Hi I have a 1996 Nissan Altima i think I have a misfire I have poor take off at stop signs when the car warms up and sometimes it takes off normal I have ngk vpower plugs in them now done 7 months ago I also did wires rotor and cap fuel filter air filter and I also have a rough idle and vibration to the steering wheel I also changed the motor mounts and transmission mounts and that helped a little but still vibrating I tried putting fuel injector cleaner and didn’t make a changed so I’m guessing a misfire or pcv valve or iac can anyone help with this ? Thanks

SOURCE: Runs rough and vibrates when idling

make sure the firing order is ok, that means every plug wire belongs to a specific spark plug and can't be swap to another
if the do not help then reinstall the old distribuitor cap and see if that cures the problem i have seen some aftermarket caps arking internally
also doble check spark plug for loose and retie

SOURCE: how to replace a PCV valve on my 1997 dodge neon?

Once you have the new PCV valve locate the old one on your engine. It will sit on the middle of one of your valve covers (most likely passenger side) and will have a line that connects to the top of the valve. Simply pull the old one out and put the new one in snapping that line on the new one. Should only take about a minute to do. Hope this helps, let me know if it does.

SOURCE: 1996 Honda Accord Rough Idle Even After tune up

Perform a valve clearance inspection and adjust if necessary. Tight or sticking valves will cause a misfire or rough running concern. Note: Perform valve adjustment when the engine is stone cold. 4cyl: INT 0.26mm EXH: 0.30mm (V6 engine are hydraulic and no adjust necessary.) Also check for a sticking or stuck open EGR valve. For diagnostic purposes only: Remove the EGR valve. Place a business card over the EGR passage and bolt the EGR valve back on. This plugs the EGR ports and if the misfire goes away the EGR valve is partially stuck open and is defective.
Check for low fuel pressure. Check for low compression. Check cam timing. Check for a weak ignition coil. Also don't over look the possibility of worn or broken engine mounts which cause excessive engine movement and engine vibration. -hope this helps

SOURCE: 2003 cadillac deville rough idle with blinking ses

have the head gasket checked,pretty common on these

Bill Lewis

• 7 Answers
• Posted on Apr 28, 2012

SOURCE: car vibrates at idle.

Sounds like the Timing may have jumped a little bit...Check the timing!