I just recently installed new plugs and msd 8.5mm superconductor wires. At idle it is a little rougher then before...the rpms seem to drop a little and then go back up. Just a tiny bit...cant even really see it on the tack...just feel it. The plugs all went in with no problem or anything. And they all had normal wear on them. Any ideas as to what this may be?

 

If you improperly gapped a plug or didn't gap them they could of come improperly gapped. You may of not put a plug wire on fully and there is the possibility that one of the wires is a defect.....but I'd check the other ones first.

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1984 WS6 Trans Am Hartop
Former L69 Car under restoration
1984 WS6 Trans Am T-top car
4-bolt main 350, headers, Holley 650, T-5 and 3.23's.
Daily driver and restoration
13.98 @ 101

 

check what 84fta said first..

Also..what kind of plugs did you use?

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91 Formula
305 TPI 5speed
1LE/G92/WS6
K&N, SLP airfoil, ported/polished plenum, March pulleys, TB coolant bypass,Crane AFPR(47psi),Crane Gold 1.6rrs,MSD coil,MSD6AL, Holley 9mm wires,Bosch O2sensor, SLP headers & catback,3:73s w/Auburn posi,stage2 fastchip,160* t-stat,JET 195* fan switch, Macewen white face gauges, Autometer gauges, Zoom hi-performance clutch.
Street legal with stock throttle body, runners,intake manifold,cam, and heads.

 

I used Bosch Platinum's. I gapped all the plugs...although on one of the plugs the electrode felt a little loose...could this cause it? Im not having any driving problems...it runs stronger then before...and other then the slight rpm jump at idle is fine. Is this something i should worry about...or not too big of a deal? I guess im asking if i should just leave it as opposed to having to redo all those goddamn hard to reach plugs.

 

It all depends on how much of a "jump" it is. If it's real noticeable then it's probably almost atleast a minor miss. If it's only really noticeable to you and you can keep your sanity in check it'll be fine to drive around like that.

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1984 WS6 Trans Am Hartop
Former L69 Car under restoration
1984 WS6 Trans Am T-tops
4-bolt main 350, headers, Holley 650, T-5, dual elec. fans and 3.23's.
Daily driver and restoration
13.98 @ 101

 

Bosch Platinum are already pre-gapped.

Try AC DELCOs 45TS. You don't need the platinums

 

It doesnt hurt to gap'em yourself and you might have a wire crossed.

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Pretty damn smart with cars for 17!
91 Camaro RS, 305 TBI
No mods yet...Hopefully:
Convert to dual-cat with headers and Borla catback exhaust.
Edelbrock MPFI system.
RAM air hood & Z28 wing.
Z28 cam.
ABS system.
Positraction rearend with rear disc brakes.
Rebuilt front and rearend suspension with polygraphite bushings.
Strutbrace.
Rollbar.

 

If it was a crossed wire, it would probably be running a lot worse. Are you sure it started right after you did the plugs and wires? You might want to check your IAC. Hope this helps.

 

Check your Timing too...

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--Steve S-- 84 Trans Am 305 (cough)LG4(cough), 5 speed, Flowmaster 80 series, otherwise an emissions restricted slow 150 hp(chilton rating) 240 torquer that needs RELEASE!!!!

P.S. Daily Driver

 

I've heard that you aren't supposed to gap pre set platinum plugs because you can chip the plat. tip and break it away.

I don't know if this would cause a noticable problem or if its even true.

Could just be "bench racing"

If the plug electrode was loose I would check it out. I've had a electrode come off the end of the plug and smash between the valve head and seat and bend the valve, the electrode piece was still stuck in the seat.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

[This message has been edited by Engineboy (edited January 12, 2001).]

 

Bosch platinums are not pre gapped. bosch platinum +4s are pre gapped....cuz there are four contacts....a gap tool wouldnt fit. anyways...sounds like it could maybe be a lumpy cam...or your imagining things or the ac or something could be on...or your just trippin....or ignition probs.

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Rick
90 Camaro RS 305 TBI
400 small block, Hooker 1 3/4 LTs, Random Tech Cat, Hooker aero chamber cat back on the way!!
TH700-R4 with Trans-Go shift kit (corvette servo here...but not installed yet)
MacEwen Motorsports White Gauge Overlays
14" K&N X-Stream Open Element
GTS Headlight and Taillight covers
5% Limo Tint all around
Classic White Chevy Bowtie sticker on rear window
http://www.geocities.com/esvalenz

Man if my camaro were a rice-rocket all those mods would give me what...easily 50-60 hp!!!

"Just because I've done it, doesn't mean I knew what I was doing!" - Me