Help!! Engine Miss

randy wilson · 01-25-2012, 10:40 AM

Look at the ground, it will be the problem. You may have to ground it in several places, and also, put a timing light on the motor in the car, rev it up to peak, and see if the timing moves. If it does, it is a ground.

FED 387 · 01-25-2012, 12:41 PM

timing on a engine with a chain drive will tend to retard as the engine increases in rpm and advance when the rpm decreases if you time it by reving it up its the chain stretching ever so slightly or taking up the slack that causes this movement---try timing it at a steady rpm of say 5000 rpm see what it does if its moving around or not---I'm gonna bet tht you have a bad wire somewhere either broken or bad connector maybe even a bad sparkplug try swapping out plugs one at a time see if it helps I've seen bad ones from the factory not often but it does happen---works and then kinda works depending on the load and other things---- -- maybe go so far as to take the engine back out of the car and run it on the dyno again see if the problem persists or goes away---if it persists its the engine if it goes away its some thing in the car---if its in the car then you'll hafta start looking at the entire electricla/ignition system----Comp

01-25-2012, 10:40 AM	#1
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 22 Times in 22 Posts	Re: Help!! Engine Miss Look at the ground, it will be the problem. You may have to ground it in several places, and also, put a timing light on the motor in the car, rev it up to peak, and see if the timing moves. If it does, it is a ground. __________________ don,t have one

01-25-2012, 12:41 PM	#2
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,422 Likes: 532 Liked 333 Times in 180 Posts	Re: Help!! Engine Miss timing on a engine with a chain drive will tend to retard as the engine increases in rpm and advance when the rpm decreases if you time it by reving it up its the chain stretching ever so slightly or taking up the slack that causes this movement---try timing it at a steady rpm of say 5000 rpm see what it does if its moving around or not---I'm gonna bet tht you have a bad wire somewhere either broken or bad connector maybe even a bad sparkplug try swapping out plugs one at a time see if it helps I've seen bad ones from the factory not often but it does happen---works and then kinda works depending on the load and other things---- -- maybe go so far as to take the engine back out of the car and run it on the dyno again see if the problem persists or goes away---if it persists its the engine if it goes away its some thing in the car---if its in the car then you'll hafta start looking at the entire electricla/ignition system----Comp