socaldatsun Posted December 27, 2011 Report Share Posted December 27, 2011 So today my family decided to head up to julian. From where I live to the mountain town its about 70 miles up and around twisty mountain roads, thought it would be a perfect time to take out my truck PLUS it was nice and sunny in san diego. The truck made it up the mountain like a champ but once i got about 10 miles from the town i just felt my gas pedal drop below my foot to the ground and i hear my RPM go high and higher. I got to a T-section and when i go to step on my pedal their was just a loud scream of the motor. I tried to signal my brother and my parents that where in their own cars that i have a problem and to pull over. I pop the hood and right away see that the throttle was really lose but did not know why. My dad points out that their is no throttle spring attached. I really didnt want to leave my datsun in the middle of nowhere on the side of the road so my parents agreed to go infront of me and my brother behind and to go SLOW! we made it to the town and luckly their is a napa autoparts store in the little town but no springs :/ the guy pointed me to a hardware store that might have some springs in stock so i head over and pick something out that i thought would fit. get back to the truck and find the spring broken on one end and it was really rusty. heres some pictures, enjoy :) Everything was fine and dandy playing in the snow lol BAM! it happen at the T-section The damage Their is also some prety bad wear on the throttle arm and its almost all the way though, Ill take some pictures tomorrow Quote Link to comment
Uber Deaf One Posted December 27, 2011 Report Share Posted December 27, 2011 That could have been nasty.. glad it ended well. Diggin your truck! How were you able to get the black plates on a '71? Quote Link to comment
wayno Posted December 27, 2011 Report Share Posted December 27, 2011 After 40 years things start to break/not function correctly, you will get used to it, and learn to repair on site, the 521 has a sping on the clutch slave that can be used in a pinch, there are also 2 springs holding the e-brake cables up back by the rear wheels. Quote Link to comment
Lee R Posted December 27, 2011 Report Share Posted December 27, 2011 That could have been nasty.. glad it ended well. Diggin your truck! How were you able to get the black plates on a '71? Looks like it was painted as that number series was originally used for blue plates. Quote Link to comment
socaldatsun Posted December 27, 2011 Author Report Share Posted December 27, 2011 Looks like it was painted as that number series was originally used for blue plates. correct. came with those plates Quote Link to comment
Uber Deaf One Posted December 27, 2011 Report Share Posted December 27, 2011 Looks like it was painted as that number series was originally used for blue plates. Sweet thanks. I was bummed out when I found out I could go to blue plates but not black plates... Quote Link to comment
DanielC Posted December 27, 2011 Report Share Posted December 27, 2011 I have had the throttle spring break on 521 trucks also. It happens. I also took the arm that holds the top end of the spring off the carb, and put a little weld bead where the spring wore a groove in the arm. The stock 521 carb also has a second spring on the secondary. This spring will close the secondary side of the carb, and close the primary to about 60% open. If you have not changed your brakes to using a power brake booster, you only need the engine to run, to make the truck go. The truck will steer, and brake, just like normal, in neutral with the engine shut off. You just cannot accelerate, or hold a steady speed. Quote Link to comment
socaldatsun Posted December 28, 2011 Author Report Share Posted December 28, 2011 more pics Quote Link to comment
skyblue Posted December 29, 2011 Report Share Posted December 29, 2011 Damn scary shit. Glad to hear nothing too bad happened. Quote Link to comment
nismo dr Posted December 30, 2011 Report Share Posted December 30, 2011 Napa had no springs, that has to be the worst parts store ever, fuck the worst stocked po dunk mom and pop places have those HELP! brand spring packs Quote Link to comment
DanielC Posted December 30, 2011 Report Share Posted December 30, 2011 Ace hardware has a very good selection of springs. Quote Link to comment
josh817 Posted January 2, 2012 Report Share Posted January 2, 2012 I have a habit of keeping a big coffee can filled with hardware that I have collected from Datsun motors and stuff. Nuts, bolts, springs, hose clamps. Keep it behind your seat. One thing I noticed, granted I have the Weber DGV, but chugging up a hill with only the throttle plate springs (which aren't very strong) the throttle would stick open until the hill was scaled. I don't know if it was something due to the motor being under rigorous load so it's drawing in lots of air through the cracked throttle plates, thus they won't close... That is certainly one thing I HATE able cable setups. I refuse to use them if I don't have to. This way you can pop the pedal with your toe if needed. Quote Link to comment
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