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Yamaha g1, runs cold when warm hard time starting, pumps gas out the everflow line. replaced ig. coil and fuel pump, took air filter out tried adj. carb. no luck

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Carb float level needs setting to correct height and needs cleaning

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2 Answers

Atv will not start


Is your choke working OK? Even in the summer time a cold engine needs a littel choke...more gas than air to get started. But you don't need to keep the choke on for very long in the summer since the engine warms up faster. You could try some carb cleaner or even taken the carb off and cleaning it good because it sounds definitely like a fuel problem so it was a good idea to check the pump and filter.

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96 Toyota 4Runner sputters when starting when hot only!


how about the fuel filter. I didn't see this on your list and it should be done every 20000km and the air filter. I think its a fuel filter. not the pump. could be the coils but I would start cheap and change fuel filter first. when the pump is cold it pumps with more psi to blow passed the clooged filter after warm it is weaker and has a hard time pushing through the clog

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1986 Ford F150 not getting fuel.


Does it run good using the back tank?if so then the fuel line may be clogged in the front tank.Need to blow it out and check for leaks.

Jul 08, 2017 | Cars & Trucks

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I have a 1996 Mercury Villager (Canadian version) with 60 K miles. Sometimes when starting, the engine turns but it wont start. When this situation occurs, I usually try to start again while pressing on...


I would definitely consider the fuel pump. I had long turnover times before starting for years, but even worse was in hot weather it would just stall while driving. Sometimes it would only idle, but not run if you pressed the gas very far. Park it for 20-30 minutes and it would run again without another problem for weeks. Dealers and mechanics kept replacing other things like ignition coils and distributors. After a conversation where someone said they had the same problem, but only when they had less than half a tank of fuel, I knew it was the pump. I replaced it myself and all problems went away.
The fuel leaks back down to the tank and air gets in the lines. Then the pump is slow to build pressure up again. If you turn the key on, but not start, wait 45 seconds, off, on again but not start, wait again, now start it will take a little less time to start, less battery drain, until you fix the problem.
You may not have the heat problem in Canada. But here in Georgia it gets hot enough that if the fuel tank is low and the pump has this problem, it will overheat and shut down till it cools. A full tank helps it keep the pressure up and serves to cool the pump.

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Have replaced your glow plugs?They dont cost alot to replace,try this

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Occasionaly the engine shuts off and won't start on JD gx345.


If the fuel pump is working correctly then the problem is between the tank and the pump. run a fuel line from the pump to a gas can. If the pump is working it will siphon the fuel into your filter. If the pump is fine then there is blockage, broken fuel line (sucking air), or something blocking the pick up inside the tank.

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1998 Chevy tahoe Hard to start when cold


replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump

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CAR TURNS OVER BUT WON'T START


check if got a spark , pull off HT lead wire hold it 6 mm from coil or ground, crank engine if good spark is present during cranking, then check your fuel pump, if not check ig. coil and amplifier. first see timing belt make sure it is turning with engine cranking.

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Fuel pump not running only in cold weather


Pumping the pedal on an injected engine does nothing, except varying the air intake amount. I would change the fuel filter (if badly plugged, it may be causing the pump to shut off early) and clean the idle air control valve.(which should regulate idle air flow, eliminating the need for playing with the pedal) The valve itself is not difficult to service, but is a bit delicate. It can be cleaned with carb cleaner. just make sure you do not turn the valve end around while cleaning, and re-install it perfectly straight. You may have a bad drain back valve in the pump, but this is less common than what I outlined above.(there are tests for this)

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