when Im under a load I have a miss , its not horrible but its still killing me.... I just put a new set of ngk irridiums in it, wires have about 800miles on them and are 10.2's, still have it.... a couple days ago we but some "blueberry burnout" fuel additive in it but i ran that gas out , threw 10 in, ran that out, put 10 more in, and ran that out and just put 20 in the tank and its still going on...... opti is gm performance that I just replaced about 200miles ago... any ideas?

 

Plugs or their gap what is gap?

 

i left them alone at 50

 

Should I gap them different?

 

I'm dealing with a similar problem. The book says 45, right? I'm thinking I just need a tune..

 

Wicked, if you sig is accurate you might try gapping them a little tighter, when my gap was to big it would idle and drive in town fine but under WOT it would cut out and miss above 3000 rpm. I'm using Autolite 104's @ .030 now.

 

96 that's about exactly what mines doing.... gonna go pull them and knock em down to 30 and ill.let ya know how it goes!

 

What do the old plugs look like?

 

Likely an ignition issue. Cylinder pressures are higher under load which can blow out spark if the gap is too large or too weak.

 

That was the problem, gapped em at 30 and.now.she's running like she should....now time to break this Detroit locker launching tomarow night lol

 

ehhhhpp!

 

I would guess ignition as well.

MAF, o2 sensor, plugs, wires, opti, idk what else it could be.


I did plugs, wires, opti, and MAF all at once.

 

Check for above normal resistance on the plug wires. I had small misfires due to the helical conductor being broken at the terminal on my MSD wires. Repaired the wires and all had acceptable resistance.

 

Lol !

 

Apparently everyone missed the point where he mentioned he fixed his problem...

 

You need to convert to the EFI 24x system, screw the damn opti

 

Love the opti.....I'm.at the.point.with the opti where.I have a.lifetime.warranty and.got.so.good.at.swapping.them it.takes.less.then a hour for a.swap.and back on.the road!

 

It's your blinker fluid level...you over filled it.
Good to know about the plug gap. I had no idea it would blow it out. lert me sumtin new today boss.

 

Same here.... I could have almost garaunteed it.woulda been the refoobulator switch on my dome light but I was.wrong.....

 

All you's guy's had ta do was axe!