Jump to content
CaddyInfo Cadillac Forum

oo deville northstar... spark plugs


lowsixfo64

Recommended Posts


pay the 4.00 use the delco ive never had any success with bosch plugs tried them in my corvette had to change them right out never a problem with delco in gm products

Link to comment
Share on other sites

I have 143,000 mile spark plugs in my 143,000 mile engine in my 143,000 mile Seville. I do plan on replacing them soon, because there's a slightly variability when you barely crack the throttle open when the engine is cold...and I'm sure it's because the spark plugs are close to 150,000 miles old. Nonetheless, they're good for AT LEAST 100,000 miles. How many miles are on your 2000 Deville?

Jason(2001 STS, White Diamond)

"When you turn your car on...does it return the favor?"

Link to comment
Share on other sites

for plugs for my 00 deville i figured that ac delco would be best. they are actually 4.00 more than a bosch platinum. are they all the same? which plugs should i buy?

Not to talk you out of changing the plugs or anything...but....the plugs in that engine should be good for life practically.... Have you pulled them and looked at them or just planning to replace for maintenance. With the platinum tips and the coil at plug ignition and the onboard misfire detection I would just leave it alone. If the engine starts to misfire due to a plug or ???? the SES light will come on to tell you. Replacing the plugs on that engine is hardly ever necessary and I would just leave them alone unless you have some pressing reason to change them.

If you do change them use the OEM plugs. They are matched to the coil at plug ignition. The Bosch platinums and especially the Bosch Platinum +4 plugs have proven to be inferior in that application.

This is the only thing I would have to disagree with you on Guru...

I think we had this discussion before but I'm not sure that it was you I was arguing with... :lol:

My experience with the Bosch +4s has been a 96 Corvette, 94 ESC, and 98 Chevy Cavalier 2.2L... All 3 ran perfect and over 20K miles on the +4s

On the other hand, every one of those cars, and my 98 ETC experienced loss of the platinum puck, opening up the gap on the stock plugs... I used the +2s instead of the more expensive +4s on the 98...

I know it's viewed as a gimmick, but I've always had good luck with Bosch platinum on cars that were driven hard... The only time I had problems was on an older car that my GM mechanic told me, "stop driving it like a granny"... :lol: I started driving that car harder and the problem went away...

The thing that drew me to the +4s and +2s has been the open design and multiple spark paths... Now I've never had the heads off my NS but it appears the plug is centered in the head... I would think that the unshrouded spark would be better for combustion... Unless I'm misunderstanding, wasn't that the reason the old drag racers used to cut back electrodes and index plugs???

Jim

Link to comment
Share on other sites

I dunno....why would you want to put 20000 mile plugs in when you get 100000 on oem plugs.....I'll stick to the book..

I think its a crap shoot personally. I put Bosch in an 86 Corvette and it would not idle, put the AC's in and it was perfect..

I have always seen GM products run mediocre on aftermarket plugs. Even within AC when I was a kid we used to use R46S instead of R44 as it was a hotter plug and they seemed to last longer and seemed to make the engine more responsive, I always used S which was the longer tip... I believe that the aftermarket plugs can create heat range types of problems. What concerns me the most however is that the AC plugs are specifically designed not to cease in the head, and their shells are impregnated with a material to stop the boot from sticking, I wonder if aftermarket plugs pay attention to those things?

To each his own I guess. I guess this is why LINIX, Word Perfect and Apple exist.

Early on sailors navigated by the stars at night and the North star became the symbol for finding ones way home. Once you know where the Northstar is you can point your ship in the right direction to get home. So the star became a symbol for finding ones way home or more symbolically even finding ones path in life.

Link to comment
Share on other sites

for plugs for my 00 deville i figured that ac delco would be best. they are actually 4.00 more than a bosch platinum. are they all the same? which plugs should i buy?

Not to talk you out of changing the plugs or anything...but....the plugs in that engine should be good for life practically.... Have you pulled them and looked at them or just planning to replace for maintenance. With the platinum tips and the coil at plug ignition and the onboard misfire detection I would just leave it alone. If the engine starts to misfire due to a plug or ???? the SES light will come on to tell you. Replacing the plugs on that engine is hardly ever necessary and I would just leave them alone unless you have some pressing reason to change them.

If you do change them use the OEM plugs. They are matched to the coil at plug ignition. The Bosch platinums and especially the Bosch Platinum +4 plugs have proven to be inferior in that application.

This is the only thing I would have to disagree with you on Guru...

I think we had this discussion before but I'm not sure that it was you I was arguing with... :lol:

My experience with the Bosch +4s has been a 96 Corvette, 94 ESC, and 98 Chevy Cavalier 2.2L... All 3 ran perfect and over 20K miles on the +4s

On the other hand, every one of those cars, and my 98 ETC experienced loss of the platinum puck, opening up the gap on the stock plugs... I used the +2s instead of the more expensive +4s on the 98...

I know it's viewed as a gimmick, but I've always had good luck with Bosch platinum on cars that were driven hard... The only time I had problems was on an older car that my GM mechanic told me, "stop driving it like a granny"... :lol: I started driving that car harder and the problem went away...

The thing that drew me to the +4s and +2s has been the open design and multiple spark paths... Now I've never had the heads off my NS but it appears the plug is centered in the head... I would think that the unshrouded spark would be better for combustion... Unless I'm misunderstanding, wasn't that the reason the old drag racers used to cut back electrodes and index plugs???

Jim

Hey I hear ya wake. I had bosch plugs and the ol girl ran perfectly fine for 2 years until I changed them out this past fall for ac delcos. And this is where we part ways. The ol girl ran even better than "perfectly fine" with the delco plugs. Other than longer start ups I really don't have anything bad to say about bosch plugs. It's just that in the Northstar engine ac delco plugs are simply better. These guys are right.

"Burns" rubber

" I've never considered myself to be all that conservative, but it seems the more liberal some people get the more conservative I become. "

Link to comment
Share on other sites

What he said! :lol:

Thanks for the excellent seminar on the 93 to 99 ignition system and OEM and aftermarket spark plug features Guru!, we need to save this one!

Early on sailors navigated by the stars at night and the North star became the symbol for finding ones way home. Once you know where the Northstar is you can point your ship in the right direction to get home. So the star became a symbol for finding ones way home or more symbolically even finding ones path in life.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...