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Discussion Starter #1
My 1990 samurai (converted to carburetor) does fine in city driving, having 100 percent of it's power. Once I go on the highway, like clockwork after around 3 miles, it starts to sputter and lose power considerably. If let it idle for a while on the side of the road, it works fine again. This keeps happening and happening consistently.

I've talked to mechanics, researched on here, and cannot seem to find an answer.

Has anyone experienced this, or possibly know what it could be?

Thanks!
 

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Sounds like fuel starvation...

converted to carburetor
And your problems started right after the change? :huh:

Clogged fuel filter, insufficient fuel pump delivery or a restriction in the fuel line / system. ;)

Fill in your location and indicate which engine / valve combo you have too.

Any codes on a diagnostic pull?

What sensors did you add, bypass or otherwise reconfigure?

What carb?

How did you accomplish the plumbing mods?

What are the "mechanics" TELLING you?

We're good, but don't have a crystal ball.
 

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Discussion Starter #3
samurai loses power on highway

And your problems started right after the change? :huh:
No, sorry. I just bought it, and this was an problem that came along with the car. The previous owner said nothing about it.

Clogged fuel filter, insufficient fuel pump delivery or a restriction in the fuel line / system. ;)
The mechanic said possibly a clogged fuel filter. They said look on the internet to find out. (This is the same mechanic shop that couldn't figure out the wiggle in my steering was a bad stabilizer.)

Fill in your location and indicate which engine / valve combo you have too.
Sorry, I am in Pittsburgh, PA. And it's all stock. (so I was told

Any codes on a diagnostic pull?
He did not run a diagnostic. But I'll ask another mechanic to do one.

What sensors did you add, bypass or otherwise reconfigure?
Absolutely no idea

What carb?
I was told it was a stock carb off an older samurai

How did you accomplish the plumbing mods?
Again, no idea. Wasn't me.

What are the "mechanics" TELLING you?
"I don't know, kid. Check on the internet or something.

We're good, but don't have a crystal ball.
I understand, and appreciate the point in the right direction. I'll look into all the things you said. Thank you for the help.
 

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Discussion Starter #6
I ordered one. Hopefully that should fix the problem...

I had to do all this in fixing my steering. The mechanic shrugged it off, saying "maybe you need to rebuild the knuckle." So I did that, and nothing. A whole rebuilt front end later, I realized it was the steering stabilizer that fixed it. (everything did sort of need replaced, so not a total loss.)

So off to the races! Let's see how many new parts it takes to fix it this time.
 

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Discussion Starter #7
Still have the problem..

So, I think I have more than one problem. One day, my car just stopped working at all. I realized the fuel filters were both shot.. and I have rust in the tank. When I swapped out the fuel lines, and filters, the filters weren't doing anything. The gas was a brownish color. After replacing all that, and getting clean fuel to the engine, I thought that would fix it.

It didn't. Now, I am thinking it might be an overheating issue. I was able to drive steadily for 20 miles last week at night when it was cold out. But during the day, I can barely do 3. On a very hot day, I am not even able to make it up my street without it stalling. The other day, there was a crack in the resevoir, and it basically exploded.

I took out the t-stat. No luck.

Any other ideas?
 

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if you have a clutch fan repack the clutch wit rtv silicone if you have a electric fan make sure it turns on when suppose too or stay on. put back a new thermostat. if you had rusty water in the radiator flush and refill with coolant ebay.com got the resorvs for cheap even oem. go to the local auto parts store and buy a haynes or chilton manual it covers both carbs and efi for 86-95 samurais pretty helpful but not all the time.
 
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