: plugs and wires



hogstamogsta
12-25-05, 07:55 PM
i have a 96 deville and it is not getting good gas mileage, im getting about 16-18 around town, it has 145000 miles on it, not sure if the plugs or wires have ever been changed, i have a new k&n air filter on it, didnt seem to help any, should i change the plugs n wires n hope to get better gas mileage, or what can i do to get better gas mileage?

Ranger
12-25-05, 09:03 PM
Check your FPR. That is a comon cause of poor milage. Plugs and wires are more likely to cause a misfire if bad. That said, at 145K it may be time.

Put the paper filter back on. It will filter more dirt.

hogstamogsta
12-25-05, 09:55 PM
how do i go about checking that? where is it located

Ranger
12-25-05, 10:12 PM
http://www.cadillacforums.com/forums/showthread.php?t=46417

davesdeville
12-26-05, 02:27 AM
16-18 isn't too bad actually, for a 2 ton car that has in the neighborhood of 300hp. Keep your foot out of it.

hogstamogsta
12-26-05, 09:23 PM
i didnt check it yet, but i called the dealer today and they said that i had a a recall on the fuel rail, i have to go in there tomorrow mornin to have them change it, does anyone know if they replace the fpr too? :confused:

eldorado1
12-26-05, 09:40 PM
they do not.

hwelchwa
12-26-05, 10:38 PM
You probably will need new plug wires after they do the recall service. My 1996 had 60K when they did the service and it came out with a low rpm miss. New plug wires fixed it. I have seen at least on other post with the same problem.

hogstamogsta
12-26-05, 10:45 PM
did it improve ur gas mileage?

Ranger
12-26-05, 11:22 PM
A misfire because of failed wires is VERY common. Been there, done that.

hogstamogsta
12-27-05, 12:10 PM
i havent had a misfire yet luckily

Ranger
12-27-05, 05:32 PM
I was refering to after the fuel rail recall. Be prepared for it.

hogstamogsta
12-27-05, 10:51 PM
yeah true im ready for it, do i have to get oem delco wires? or will some just autozone brand ones work?

Ranger
12-27-05, 11:21 PM
General concensus is stick with OEM.

powerglide
12-28-05, 01:25 AM
:yeah: