How much would this cost? Just thinking about replacing the spark plugs and wires, pcv valve and EGR valves.

Spark plugs, $28.00 bucks, wires, $80.00 bucks, anyone know how much the PCV and EGR vavles would be???

Is this an easy do it yourself job? I watched a video on a website, the PCV valves are a snap, just pull a boot of, unscrew, and screw the new one in.

Spark plugs, well, taking them off is easy, but measuring the gap, would I need tool's for that? Some of them come "pre-gapped", but I heard that a spark plug wrench is required.

Alright, if you're spending 80 on plug wires, check these out, Bosch Platinum +4's. Best spark plug ever made, trust me, if you're willing to spend the dough for them (about $6.00 a piece) you'll be well impressed. Most any auto parts store should carry them. If you go with a plug like this, you won't need a gapper, but you may as well pick them up, they're usually one of the small impulse items next to the cash register for about a buck. A spark plug wrench is just a 5/8th inch socket with a rubber ring inside to prevent damage to the plug. You can get one at K-Mart. I'd buy one at Sears or from Snap-On, but then, I do a lot of automotive work, and just cause I don't buy tools at K-Mart. Plugs are doable if you've got the time and patience, just don't drop one on the engine cross member. As for the PCV and EGR stuff, get someone else's opinion, I don't know much about them, never really cared for that emissions jazz.

Brian

not to steal your thread, but are the +4s as beneficial on older carburated cadillacs?

You can buy a little plug-gapper cheap at the auto parts store, so that's no biggie. There are a couple plugs that are pretty hard to get to, though, so, you know, have some Band Aids ready. :2thumbs:

all the +2 and +4 plugs are is a gimmick to get a sucker to spend 6 bux a plug instead of $1.25. standard AC delco's work perfect.

don't replace the EGR if it isnt broken..... why spend the money unless the computer is throwing the EGR code at you and you verify it's not good?

PCV should be around $2.

I won't argue with you, standard Delco's do work just fine, but you can't tell me that the +4's don't make a difference. I changed the plugs on my 85 Parisienne with basic Champion $1.89 plugs, and 4 thousand miles later, I was sold on the +4's by the sale rep at my parts store. Trust me, I could feel a difference, not to mention the much longer life of the +2's and +4's. But Patgizz is right, if you're not willing to fork out $6.00 a plug, standard Delco's work great. However, if you consider how important the spark plug is to the operation of the whole engine and how often it's overlooked, I'll stick with the piece of mind of having a plug that can easily do 100,000 miles, gives me better gas mileage, better acceleration, and doesn't need to be gapped. Other than than, Delco are fine.

Brian

all the +2 and +4 plugs are is a gimmick to get a sucker to spend 6 bux a plug instead of $1.25. standard AC delco's work perfect.

don't replace the EGR if it isnt broken..... why spend the money unless the computer is throwing the EGR code at you and you verify it's not good?

PCV should be around $2.
You must have never used the platinum 4's. You can definitely feel the difference in seat-of-the-pants testing…

i tried them right after 1,000 miles of standard delcos in my lumina's 3.4L twin dual cam. no difference.

i don't doubt you saw change from champions, they're 1000% crap even when new

I've never used champions... I had the Bosch Platinum 4's in a couple of my previous vehicles. It made a big difference. I want to put the Bosch 4's in my Northstar next tuneup.

I've seen a lot of talk on the Bosch +4's on other posts. I hear tell there are problems with them on specific applications, I think the 4.9's. I asked Bbob if he though platnums would benefit my old 4.5, he recommended the AC Delco dual platnums (yes, of course) but did not lead me to expect a dramatic change in performance/economy. He did say they should last 100k +/-. I found them for 6.39 ea at my local Napa Auto Parts store.

Kev

For the 307 Bosch 4's will make a difference? There is a line between percieved performance and what is the actual performance. Currently I doubt there is a difference but perhaps on a high performance engine the 4's would be beneficial. I wouldn't mind using them once to try on a project car I'm working on which could actually be faster than the land boat.

I wonder if any plug would make a noticeable performance diference, unless the engine design requires dual platnum as in the case of many late model engines, '96 and above. I think the ignition system has more potential for performance increase. From what I've read and heard, the major benefit we might see in our older engines with platnum plugs is that they last as long as 4 conventional sets. We would save the bloody nuckles on 3 sets of plugs. That counts for a lot in my book!

Kev

But we can't gap the bosch platinums. With the standard delcos, I can wire brush to clean them, gap them again and they're as good as new. I know that the boschs reaches the operating temperature faster making it cleaner etc etc.

Tell me about knuckles, I just did the sparks on my moms sunfire today...must invest in 4 bosch....

You can gap the ACDelco dual platnums :bouncy:

Kev

For the 307 Bosch 4's will make a difference? There is a line between percieved performance and what is the actual performance. Currently I doubt there is a difference but perhaps on a high performance engine the 4's would be beneficial. I wouldn't mind using them once to try on a project car I'm working on which could actually be faster than the land boat.


I know what you mean about percieved performance. I think my car runs better when its clean...http://www.cadillacforums.com/forums/images/icons/icon12.gif

I won't argue with you, standard Delco's do work just fine, but you can't tell me that the +4's don't make a difference. I changed the plugs on my 85 Parisienne with basic Champion $1.89 plugs, and 4 thousand miles later, I was sold on the +4's by the sale rep at my parts store. Trust me, I could feel a difference, not to mention the much longer life of the +2's and +4's. But Patgizz is right, if you're not willing to fork out $6.00 a plug, standard Delco's work great. However, if you consider how important the spark plug is to the operation of the whole engine and how often it's overlooked, I'll stick with the piece of mind of having a plug that can easily do 100,000 miles, gives me better gas mileage, better acceleration, and doesn't need to be gapped. Other than than, Delco are fine.

Brian

Champion Plugs?!? A gerbil on a wheel is better than champion plugs :bonkers:
ACDelco makes a platinum plug for the Fleewood, they were factory installs on 95-96 cars. The front right requires you to remove the front wheel to change the plug, I know, had the replace mine at 100,000 miles.:hmm:

You can gap the ACDelco dual platnums :bouncy:

Kev

Dual Platinum??? What the heall are those?:hmm:

Champion Plugs are not that bad. When one of the plugs crack on our 97 3100 malibu, P put a champion in it and it ran fine. When i had the plugs change 5k later it still looked new. The plugs I put in it was ac delco rapidfires.

We were just ragging on the champion plugs. But the AC plugs are still better:D

We were just ragging on the champion plugs. But the AC plugs are still better:D

I have had only 2 plark plugs actually FAIL in my lifetime. Both were Champion. And in less than 1000 miles. Open resistor, no conductivity through it. Junk, that is all.

For me, I take Autolites or AC Delco, then, well, nothing else.

Reason? They Autolights and AC Delcos are some of the toughest plugs for turbos, they survive a lot of boost and still ignite. Maybe it is old school, but gimmick plugs like the Rapidfires (the originals had some good theory), Splitfire and Plus 2 or 4's aren't worth much.

I would want to see A-B-A tests, New AC Delcos or Autolight plugs on a chassis or engine dyno, then swap to Plus 2's or 4's, or Splitfires or whatever, then dyno it, then go back. I would be willing to bet no differences.

The Plus 2's are the only ones that MIGHT stand a chance, as they don't shroud the spark. The Plus 4's block spark from direct exposure to the A/F mix. I have had good drivability out of side gapping AC Delco's, but they don't last more than 12K miles. You cut the ground electrode to get your gap sideways. It works, old racer trick. But again, how much does it gain? Only the dyno will tell....

You cannot compare old plugs to new plugs, yes, they WILL perform better. But now compare new to new....

Tom

We were just ragging on the champion plugs. But the AC plugs are still better:D

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What does "AC" stand for???

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