Another thing My SC is always misfire under load and now I see the tach is sometime not working or falls down when this happens ?
http://www.sccoa.com/forums/showthre...ff+vacuum+line
Is it possibly this tube shown in this link?
KMT provided me with this.
Ok
Here it is boy´s.I change the cam sensor last night and tach stay at his place so thats ok but there is still some hick up´s in it under load ? I did not disconect the battery ? Do I need to do that to zero the computer or do I just go straight to change the spark plugs ( they are new ) . The ground straps are new and I put two extra there also.
PAlli
If it misfires only under heavy load, that sounds like it's probably a problem with the secondary ignition. To me, that sort of problem would show up as a heavy jerk when trying to accelerate under boost, but working fine at cruise.
It could be excessive plug gap, or a slightly cracked insulator, or a chafed or melted plug wire, or even a loose plug boot. I would check the plug boots first!