So i friggin love my corolla, which i've named freedom. Its an all stock(at the moment) 1991 Seca Csi limited with the 4A-F engine(thats the carbureted one right?). I recently lost my job and so i have a lot of time on my hands, so i've been spending a lot of time on the car. I don't have a great deal of coin, so all i've done is replace the spark plugs, brake pads, leads, filters etc but now i want to start adding on rather than maintaining. I'm a bit a noob with cars but with all the problems my corolla had, i've started learning. My questions are:
What does Csi limited mean? What about it is limited? just curious....
Do more expensive spark plugs help? I just got the cheap ones coz i figure its just a spark which they have to make. can't be too much difference.
I went to my local repco and the guy said you can't put a pod filter on a carburetted engine. True? If so, are there any alternatives?
Is there the possibility that i could go to the wreckers and rip the EFI system out of a corolla there and replace the carbureter, or is it too much work? What would be involved?
When i put the engine in neutral and rev it i hear a pinging noise. What is it, how can i fix it?
You don't have to answer this one because its probably too broad, but what are the main causes of knocking noises coming from the engine bay? They aren't too loud, but they are there, especially when the engine is cold. I'd love to have the engine sound a little better.
Thanks for any replies i get.