Revs dropping and Engine Shaking

[owen18]

Hey guys

Just recently i have noticed my VL will drop in revs to about 500 (not sure if thats normal or not) and the engine shakes a lil bit. I can also hear what i think is the revs dropping in and out through the exhaust, but the rev meter stays on 500 revs. Anyone have any idea.

I recently changed the oil and oil filter in the car, as well as the spark plugs, if this would have anything to do with it. Also i did overfill the oil a little bit, and i mean only about 3-4mm on the dipstick but spoke to a mate and he said it would be fine.

If anyone has any ideas or anything i could try to rule something out that would be great.

Thanks

Sam

 

[delcowizzid]

has it only happened after the plugs went in you might of got a dicky one in the batch of 6 whip em out and see if one is a different colour than the rest. could be other things too like the optical sensor in the dizzy or a dodgy spark plug lead.or airflow meter or blocked injector.start with the cheap easy stuff first.

 

[owen18]

Thanks Delco, i'll have a look
yeh well i only noticed it since i changed the plugs and stuff. i recently put a couple of bottles of fuel enjector cleaner in too, could it just be that working its way through?

 

[delcowizzid]

injector cleaner could of dislodged something in the system but ide be looking at the plugs first

 

[delcowizzid]

did you put the bottles of cleaner in seperate tanks of fuel and in with a good amount of fuel

 

[owen18]

ok thanks,
nah in one tank ( a mate of mine who seems to know a lil about cars told me too) and with a full tank of petrol

 

[delcowizzid]

thats a lot of injector cleaner for one tank LOL allways follow the instructions may go better when you get through the tank of fuel and fill back up

 

[owen18]

lol yeh well thats what i thought when he told me, hopefully it will do the car good though
my exhaust spits out a lot of black sh!t atm so thats why he said to do it

 

[owen18]

anyone else have any idea. havent checked plugs yet, anything else to look for except different colour

 

[detox_nath83]

check leads as well. AFM/ CAS/ Oxy sensor/ How is it when you rev it is it responsive or stuttery?