Spark Plug Question?

[CG77VETTE]

Last year I installed Bosch Platinum +4's in my early '86 iron head L98. I recently developed a rough idle condition. I have not had a chance to pull a few plugs to inspect them, but has anyone else had any similar problems with the +4's? Thanks in advance for any input.

[vincec5]

How much mileage is on the wires? Do you drive the car a lot or is it stored? I think your year had injectors. The injectors could be dirty.:banghead:

[fatherlarry]

Good answer Vince.

CG77Vette,

I'm also going to copy your post to the Corvette Tech Section so Corvette Kotze, our technician can address it for you.