Generally the Bonnie runs great and accelerates very smoothly. However, for no reason it sometimes starts misfiring while I am driving at a steady spead or accelerating up a hill. Then the problem will clear and it is ok again for a while

Any thoughts on what I should check? :?:

downshift once does it get better?

Do you think it may be the spark plugs?

mine still misfires too new ac delco plugs and wiresnt arent a year old yet. someday ill find my misfire but it only does it going up hills

The most likely cause is a bad plug/wire/coil. You need to put your year and model in your sig, and tell us if you're still running the stock wires, and how many miles on them.

It is a 1995 Bonneville SLE with 107,000 miles. I am the original owner and the plugs were changed at 60,000. The wires, coils etc are orginal

Thanks

You're due for plugs and wires. Do those before wasting any money on anything else. I'd also suggest a fuel filter, air filter, and pcv valve at the same time. There'* a coil pack troubleshooting procedure in Techinfo.

But do the plugs and wires. They're due/overdue.