post some logs

 

Any updates? Curious to see if any resolution to the issues has been found. I also may have missed, but what ECU? Are you throwing any codes?

 

Sorry for the delays. My work schedule is terrible. Finally got the plugs out and guess what? Yup, cracked. For those that don’t know, a cracked plug will simply not fire right and cause a ground out. The spark wasn’t even hitting the diode as it had a white spark line further up so yeah, brand new OEM Evo IX spark plug cracked. No idea how that happened but we are PRAYING that is the issue. I am putting the OEM Coils back on just in case. I’ve replaced the Exhaust Cam Sensor just in case, no idea if it is bad but it’s old and gets very hot so why not. All boost leaks have been found and fixed, plugs are all gapped to .019. I put in Denso Iridium plugs for now.



Cracked EVO IX Plug

 

Well hope that fixes the problem good luck!!

 

Keep us posted!

 

*****UPDATE 10-09-2019******





Last night I finally swapped in some Denso Iridium Plugs one step colder gapped to .019. Swapped in the stock coils. Installed an new Exhaust Cam sensor. Car wouldn’t hit 20PSI before breaking up and now hits 26PSI no issues.



Well a couple.



Hitting Fuel Cut now, could be because the car is finally boosting or because the car had almost no gas in it (gas light is on). I hit fuel cut on my way to a gas station once at low fuel and then I had to push it to the pump as it stalled while pulling into the gas station so that was luck,



My AEM UAGO is reading DEAD RICH at WOT. At idle it bounces between 14-15 which is fine but any boost it pegs it. On a dyno it reads 11.8 with their sniffer while mine reads 10.0 so I have a Bosch sensor ready to drop in. Very Strange, generally the Wide Bands just fail not give random readings like this.



More boost leak testing to come but FWIW when swapping back on my Stock coils vs the Spoolinup it idles way better, no missing at all.



More to come.

 

I would try the COP on the new the plugs and see what it does. If it goes back to having issues, something is wrong with the COP. Send it back to Matt to have him go through it.

Plugs don't need to be gapped tighter than .020".

 

Dyno AFRs are always leaner, they run at the end of the tailpipe usually. They have access to more oxygen.

I would trust your wideband, it's rich and if you're on E85 (I can't recall) that will cause drive-ability issues.

You might be hitting the Load limits in the ECU. They may not have been raised.

 

That may be true. I'm on 93 octane. WIdeband is rich at WOT as previously stated. The car runs great now just needs a final tune.

But again...

My AEM UEGO reads 10.00 AFR and the Dyno reads 11.8. How in gods name could it change that much?

I'm swapping in a new wideband soon.

 

Update October 14th 2019.

I had the Evo out all day yesterday. WOT 25.5 PSI and not a hint of a miss with stock coils and Denso plugs one step colder at 0.019 gap. Turbo spools faster for sure way more progressive Vs. an On-Off. What I also found out yesterday that my Act Sprung 6-Puck shifts like butter at 8000+ RPM's. I was shocked at how easy it did. Good clutch if you can handle initial engagement which I can. The Evo makes and holds power well past 8000 I have no idea where to shift now as I've never had this much top end before. My previous setup was OG S1 cams and a stock intake manifold so I think my VSR and S2's are making my FP Red happy.

Things to do:

Check for more boost leaks. It was hard to get them all with a cracked VSR but since it is fixed we will tackle the rest.
AEM Wideband is junk, reads perfect at idle, any boost pegs it to 10.0 which I simply do not believe. I've read countless threads from multiple forms that states that even when pegged at 10.0 your AFR's will actually be high 11's. I saw for myself that my Evo that last time it was on a dyno read 10.0 AFR via wideband and 11.8 Via dyno sniffer. AEM is absolutely responsible for blown engines if people have tuned by this. I will swap in my 4th Sensor now to see if anything changes.


Still need a final tune and boost increased. Afterwards I'll post logs but I'd like to run 29PSI and some timing I think I can get near 500WHP DynoJet.

 

Have you contacted Matt/Spoolinup about having him go though the COP?

 

If your running e85 over 500 whp no problem but on 93 pump gas you will be boost and timing limited, I say 450-470 on dynojet, maybe a little more good luck!!

 

It's easy to change that much, it's got way more access to oxygen.

You can test the theory that it's bad.

Take the sensor out, plug the hole, mount it where the dyno sniffer goes, inside the tailpipe.

Go for a drive. If it reads leaner, sensor is fine.

 

I would think the dyno sniffer reads higher because fresh oxygen is much closer to sensor and there's not a guaranteed way to keep oxygen from going backwards through tailpipe into muffler. Mufflers buffers exhaust pulses and you never know how exhaust flows really are. If you have a pipe for muffler, I'll be more confident in that reading at WOT.

Also, there are 2 uego (LSU 4.2 and 4.9) One is old version (LSU 4.2) that is known to eventually go bad.

 

Yes,

I'm mailing him back my new unit for another. Maybe I got a bad coil? Who knows but Matt is as solid as they come.