Too rich - Hyundai Genesis Forum
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post #1 of 18 Old 06-30-2010, 10:24 AM Thread Starter
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Too rich

I'm using the CMD with the WB2 from DynoJet. I have the autotune running and have repeatedly applied the trims. But I still go pig rich at various rpms and the engine will hiccup.

I did have the TP calibration set to low and got that fixed today.

I also get a boost bounce. No matter what I set the peak to it will hit that (currently18 psi), then drop to 10, bounce up a bit then settle around 12-14.

I tightened all my clamps for the IC. No better.
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post #2 of 18 Old 06-30-2010, 11:01 AM
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Don't happen to have a Forge MS BOV do you?

I had the same thing happening to me when I had the forge bov on there. Apparently it shipped with the wrong spring so I was getting pending codes for the bov and/or map sensor. The CMD logs would show a split second cut in throttle with a 5-10psi dip in boost depending on where it happened. As soon as I went back to stock that problem went away. Forge sent me some springs for the BOV but I haven't had a chance to play around with it yet.
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post #3 of 18 Old 06-30-2010, 11:07 AM Thread Starter
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I have the TiAL BOV. Don't hear it letting loose when this happens. It is ran in parallel with the OEM setup. I didn't get the boost bounce until I went to the DW 550 FIs and the larger 3" post cat second cat eliminator intermediate pipe. I have tightened the wastegate up a full turn from stock, made no difference.

I am running the OEM IC to TB hose at the turbo outlet to IC pipe. Maybe this is being stretched causing the boost bounce?
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post #4 of 18 Old 06-30-2010, 11:12 AM Thread Starter
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I guess I need to take it off and see what I have for a spring. I do pull a pretty good vacuum at idle.
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post #5 of 18 Old 06-30-2010, 01:45 PM
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that sucks, it's too bad you don't live 3 miles away from the dyno jet facility like me or you could have them check it out and get it all straighten out, how is the dyno jet tuner? I am trying to wait for an aem system to come out and was wondering about the dyno jet system or should I just keep the money and wait for the aem one to come out, i'm going to be sending in my engine for a build by the end of the year to ams then the turbo kit afterward so I got time.....

R-spec FTW
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post #6 of 18 Old 06-30-2010, 02:25 PM
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What mods do you have on the car? I am running a HKS BOV in the stock location with the cpe intake a downpipe and full exhaust with the Power Axel module and the 20lb tune. Do you still have the stock cat behind the turbo on the car? If so why did you jump to the 550cc injectors? I could be wrong but unless you have gone all the way the stock injectors are good for about 235HP and 280 or 290 tq I believe. Sounds like there might be a bad tune here maybe? When you installed the Tial BOV did you put it in the stock location or did you do a block off plate and relocate it?

I think if you are still running on the stock cat i would just put the stock injectors back in the car. I think your injectors are to big for your mods without a custom tune.
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post #7 of 18 Old 06-30-2010, 03:15 PM
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Do your logs show throttle % or boost duty cycle being cut the same time boost drops? Have you tried using the Open Loop boost control feature of CMD? It basically puts the CMD in command of the boost solenoid like a stand alone EBC would. If you set it up that way and boost still fluctuates than it's a mechanical issue. If boost stops fluctuating with the CMD in total control of the solenoid then the ECU is responsible for cutting boost for some reason. I wouldn't suggest just setting it this way and forgetting about it though if it does fix the boost fluctuation, since the ECU is cutting boost for some reason...



You'll need to log and create a histogram for boost duty cycle and copy those results into the boost map as well after changing the config settings. The boost map will no longer be an offset of stock but direct control of the solenoid regardless of what the ECU wants. All zeros in the map will basically keep it wide open you'll run whatever the wastegate actuator is set to...

Last edited by CrookedH; 06-30-2010 at 05:31 PM.
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post #8 of 18 Old 07-01-2010, 09:25 AM Thread Starter
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I wish logging was easier with this software. Compared to what I'm use to it's a PITA to have to make up tables and readouts. Not being able to advance the logs step by step or see the info all at once.

DynoJet did allude to TPS signal.
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post #9 of 18 Old 07-01-2010, 10:30 AM Thread Starter
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I looked everything over again phsyically. Took off the PCV valve and it does leak back but not enough to cause a drop in pressure of 6 lbs or so.

It does appear the ECU is dropping the boost as it always goes back to 12 lbs after hitting the peak and oscillating twice. This is no matter what I set the boost to.

So why would the ECU be cutting boost and limiting it to 12 psi every time?
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post #10 of 18 Old 07-01-2010, 03:25 PM
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Hmmmm. Do the logs show throttle being cut or just boost duty cycle?

Did you get a chance to try the open loop boost control? I've got a map setup that will run about 19psi with the open loop control enabled if you want to give that a go. Just shoot me an email address and I'll send it over.
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