Ric

I put in a set of Bosch Platinums in a week or so ago, gapped at .060". They smoothed the idle out, but around 5500-6000 rpm, it pinged a little. It went away in a day or so, so I didn't think anything else of it.

Welp, I put a lid on yesterday(my first real mod, woohoo!), and it now idles even better, comes off a hard rev quicker, and when I hammer down from 3k in 1st, it feels like somebody rear-ending the car(more so than before).

Now to my problem. Remember that ping I mentioned? Well, it's back more than before, in the same rpm range. Is this also something that the computer can take care of, or am I gonna have to let a tuner loose on it?

gwj

Well, the computer will take care of it by pulling timing. Might be crappy gas.Could be oil mist coming in by the PCV valve, could be carbon build up in the combustion chambers. Might try some GM top engine cleaner. I like the aerosol type because it helps get rid of oil in the intake. Just unbolt the MAF and spray it in the TB while holding a slightly high idle. You will get the SES light on, (from having the MAF unplugged) but it will clear itself after a while.

99hugcam

iTrader: (9)

get some ngk's!

cam75w/ls1

iTrader: (2)

I can tell you from experience that bosch is the worst thing to put in an american car. The tip(platinum)is so small that if you have ANY oil consumption, issues w/ fuel mixture, anything to stick in front of the electrode, the plug quits. I've also had alot of performance problems. I run the ac delco plugs in GM cars period. Just thought I'd put that out there.

snake charmer

iTrader: (118)

i would take every spark plug out and look for cracks. sometimes there might be a bad spark plug that has been damaged somewhere along the line. i had a similar experience when i hit past 3k the car would not perform and after a spark plug change, then it seemed ok but i figure i would check all the plugs and sure enough i had a small crack in one of them. just check them out and use that as an excuse to swap them for some ngk.

Ric

Will the computer remember the pulled timing at high rpm?

Gaswise, I did put a can of B12 Chemtool in the last tank to clean the injectors and stuff, so that could be all it is.

As far as the Bosch plugs sucking, I'll remember that when it comes time to change these. Might even get me some of them fancy iridium plugs for $12... EACH.

conan

iTrader: (5)

You don't need the $12 plugs get a set of NGKtr55 there about $1.85 each. What octane do you run?

Ric

At least 91... most places here have 92 or better.