I've got my trailing fixed and seems to be running well. Im having some real issues right now when my secondaries are kicking in now its a massive hesitation and almost a backfire but once they are one, its fine til redline. Any suggestions ?

 

whats your afr curve look like? maybee you didnt set it up correctly?

 

the hesitation means you're not getting enough fuel while it's transitioning.

Are you using my staged injection transition code? what are your settings like?

 

whatever the problem is, it will be alittle bit before I get to continue diagnosing it. I broke an apex seal this morning during the transition period I hope to have it running in a week or two after I rip apart the motor.

 

not good. Could you at least post your settings so I can tell you how to avoid this happening again?

You never want to be transitioning on boost anyway. I'd set it up so that you transition when either at or above 100 kPa or above 4000 rpms. That way you're ALWAYS running all 4 injectors when you're on boost or at higher revs.

You should also set up my transition code to transition over a period of about 25 ignition events.

 

im really starting to think its a fuel delivery problem, momentary loss in pressure either by the pump or the regulator. The ironic thing is I was on my way to buy a fuel pressure guage when it happened.

My stagged settings where 120Kpa or 4200 rpms. my ARF numbers where all rich during the transition the way it was driving was like the car was starving for fuel during the transition under boost, during low boost the transition was transparent but during boost it was very noticable that somthing was wrong. The car would buck and lurch during the transition but like I said it was ironic I was on my way to buy a fuel guage to watch the pressue during the transition.... Oh well now I can clean the engine bay thats the brightside.

 

it could be electrical too. When the secondaries come on, if the grounds on the MS aren't great, you can end up with some electrical noise and such which causes problems for the VR sensor conditioners.

 

my grounds all terminate at the same point on the firewall and I thought they were all good.

 

This is one of those situations where it's really good to have the harder RA seals to help you keep from breaking **** while you learn how to tune yourself.

 

well, like I said before, I wouldn't ground to the firewall, I'd ground to the engine. I've had problems grounding to the firewall before, but never had problems when grounding to the engine (most car manufacturers have a couple of grounds on the engine, I figure they do it that way for a reason).

Your grounds might be fine on the firewall, but like I said, I've had problems with grounding there.

 

Yikes. Grounds to the engine! I did something very similar (only 1 ground to the engine) and was having some major problems with the car just running.

Is the rest of your electrical system stock?

 

Yep its a shitty deal but that part of the learning experience as far as I am concerned. Muy, if you remember Im running all my MS grounds to the spot on the firewall that has the factory ground strap going to the back of the engine. I replaced the factory ground strap with a 12 awg wire with copper connectors on each end. So I guess I can make an isolated terminal that mounts on the firewall at that location instead of letting my grounds contact the firewall altogether and let them run through the strap to the engine. In any event I will be ripping my motor out over the next week or so, I replaced all my seals about 6 months ago so I should be able to get away with reusing the gaskets and the rear rotor seems fine, and just replace the front seals, the only question is what shape the housing is in.....