Cap and Rotor

[Bravada 97]

Hi guys I have a question. I did a tune up on my 97 Bravada last fall. At the time it had 68K miles on it. I replaced the plugs, fuel line filter, PCV, and put in a K&N air filter and cleaned the MAF sensor.

My truck now has 75K and as of late I noticed it seems a little sluggish, not too bad but a little hesitant when accelerating. I am wondering if I should replace the cap and rotor? I did not replace that during the tune up.

Is there something else that could be causing the sluggish response? I am currently getting about 19-20mpg on the highway and 15.5mpg in town.

Thanks for any help as it is greatly appreciated.

[jackass#1]

i would replace the cap, rotor, and plug wires. there are alot of things that could cause this. but this would be the most obvious of all. also check fuel pressure and check vaccum lines for leaks.
i dont know much about k&n filters but how often do they need cleaning?

[SComp23]

They need to be cleaned about 50k miles

[OverBoardProject]

Air Cleaners vary on how dusty is is where you drive, and a few other factors can be worked in as well.

I would start with the cap and router, plus pull and check your plugs. Most people on this board say that origional plugs are the only ones that'll work right.

[Bravada 97]

Thanks for the info guys. I appreciate it. I will be changing the cap and rotor very soon.

When I did my tune up I used Autolite platinun plugs from Autozone. They seem to be working fine so far. Are these a bad choice?

[SComp23]

Yes, indeed it was a bad choice. Take them back and ask for AC Delco Plats. The Autolites don't have the heat range our trucks need in a plug

[magnum3456]

Originally Posted by SComp23

Yes, indeed it was a bad choice. Take them back and ask for AC Delco Plats. The Autolites don't have the heat range our trucks need in a plug

What about Bosch Platinum 2's? are they alright?

[SComp23]

No, our trucks do not respond well the Bosch plugs. They do not have the same heat range of the Delco's. We need plugs within a very high heat range, and Delco has been the best to provide that range.

[jackass#1]

ac is the best plug for the money. bosch and champion dont do well even if platinum or gold. dont forget to change your plug wires as well.

[muzzy1maniac]

Originally Posted by Bravada 97

Thanks for the info guys. I appreciate it. I will be changing the cap and rotor very soon.

When I did my tune up I used Autolite platinun plugs from Autozone. They seem to be working fine so far. Are these a bad choice?

I think you answered your own question. They aren't doing ok for you since you're complaining about your trucks performance. Stick with AC Delco's it's worth it in the long run.

[Cloud Strife]

What are you referring to when you mean "heat range" ?

[SComp23]

Spark plugs have a specific heat range that they are specifically built to operate in. The other plugs do not stand up to this specification in our vehicles.

[ZL1power69]

ac delco plats are gm replacement parts and are the best for our engines. yea they are a bit pricey but are worth it if u want long term realiability.

[Booch]

Hate to break it to you, but Autolite, 50% of AC Delco, and SplitFire are all made at the Honeywell plant in Fostoria, Ohio.

Not a lot of difference other than the brand and the number of 'ribs' on the ceramic insulator.

[dmbrisket 51]

ac delco.! lets take what booch said here in post number 14 for a second, yes they are made at the same plant, but, my buddie makes cheese, and at this same plant they make pepper jack, american, swiss and about a dozen other types, no 2 cheeses taste the same, no two plugs are created equil, you do what you want with your vehicals, but our blazers call for, work best, and last longest on ac delco platnum plugs, bottum line, every thing else is pure shit, including bosh 4, champion, autolite (ford plug) and any other redaly available plug... tommy boy says it best 'you can get a good look at a T bone by sticking your head up the bulls ass, but wouldnt you rather take the butchers word on it?'