I have a 97 disco 4.0... have a vibration on start up hot or cold sounds like a miss? there's always a shake at all rpms not real bad but its there did a tune up plugs wires have plenty of power a little lost here was wondering if any one else has had this type of problem Is there any thing an look for? obd doesn't find any codes cats have been deleted besides that all stock

 

have you checked the motor mounts ?

 

Whats the best way to check them ? Is it a common thing to fail it does have 142k on it

 

listen to the exhaust. a miss or dead cylinder will sound like a lame fart, kind of a puffing sound every time the cylinder hits. pull the plug wires one at a time and the one that has no effect is the dead cylinder. check plug, wire, injector, compression

 

put a block of wood under the oil pan and use a floor jack to slowly attempt to raise the motor......if the mounts are bad you'll know right away as they will separate with only a little effort

 

So was it there before the tune up? Could be defect plug or wire, coil going bad? Mine has a slight miss at idle most people would not notice but been 2 years since a tune up

 

if it smells like .... it's usually .... and if it feels like a skip, it's usually a skip

 

Yes this on mine

 

The miss was there before the tune up plugs and wires didn't help it all .The old plugs looked good or should I say looked the same its never over heated or anything like that could it be a fuel pressure problem just in the last week it's starting harder it act like theres no fuel leave the key on for 10 sec then try it starts right up wondering if low pressure could cause this and what to look for ill check the mounts tomorrow after work and see what those look like can't keep throwing money at it wife will kill me .....she even said I should just sell it.... but shes crazy !!!

 

crank sensor?