*brain buster*
 

Whats goin on AZHT i need some help with a problem i got at the shop i work at we got a 2001 CRV in the other day and the customer stated the check engine light just came on and its running real rough so we scanned it with our SnapOn Modis (scanner) and there were 3 codes P0303, P0304 and P0300 all misfire codes so we checked the plugs and they were worn out so we did a full tune up on it (plugs wires cap and rotor) after the tune up we started it up and nothing changed still has the misfire and runs like crap we checked and pulled injectors, the distributor and and checked the valve lash cyl 3 & 4 were adjusted to spec and its still got a misfire with all 3 codes has anyone run into this before or know what else could be causing the mis??? HELP ALL:crazy:

try checking the map reading when the car is fully warmed up. should be no higher than .8v if it is any higher than that i would try adjusting the valves again,

see if the crank pattern is learned, if it is not then that will also give you misfire codes

^^ Or the valves have Burnt Because the valves were adjusted to tight. Do a leak down test on ecah cylinder.
You should know that buddy

Yes I woulds check compression on each cylinder and start from there I had a similar problem with a civic

forsure compression and cld test to start.

had a similar problem with my wife's 01 crv - apparantly a common problem is for the valves to tighten over time and then it will burn a valve