Dank_Mochi

Gotcha, all of what you just stated was true for me. Arm was working and being pushed down, I'm taking the carb back to where i got it rebuilt and will have those guys figure it out. I'll post some pics of my truck soon when it's running again. Thanks for all of the help

Fuel pump seems to be working just fine. float bowl is about a little less or close to 3/4 full. If theres plenty of fuel in the bowl would this mean there is a linkage problem with accelerator pump?

Checked the plugs and the gaps too. They're good

Not getting any fuel squirting from accelerator pump so I'm gonna pull off the carb and see if cleaning out the primary jet and pump will help. I also noticed that the secondary throttle plate was closed and stayed closed when throttled. Does this sound right? Does it open up at specific rpm?

Right on, Thanks for the suggestions. Cheers

haha damn, i have been seeing that a lot of people on here are all recommending the weber. will a 32/36 bolt right onto the stock manifold for an L16? Might just have to get rid of the hitachi sick of the headache im having trying to figure it out, i just want to drive

Alright so you guys were right I was wrong. Checked the spark plugs and its telling me carb is running rich, the plugs were dark brown. So what would be my next step here? I checked the fuel filter to see if it was dirty, looks good to me. so what would you guys suggest I do next? I completely stumped and don't know enough but any suggestions will help

Someone who worked on the truck for me prior to this happening had said it seemed to be running lean. I know very little about carbs. He told me the aftermarket header was pushing way more air than the stock header and said could possibly need to size up the primary jet because of that. If you guys have any solutions or ideas thank you. Would love to find another stock header for an L16 just havent had any luck searching for the past few weeks. stock header back on it would probably solve my problem

hey guys, I have a 1971 521. This is the first ever car i have taken apart and put together. Had the engine rebuilt, replaced a lot of parts as well. One thing i didn't keep in mind when building was selling the stock exhaust header and replacing it with an aftermarket one i bought from Datsun Parts in Rancho Cucamonga. I have the stock Hitachi carburetor also had that rebuilt. Truck is running pretty lean now, had someone tell me to drill out the main jet in the carb one size bigger to compensate for the extra air flow? Any advice would help, I broke down the other day just started to bog out. Afterwards could turn the truck back on but as soon as i hit the gas it would just bog and shut down. Thanks for the help

okay ill try that out thank you. And no. horn does not work. The wire that leads up to steering wheel is cut from previous owner.

Are there any 521 people in the orange county area that would be willing to let me check out their engine bay to see how everything is hooked up. i just rebuilt a L16 motor put in back in and plugged everything back in on the harness and I'm having a short. all grounds seem to be good. When i plug in my battery and put the negative cable on i can hear a "click" coming from one of my relays (closest to the firewall) out of the 3 on the left side. When i unplug that relay the clicking noise goes over to a switch thats on the firewall right underneath the accelerator cable and it leads up to the carb solenoid. Any help or advice would be greatly appreciated! i don't know very much about electrical stuff so this is becoming a major headache. Thanks