-= Ultimate Emanage Thread =-

[Trevor]

Does anyone else's boost logs look like a sawtooth pattern while at full throttle? I'm talking about close to a +/- 2.5 psi VERY FAST variance. I didn't record any runs on my Defi gauge setup to verify its actually happening. Maybe it's because i have the logging setup at the fastest sample rate.

[RobBeck]

where is your map sensor sourced to the intake?

Rob

Originally Posted by Trevor

Does anyone else's boost logs look like a sawtooth pattern while at full throttle? I'm talking about close to a +/- 2.5 psi VERY FAST variance. I didn't record any runs on my Defi gauge setup to verify its actually happening. Maybe it's because i have the logging setup at the fastest sample rate.

[VR4neophyte]

Originally Posted by Trevor

Does anyone else's boost logs look like a sawtooth pattern while at full throttle? I'm talking about close to a +/- 2.5 psi VERY FAST variance. I didn't record any runs on my Defi gauge setup to verify its actually happening. Maybe it's because i have the logging setup at the fastest sample rate.

Yes, mine looked just like that as soon as the wastegates opened. Then the boost varied as much as 2.5 psi between the peaks and valleys. It wasn't as much of a sawtooth pattern as boost was climbing.

Erik

[Trevor]

Originally Posted by RobBeck

where is your map sensor sourced to the intake?

Rob

I have 3 additional prts that are located on the back of the surge tank in the plenum. The MAP sensor pics up one those direct (no-T's or anything).

Originally Posted by VR4neophyte

Yes, mine looked just like that as soon as the wastegates opened. Then the boost varied as much as 2.5 psi between the peaks and valleys. It wasn't as much of a sawtooth pattern as boost was climbing.

Erik

Well..the problem is my gates shouldn't have been opened. I had the boost controller pegged at 35.55 psi. The logs showed a sawtooth pattern after the re-spool in every gear. Between 3rd and 4th gear the lowest spike was 23.4 psi and the highest was 28.8 psi. Weird.

[VR4neophyte]

Not sure then. I always blamed my turbulent readings on the boost solenoids in the DSBC. To be clear, the difference between my valleys and peaks was only 2.5 psi, rather than +/- 2.5 (range of 5 psi).

I dunno. Some kind of plenum resonance causing backpressure that cycles rapidly? Just a stab in the dark.

[doctorstupid]

I've run into an issue with an emanage ultimate install, specifically this thing is pig fucking rich, to the point it cnanot run, with no obvious explanation.

Currently the car (94 TT) has stock injectors and MAF installed, emanage ultimate with the injector and ignition wires all intercepted for add/trim fuel adjustment. I cannot get an RPM signal from the rpm wire specified in the first post of this thread, nor greddy's manual (they are in fact 2 very different wires). I can only get rpm with the crank angle sensor, which is fine by me unless this is interfering with something.

Now I do not have the injector harness installed, as this wasn't brought to my attention as being necessary until 20 minutes ago (whoops). Greddy's description of the unit, in engrish, is "This adaptor is to prevent the problem if fuel setting becoming rich when there is no adjustment made." I have all maps zero'd out, including airflow, fuel 1/2, and inj 1/2, all paramters are set correctly as far as I can tell.

This thing is trying to run insanely rich, to the point unbruned gas fumes are coming from the exhaust. After drying plugs and cranking the engine with ECI fuse pulled to move air through and get gas out of the cylinders, it'll try to start and catch for a second, get to 1,000rpm+, and then stumble out and die with the CEL on.

Greddy is closed at the moment, so i can't ask them, do I need this adaptor to make it run? If this harness is not critically necessary to install, I'll go over what I have done so far to try and solve it, and hope I'm just missing something stupid

[VR4neophyte]

Originally Posted by doctorstupid

Currently the car (94 TT) has stock injectors and MAF installed, emanage ultimate with the injector and ignition wires all intercepted for add/trim fuel adjustment. I cannot get an RPM signal from the rpm wire specified in the first post of this thread, nor greddy's manual (they are in fact 2 very different wires). I can only get rpm with the crank angle sensor, which is fine by me unless this is interfering with something.

Now I do not have the injector harness installed, as this wasn't brought to my attention as being necessary until 20 minutes ago (whoops).

If, in that last sentence, you mean the injector adapter, then yes, I belive you MUST have it installed. But my frame of reference is OBD 1, so it may be different for your car. Without the adapter, mine ran really rich to the point I had to lean it out a lot. Then with the adapter, I had to throw away my tuning-to-date, and add a lot more fuel back in. Without the adapter, I also got a CEL (based on the injectors.)

If your car is like the first gens, then you need the adapter for sure.

Not sure why you can't get the rpm signal from the rpm wire. I had all the wires connected, and got the rpm signal from each of the drop-down box options. But the crank angle sensor caused other rpm signal problems, so I went back to the rpm wire itself.

Erik

[doctorstupid]

Originally Posted by VR4neophyte

If, in that last sentence, you mean the injector adapter, then yes, I belive you MUST have it installed. But my frame of reference is OBD 1, so it may be different for your car. Without the adapter, mine ran really rich to the point I had to lean it out a lot. Then with the adapter, I had to throw away my tuning-to-date, and add a lot more fuel back in. Without the adapter, I also got a CEL (based on the injectors.)

If your car is like the first gens, then you need the adapter for sure.

Not sure why you can't get the rpm signal from the rpm wire. I had all the wires connected, and got the rpm signal from each of the drop-down box options. But the crank angle sensor caused other rpm signal problems, so I went back to the rpm wire itself.

Erik

Yes, I mean the injector adaptor #15901507.

Wish I'd known this about a week ago, I'll have it overnighted in the morning I suppose.

That said, any other possibilities? Any jumper settings that need to be changed for the add/trim configuration? Any more parameters I need to change around (currently set to +/-), anything at all I need to know?

EDIT: I have read the first page or so in great depth, but 51 pages is an awful lot of reading, so forgive me if this has been covered

[VR4neophyte]

I can think of nothing else. I ran all jumpers at default position.

(You should've seen the length of the thread before 1/3 of it was deleted mistakenly!)

[RobBeck]

Trevor.

I had similar "problems" when logging with the Maft Pro. What I found out is that you have to be really careful when picking your "source" for the MAP sensor. For some reason certain areas of a surge tank see surge/resonance waves which really show up well on a map sensor.

At your earliest convenience... plug off your existing direct port for the MAP sensor and T it off the standard port at the "Throat" of the plenum. You want it to reference pressure before it enters the surge tank area similar to where the BOV and other solenoids reference. From what I have seen, it really cleans up the spike or surges that you see as compared to the other undersirable locations.

Rob

Originally Posted by Trevor

I have 3 additional prts that are located on the back of the surge tank in the plenum. The MAP sensor pics up one those direct (no-T's or anything).