Okay, I got new plugs 41-950's. I plan to do the wires next weekend, but wanted to get new plugs going first. Now, I cannot find the gap for these. Not on the underhood sticker(s) and not in the manual. However, the manual lists the correct plugs as the AC 41-900's. :confused: I'm assuming the 41-950's are the replacements? So what is the correct gap? .050? Also, so you all use dielectric grease on your wire boots too? I have on all my vehicles, but haven't seen anything on this board regarding it. BTW, I have done searches on here but found nothing regarding my year vehicle. Thanks all! V.


I forgot: Is it easier to remove the plgs when warm/hot or cold? Thanks.

A/C 41-950's superceedes the 41-900's

Gap is .050

No grease. You'll notice the OEM wires are prelubed and there is a note on the box to indicate so.

Remove them cold and save your skin.

Thanks! I changed the plugs. Not bad at all. Anyone else cringe when remove plugs for the first time? I did. Luckily all was good. Normal wear, could of lasted the other 30000 miles. Decided to clean the throttle body; good Lord was it dirty!! The whole intake was filthy with oil sludge crud. Wondering why. Previous owner babied it too much? I sprayed quite a bit of throttle clear thru it, quickly assembled the air flow sensor and revved it pretty good. Hopefully cleaning a little bit of that crap out. Idles better now. Will replace wires tomorrow.



"Why the hell did I go through 15 vehicles before buying a Cadillac?? - idiot!!:helpless:
Thanks all for the great advice and help on this forum!! V.

The oily deposits you saw in the intake are normal. I gasped when I saw it for the first time as well. It is residue from the PCV gasses that settle when the engine is shut down. Cleaning it is a waste of time. What needs to be cleaned is the throttle plate and the TB bore. In particular, the mating surface where the plate meets the bore when in the closed (idle) position.

Thanks Ranger. I appreciate your help! V.

After the tune up and TB cleaning, you might want to disconnect the battery for about 60 seconds to clear out the learned values for idle, etc. Technically, it should pick up on the changes fairly quickly, but I feel reasonably confident that my car idled better after I did the disconnect. All it can hurt is clearing out your radio presets and resetting the clock. Might be worth a try.

I agree 100% with Ranger. Don't worry about the stuff inside the intake. It's normal and won't hurt anything. If it smells like gas, it could be a leaking FPR, but if you aren't having any hot restart problems, don't worry about it. Just drive it and enjoy.