Hey guys. I have a 1993 Nissan Sunny (Power Package). My car's engine started misfiring few months back and when I showed it to a mechanic, he said the carburate needs to be cleaned and repaired. So last week I bought a carburetor repair kit and gave the mechanic to repair it (We were under strict curfew for few months because of Covid 19) and he did. So after the repair, we went a trial run and there was no misfire during that time. So I paid the mechanic and went home. When I was on my way to home, it started misfiring again. I was busy the next few days (I work from home, So I didn't use my car during that time). Anyway, I took the car to the same mechanic after few days and after checking he said spark plugs and wires that runs from the distributer to the plugs needs to be replaced. So I bought those and he replaced those as well. But when we did the trial run, the misfiring did not go away. Then he said the car's distributer needs to be replaced?
What are your ideas about this? Will this problem go away if I replaced the distributer? I am tired replacing random parts without knowing what exactly causes the problem.... Thank you! 🙂
Well if he checked for spark initially he might of determined that the distributor night of been weak. I think you should tell him to install the distributor labor free. If the misfire goes away after that it will tell you one thing, he was guessing from the very beginning.
Find another mechanic.
A carburetor can be mechanically/manually tuned in two different ways:
1.) Lean (low fuel/high air) - good MPG, low power
2.) Rich (high fuel/low air) - good power, low MPG
A common issue (one that I've encountered myself) is people tuning their carburetors TOO lean, which frequently causes backfires, especially when the engine is cold. Even though our goal is to maximize MPG, we have to sacrifice a little bit to keep our engine from backfiring and causing further harm. Tuning your carburetor is super easy and there are hundreds of YouTube tutorials on how to do it. Try tuning your carb to provide more fuel to the engine and see if that fixes your problem. Hope this helps!
If you replace enough parts you will eventually fix the problem. {black}:laughingoutloud:
Have your mechanic check;
For vacuum leaks.
Compression check, cranking and running.
Check valve adjustment, if adjustable valves.
If you replace enough parts you will eventually fix the problem. {black}:laughingoutloud:
Have your mechanic check;
For vacuum leaks.
Compression check, cranking and running.
Check valve adjustment, if adjustable valves.
An after thought. Is a lean surge being misinterpreted as a missfire?
When the problem occurs, try adding propane into the intake, I use a bottle of propane and a regulator to control the amount of propane I add, and see if the problem goes away.