307 rattles when cutting off!!!!!! Help!!!!!

[lilmike4200]

I have a 87 Cutlass Supreme 105,000 miles original motor. what does it mean when your engine rattles like it's struggling to cut off?

[88hurstolds]

It's called dieseling which means excess fuel is draining into the cylinders due to the carb leaking fuel (needs a rebuild) and then being ignited by the excess cylinder heat due to running way to hot. I believe it can also be caused by poor cylinder pressure.