Bucking under a load

Raymondo

Registered User
After putting the engine back in my son's '93 SC it is bucking under a load. It idles fine. Any suggestions?

Thanks!
 
Do a search for this one and you'll see it's been discussed many times. Usually this is due to a plug or wire, maybe your DIS or even the cam sensor or crank sensor. Best of luck
 
The bucking issue with mine after installing the new motor was a cracked spark plug.
 
I also had a cracked sparkplug. By the time I figured that out I had also ruined the new wires that I had just put on. Basically had to change everything again. If it idles fine and you can baby it around just fine then my money is on wires and plugs.
 
Thanks guys. It has factory ignition. I will check wires and plugs. I will also double-check all the vac lines.

Raymond
 
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