first off, i drive a 97 maxima GLE with 84k miles. i have fixed a few problems with my car but there are still some that remain:

1. poor gas mileage, 15-19.
2. shaking when i hit 55 mph. doesnt go away if i speed up, only gets worse. (easily the worst problem with my car, it gets so bad that i cant go over 70)
3. rpm gauge not working. 1 out of 10 times it will work, but most of the time it just bounces up and down and does not gauge my rpms at all. just wondering if this is an easy fix.

i will take any advice, thank you.

 

Any code?

 

It would be nice to know if you have any codes.

1 - Spark plugs could be worn out, knock sensor could be bad.
2 - Shaking could be a bent wheel. Rotate your tires and see if the symptoms seem different.
3 - Probably a bad tachometer. Get a gauge cluster from the junk yard. They're not all that hard to change.

 

sorry i didnt post that i have no codes, no CEL. just replaced my knock sensor a month ago because i had a code.
and replacing my gauge cluster wont mess up my mileage or anything else?

 

2. Wheels balanced? If so, I would say basically all the suspension parts: tie rods, ball joints, control arm bushings, ect...

 

In my experience and judging by what you say, any problem that increases with speed (not rpm) involves the wheels... most often this is simple misalignment or misbalanced tires, but could also(rarer) be an axel issue...

most places will do these checks and balancing for next to nothing...

 

i had the same shaking after i got new tire on the front, turns out they didnt balance them right, got them balanced and all is well now. the cluster in these cars comes apart real easy just swap in a new tach

 

could jus be worn tires

 

i cant post a new thread or i would + im new at this site but i got a tb with a tps on it from a u-pull it and it solved the problem but i have a few more problems its throwing 3 codes p1445,p0300 not the maf changed and not the problem, and p0731