setzep

At first I was thinking it was bad gas so I burnt the tank out and refilled.... still there.

Then I thought maybe it was the old plugs I had in there, got new ones...... still there.

Checked timing and is zeroed.

The only thing I didn't do yet is watch fuel pressure at high rpm/load.

It has never missed before and I'm starting to pull my hair out. Anyone have a idea?? Also how do I tell if it's missing due to a fuel problem or a spark problem?

Thanks in advance

jreynish

iTrader: (2)

get us a datalog of the pertinent information?

setzep

I forgot to add it's a bit rich in those areas which to me says it's not a fuel delivery problem.

When I say rich I mean high 10's low 11's @7-11psi. Will that much fuel cause it to miss?

setzep

I wish I could but unfortunately I have a iMac and a shitty old laptop for the haltech.

I did do a datalog of the event and it all looks pretty good, no uneven rpm points, timing isn't all over the place ect..

jreynish

iTrader: (2)

there is no spikes in RPM? or injection pulse?
If not then I have run out of ideas.
Sorry.

setzep

looking at Datalog right now... Hmm.. I see a spot where it jumps from 5.040 to 6.020ms but it's at a spot where my boost was hunting a bit so it's hard to say. RPM is a steady climb.

The datalog for my WB shows a huge spike when it misses.

A pull from ~3500 to 7k it might miss 1 or two times.

setzep

I leaned it out a bit and now it's back to normal.

p51020b

malpassi fuel pressure reg ? .......

setzep

nope, I have an aeromotive