Help!!!

[djvivisect]

I have a 91 eclipse 2.0 N/T
When it gets to 3000 RPMs it starts to run really bad shaking and things like that but stops at 4000 RPMs can anyone help me find out what it could be?

 

[AdamGTX]

mine did something similar turns out a vacum line was unhooked from the throttle body maybe it could be that?

 

[djvivisect]

I wish that was it but i checked that and they are all on

 

[StreetSleeper34]

Give us some more information...like if you are feeling the vibrations from the motor (missing, backfires, rpms flutter), or tranny (slips, grinds, etc...manual or auto), or is it from the chassis (tie rod, ball joint, bearings, cv joint, etc.). Does it happen during turning, acceleration/deceleration/cruising, warm/cold, all the time. Do you feel the shaking in the steering wheel, the pedals, or the whole car? Be as specific as possible. It is hard to diagnose with just vague discriptions of what is going on.

 

[djvivisect]

it comes from the moter like its running really hard.
it is in all gears at all speeds, acceleration & cruising. its not as bad when the car is cold but starts soon after i get about a mile or so down the street . i think its missing sometimes it will studder on takeoff but not always. the RPMs seem to be good.
if i gun the gas its like nothing is wrong but just driving is when it happens

 

[StreetSleeper34]

I'd start with giving it a full tune-up. Plugs, wires, air filter, fuel filter, tranny filter (if auto) PCV, new o2 sensor, belts. Also consider putting in a fuel system cleaner (Seafoam) and Restore into the crankcase to see if that helps if it is a fuel problem or an internal problem. If doing the basics doesn't work, then post again saying that it is still doing it.

 

[djvivisect]

i just gave it a full tune-up and nothing has changed

I'd start with giving it a full tune-up. Plugs, wires, air filter, fuel filter, tranny filter (if auto) PCV, new o2 sensor, belts. Also consider putting in a fuel system cleaner (Seafoam) and Restore into the crankcase to see if that helps if it is a fuel problem or an internal problem. If doing the basics doesn't work, then post again saying that it is still doing it.