i was on the road today and i was shifting gear but then i didnt shift it right and it ****ed up my car. when i stop my car and put it on 1st like on a stop light the engine is rumbling which i can feel and the rpm is going down and up then when i go and i shift to 2nd gear my car feels like it tugs me for a second then when i go 3rd and just cruise it feel every bad. any thoughts on what the problem is and how to fix this problem?

 

So are you saying that you dropped a gear and bounced your engine into the 9000 rpm range? If you did that and your lucky, you may have only jumped a tooth or two on your timing belt. The other not so lucky scenario would be that you bent a few valves.

Checking the timing would be the easy thing to do first. If the timing checks out I would suggest doing a leak down test on all 4 cylinders.

 

at idle does the rpm go high then go low... high then low... high and low..?????? if so its the IAC valve "idle air control valve"....

 

basically yeah i dropped the gear and my engine bounced but i dont know about 9000 rpm, maybe because it sounded like it. ill give it tomorrow morning and if it still has a problem im gonna check my timing belt. ill update you

 

yeah it jumps like that.

 

Yup, the car can't be fine just a min ago and after shifting wrong it starts to drive weird. I assume its a bent valve if starts to drive shitty after shifting wrong.

 

its only when i drive 2 or 3rd gear if i go 4th or 5th its feel fine.

 

If your having issues when you are in gear and driving it's not the IAC valve.

Fingers crossed that you jumped a tooth on the timing

 

ok so i cranked up my car today seems alright it jumped very little at first but then after i drove it for couple of minutes it feels even worse.. im so sad i can smell like something is fked in the engine i checked my timing belt it seems like its in the right place. T.T NOOO!!!! i know its my engine probably a bent vavle you say??

how am i able to check the vavles and how much would it cost for the parts??

 

To check timing belt:
pull cover off side of cylinder head. Get cylinder no.1 to TDC. There should be 2 dots (DOHC four cyls are this way, not sure what you're running) and they should face each other.

To check compression:
Disable spark and fuel
pull fuel pump relay, let engine idle until it stalls out
pull coil wire, or ECM, or something that you're sure will disable spark- just pulling the wires you could get a jolt!

Pull the plugs (keep track where they came from and 'read' them while you're at it)
Have someone (or a clean screwdriver) hold throttle open.

Hook up compression tester (the hose threads in where the spark plug goes). Crank it over for 10 seconds, and record maximum pressure reading. Write this down.

Move onto the next cylinder, repeat the compression test, and when you're done they should not be more than 10% off from each other, and none should be really low (0). If they are, you have some problems.