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Old 03-27-2012, 09:36 PM   #1 (permalink)
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Default 1987 samurai will die upon accelerate

Just bought a 1987 samurai with the 1.3. Will idle smooth as can be but when I go to throttle up it dies unless I let off... I'm new to the samurai however if I get this fixed I think I will love it! Any info is appreciated!
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Old 04-12-2012, 08:52 AM   #2 (permalink)
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hello take a look on your fuel filter if its look dark replace its only $6.00 and easy to do ,and check if you have any vacuums hose lose ,this carburetor are very sensible to lose hose
good day
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Old 04-14-2012, 08:46 AM   #3 (permalink)
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What carb do you have fitted? The original carbs have issues when they get old and can cause problems similar to this.

Mine would die if I tried to accelerate - but I had a snorkel, and I found that if I leaned out of the window and put my hand over the air intake and manaully choked it, it'd run ok (I was in a field at the time).

Eventually replaced the carb and it ran just lovely.
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Old 04-29-2012, 02:12 PM   #4 (permalink)
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Well I ran new fuel line and filter, ran great the last 3 weeks, now its doing it again. I did loose the washer that goes underneath the nut on the air cleaner.. Will this cause any issues?
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Old 04-29-2012, 03:53 PM   #5 (permalink)
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If a new filter and line cleared up the symptoms for 3 weeks and the same symptoms are returning I would suggest that the tank is possibly full of junk and the filter is again clogged. It's worth checking and never a bad idea to have a couple spares onboard anyway.

I have on more than one occasion had to go this route for older vehicles.

Tony
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Old 04-29-2012, 04:03 PM   #6 (permalink)
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Well I did put another filter in it...and still did it... But when I took filter off I heard a big gulp of air in the tank?
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Old 04-29-2012, 04:33 PM   #7 (permalink)
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Hello again if the new filter work for you for a 3 week and then the same problem again ,yes it will be your fuel tank that is rusty or with garbage on it ,i have the same problem with mine and my engine will run only like 10 minutes then the filter was completely clog so you will have to clean you r fuel tank (hard task )or replace the tank
please let us know if this was the problem
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Old 04-29-2012, 04:46 PM   #8 (permalink)
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It sounds like there was vacuum in the tank, the fuel pump struggles to overcome that vacuum resulting in symptoms consistent with fuel starvation, not unlike a blocked filter.

Excessive vacuum in the tank can usually be traced to a blocked charcoal canister or vented fuel cap that wont vent. Lack of venting creates a negative pressure in the tank as the volume of fuel in the tank drops.

Maybe just for the sake of troubleshooting, when the symptoms present themselves try loosening and re tighten the fuel cap to relieve the vacuum in the tank and see if that temporarily clears up the drivability symptoms. As you loosen the cap you might hear it suck air past the caps threads.

Have you had any fillups in the 3 weeks it was running correctly, how much fuel have you gone through?

Tony
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Old 04-29-2012, 04:59 PM   #9 (permalink)
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It did release air when opened the cap... When it was running good I was gettin about 22 25 mpg which I thought was ok... Also tried driving it after released cal and still was spit and sputtering bad but idling like a dream
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Old 04-29-2012, 05:20 PM   #10 (permalink)
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It still sounds like starvation, I really wish I could actually hear it. Another thing you might try for fun is going under and following all the fuel lines from the tank to the engine and making sure none are pinched, kinked or otherwise damaged.

Do you have a fuel pressure gauge you can use to measure fuel pressure going up to the carb?

If all else looks good I might start to suspect the carb, is it the factory OEM carb?

Tony
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