fuel pump, Need to check fuel pressure with a gauge. It should have no less then 9 LBS. are it will not start. Pressure specs are 9 to 13 LBS
Why your blazer wont start unless its primed?
BAD FUEL PUMP. Need to check fuel pressure with a gauge first. You did not say what year it was or engine size, this would help with the answer.
Why wont your deisle engine start after running out of fuel?
Diesel engines need to be primed when the have ran out of fuel. You should be able to find the primer either ontop of the fuel filter on near the inlet manifold
How do you prime a fuel pump in 1994 chev caprice?
It's an "in tank" fuel pump. The pumping mechanism is actually IN the fuel at the bottom of the tank so it doesn't need to be primed. If it's not functioning then you have another problem.
If your 91 caprice won't start but starts when primed what should you look for other than the fuel pump?
Fuel pump fuse and relay. Fuel filter.
Engine will start if primed but quickly dies?
There is no fuel getting to the combustion chamber. Things to check: clogged fuel filter; crimped fuel line; carburetor settings; obstruction in fuel tank.
How do I get a 350 Chevy motor started without itbeing primed wilh fuel?
squirt a little gas in the carb.
What does a primed mirror mean?
I have no idea what a primed mirror is.
Why is there no fuel pressure on 94 jimmy with new fuel pump and regulator?
Ensure that the fuel Pump is PRIMED and also that the electical connections are good to it. If all is good there, check for a kink/leak across the lines.
How do you get air out of the fuel injectors for a 94 subaru?
Start the engine with starting fluid. You should only need to run it that way for a few seconds then the fuel should be through the line. If that doesn't solve the problem, it's more difficult than just getting the line primed.
You have 1989 e 150 when its primed threw the injectors it will run when fuel burns off it stop running doesnt appear to be getting fuel?
Sounds like a faulty fuel pump. The fuel filter could also be plugged up.
Does diesel system have to be primed when you remove and replace in tank sending unit so fuel gauge will work?
no it is not required if the pump is in the tank
