SoulFunkdUp

Any ideas? I can back off the throttle about a quarter of an inch or so and everythings fine but if I floor it, I lose spark. It drives fine otherwise. She's all stock so I'm sure there's plenty of areas for me to look at.

My thoughts are the WG or BPV. I do have an exhaust leak that I havent located...can that do it?

Thanks once again.

blown 944

plug gap

931guru

Bad plugs... don't use platinum plugs, use Bosch WR7DC

vette951s

Too cold a heat range on the plugs can also cause this.

John

jasonlp

On the dyno I saw a nice difference between Bosch and NGK

Go for NGK BPR7ES and pinch the tips with needle nose at the centre of the tip so they don't come loose

I'm running a step colder but generally most who use NGK on 951 use BPR7ES.

Tom M'Guinn

It does sound like classic signs of a weak ignition -- check plugs, wires, cap and rotor.

SoulFunkdUp

Sounds like I was way off. I'm using NKG 6637 BPR6EIX iridium plugs.....no good?

fast951

It sounds like a ignition related problem. Check/replace if needed coil, plug wires, cap, rotor.

Use the Bosch WR6DC plugs (one heat range colder than stock WR7DC).

SoulFunkdUp

Thanks Jon! Oh and I got the tracking info today....I'm like a kid before Christmas.

SoulFunkdUp

Could it be an issue with the alternator?

Just off the phone with my local parts store and they dont carry Bosch WR6DC/WR7DC and they dont carry NGK BPR7ES. They have some platinum NGK's or NGK 7131 but thats it.

blown 944

how about ngk br7es

they should be pretty common

Rogue_Ant

Yep - what I run...


-Rogue

jasonlp

BR7ES vs BPR7ES = same difference performance wise

P=Projected Insulator Type= to stop any electrical interference from being emitted, engine wise no effect

SoulFunkdUp

Thanks jasonlp for the clarification. I bet I can find those around.

So why does this happen with the iridium ngk plugs I have now?

INURGRL951

Yes sound like you have a bad distributor cap that has unseeable cracks in it which cause this issue and the reference sensors could be adjusted alittle too much out (gap too big) and it looses the reading at higher rpm's