balu

Got a 2003 max manual trans 190k. the engine shakes at idle and while driving. Got it for cheap in this condition figured i can fix it. Checked maf,plugs, coils,injectors, serpentine belts, ecm, compression, Cam sensors, throttle body, vvt solenoids, Motor mounts, and everything checked good. It feels like something is out of balance. Im out of ideas. Could a out of balance fly wheel or clutch cause this? I would check the timing but not so sure how to. I have ndsII and it shows timing at 13 to 15 degrees.

chrome91

iTrader: (1)

any codes in the system?

balu

had a p0018 cor the crankshaft position sensor cleared it a few days ago and no codes till now

DennisMik

iTrader: (2)

I would think that an out of balance flywheel or clutch would make make the vibrations get worse as the rpm's increased.

When the car is idling, unplug either the coil or the fuel injector on each cylinder (one cylinder at a time) and see if the idle gets worse. If it doesn't, then you have found the problem cylinder and can focus on it. You can swap ignition coils, check the ohms of the fuel injector and maybe listen to the injector with a stethoscope.

balu

Thanks for the reply. I checked all coils one by one. Even bought 2 oem coils to make sure. Checked injectors as well. I pulled each injector to test pulse and spray pattern all is good. Checked and cleaned all the ground connections I knew off. Any help is appreciated.

nestorlugo

iTrader: (11)

Subscribed!



This is the worst case senario.

or just george_ trolling.....

balu

When I hook up the ndsii to the ecm it shows idle speed at 650 rpm and the speed is stable but engine keeps shaking.

nestorlugo

iTrader: (11)

Did you or someone else check the engine mounts?

balu

The mounts are not in the greatest condition but they are functional.

nestorlugo

iTrader: (11)

Flywheel , clutch

george__

iTrader: (1)

maxiiiboy

That's not good enough. Replace your engine mounts - preferably all four, unless you can determine which one(s) is bad. You can get all from a reputable site such as RockAuto.com for about $150.

(How do I know? - I had a very annoying clunking problem and my mechanic was telling me my mounts were OK. To make along story short - he was wrong, and the people on this forum who advised me to replace the mounts were right. This story seems to repeat itself quite often ..... ).

balu

I will order the mounts tomorrow and if that doesn't fix it im planning on dropping the trans to check flywheel n clutch.

george__

iTrader: (1)

Consider getting Energy Suspension mounts for front/rear... Polyurethane so way stiffer and sell the front/rear here or wherever.

balu

Ok so I used a metal bar to pry on the trans mount while the engine was running and the shaking literally stopped so Im thinking the problem may be the mounts indeed. Will update after I replace the mounts.

balu

Replaced mounts and the vibration is still there not as strong but present. Whats next?

DennisMik

iTrader: (2)

You have at least one cylinder that is not creating as much power as the others. Find out which one by unplugging the ignition coils one at a time while the engine is idling. When you unplug a coil and the idle does not get any worse, you have found the cylinder that is not working properly.

Then you need to re-check the ignition coil, the fuel injector or compression for that cylinder.