possible fuel return line swapped with fuel sending line

[twisted_pathy88]

Hey,

I've got a 1988 nissan pathfinder with a 2.4L carby engine (z24). About a month a go when I got it back from my mechanic

it started "bucking" and "jerking" like its starving for fuel when I'm going up any sort of incline. Today when I looking in my engine bay I saw that the fuel return line is connected to the fuel filter and the fuel sending line is connected to the line that the return line is supposed to be connected to (which is incorrect according to my service manual). I'm not sure if it was like this before I sent it to him. Anyway my question is, is there any tests I can perform to find out if they have been swapped around?

Also the person that owned the car before me installed an aftermarket fuel tank and also relocated the fuel tank so I'm not sure if he swapped the fuel lines at the tank or not

 

 

 

Looking forward to any suggestions.

 

 

Twisted_pathy88

 

[Kingman]

Swap them and see if it runs any different.

 

Carb or TBI? The Hitatchi carbs have vacuum secondaries that are known to fail, and the electronic feed back ones are pretty finicky sometimes.

[twisted_pathy88]

Its a carb but I swapped the Hitachi for a Weber. If I swap them it shouldn't cause much damage if I only run it for 10 minutes or so

[adamzan]

I would say just switch it and see what happens.

[Kingman]

I assume you've got the jetting correct?

[twisted_pathy88]

Yeah the jets are correct. Took it to a carby specialist to make sure. If the lines have been swapped around would there be less fuel pressure getting to the carby?