my gas mileage for my 92 se is horrible!!! anywho....i was wondering if somebody can give me a list of things i need to fix/replace to improve my mileage
also whenever im in 4th or 5th my car starts to shake at about 4000 rpm's.....i have no clue why it does this...any ideas on what it could be would be much appreciated

noah

 

try a tune up...
some stuff to check/replace: fuel filter, air filter, spark plugs, spark plug wires, cleaning of the throttle body, oxygen sensor, exhaust leaks.

there are some recent posts regarding gas milage that people posted recently. might wanna check those out too

 

i just did a tune up bout a week ago...i also have the PR CAI and RT HF cat convertor waiting to be installed....besides normal tune up stuff is there anything else i can do??

 

Try advancing your timing a bit, I did it and my mileage went up about 10% on my 92 SE. Also make sure that you don't have any exhaust leaks, broken exhaust studs or bad O2 sensor.