[chiefsotos]

I have a bmw with catless Dps, Ic and procede v3 with 2-19-2009 maps and stage1.

With user torgue 85% (about 14+psi boost) i have always very strange boost behaviour in datalogs. The boost after 5500rpm drops and with higher gears 5th, 6th i have limps at around 5000rpm with code 30fc or 30ff (Boost to high at low side, density)

I am steel thinking of boost leak at dv valves (still wait the stett charge pipe to put forge valves), but i remember that Shiv said that when we have boost leak then we can see it when we are dataloging debug word 4 (wastegate).
So i made the datalog and here it is...

If there was at leak at 5900 shouldn't the debug word 4 value be about 70%? Is it possible that it is bmw Dma or procede hardware conflict and so i need to upgrade to another control unit? (jb3 or procede rev2 v4)

[jale france]

I don't understand why you use this old map.
Use the v4 for fix this problem

[Ilma]

The drop in boost looks like normal boost taper above 6K rpm.

If it was a boost leak you probably would be seeing a corresponding increase in your duty cycle - which you don't.

The limping is not normal though. Curious why you are running stage 1 with your mods?

The 2-19 maps were my favourite in terms of power and punch, but as stated already.....you gotta move on to V4.

They are two completely different tunes now.

[chiefsotos]

Originally Posted by jale france

I don't understand why you use this old map.
Use the v4 for fix this problem

Because i don't have procede rev2, just the old one Procede v3

But why others can handle boost around 14psi until 6500rpm. My boost start falling from 5500rpm and after.

[Chefcg1]

have you tried running the MT maps. Less boost tapper. I always have run MT maps in my AT car.

[chiefsotos]

Originally Posted by Chefcg1

have you tried running the MT maps. Less boost tapper. I always have run MT maps in my AT car.

My car has manual gears and i am using MT Maps.

I would like to now from which sensor do the procede datalog read the boost.
Is it from the red circle before throttle body (pic 1)
Or from the red circle in the intake manifold (pic2)
The boost gauge reads from a spot, which green arrow inticates, in the intake manifold (it is the vacuem line that goes to the diverted valves) at pic 2.

I would like to know because in the boost gauge (and it is calibrate)
the boost is always 2 psi more than in the procede datalog.
And after 5500rpm, although in the above datalog the boost starting fall, the boost gauge keep it stable at 15psi.
How is this possible?

[Panoz]

log looks fine by me...

[chiefsotos]

Originally Posted by Panoz

log looks fine by me...

Look at 4th gear. The boost keep falling from 5500rpm until 6000rpm and sudently starts rising again until 6200rpm. It is not normal behavior for a car with catless Dps and Intercooler. Also the ambient temperature was 11c while the inlet temperature reaches about 55c (which is very high for a good aftermarket ic).
I am thinking if this high inlet temperature and datalog boost drop is occured to a bad t-map sensor or a boost leak?

[OpenFlash]

Try triggering that code again. But this time, log debug word 3 (which, in v3, represents dme duty cycle). That will give us an idea of what is bothering the DME. But by the looks of it, it's likely a leak.

Shiv

[chiefsotos]

Originally Posted by shiv@vishnu

Try triggering that code again. But this time, log debug word 3 (which, in v3, represents dme duty cycle). That will give us an idea of what is bothering the DME. But by the looks of it, it's likely a leak.

Shiv

I also suppose it is a leak, because problems with falling boost starts appearing exactly when i installed forged dv valves and one of them didn't sit well in the stock charge pipe and have many limps even with 2nd gear. After that i put back stock valves but they play a little since then. From that time and after, i never get stable boost after 5500rpm in the procede datalog.

2 Months now i am waiting the stett charge pipe to arrive, in order to install forge valves.


But i never understand why the boost gauge indicates stable boost (~15psi) from 4000-6300rpm??? And always shows 2psi more than procede

I will make another datalog as soon as possible and this time i am thinking to remove the vacuum line that goes to boost gauge. (because the gauge is electronic and i want to eliminate the possibility that there is a leak in the pressure sensor of it)

[Ilma]

Originally Posted by chiefsotos

My car has manual gears and i am using MT Maps.

I would like to now from which sensor do the procede datalog read the boost.
Is it from the red circle before throttle body (pic 1)
Or from the red circle in the intake manifold (pic2)
The boost gauge reads from a spot, which green arrow inticates, in the intake manifold (it is the vacuem line that goes to the diverted valves) at pic 2.

I would like to know because in the boost gauge (and it is calibrate)
the boost is always 2 psi more than in the procede datalog.
And after 5500rpm, although in the above datalog the boost starting fall, the boost gauge keep it stable at 15psi.
How is this possible?

The Procede reads boost by the TMAP sensor you circled in pic 1 = part #6. It's the one before the throttle body - not the one on the intake manifold.

I just swapped mine out a few weeks ago becuase of doubtful intake temperature readings (it reads both pressure and temperature).

[chiefsotos]

Originally Posted by Ilma

The Procede reads boost by the TMAP sensor you circled in pic 1 = part #6. It's the one before the throttle body - not the one on the intake manifold.

I just swapped mine out a few weeks ago becuase of doubtful intake temperature readings (it reads both pressure and temperature).

What do you mean by doubtful intake temperature readings? Did the old one read too high temperatures? With the new one have you notice any difference in reading? What symptoms do you have and made you think of choosing this sensor?

Before i put the Intercooler in my car the inlet temperature, with 4th, 5th gear at wot, was always around 80c (very high). Now although i have a top brand Ic the temperature still remains around 50c.

I wonder if T-MAP sensor reads badly the inlet temperature...

[Ilma]

Originally Posted by chiefsotos

What do you mean by doubtful intake temperature readings? Did the old one read too high temperatures? With the new one have you notice any difference in reading? What symptoms do you have and made you think of choosing this sensor?

Before i put the Intercooler in my car the inlet temperature, with 4th, 5th gear at wot, was always around 80c (very high). Now although i have a top brand Ic the temperature still remains around 50c.

I wonder if T-MAP sensor reads badly the inlet temperature...

I was getting some implausible intake readings....

One datalog showed a reading of 268F for the intake temp, then suddenly dropping to 38F and oscillating back and forth a few times within a couple of seconds.

Then on cold mornings, I would read the intake temp before starting the car up and it always read about 20F higher than the oil or coolant temp sensors did.

You would expect that after sitting for 24 hours all the sensors would read pretty much the same core temperature.

So that was kind of a clue that the sensor seemed to be out of calibration.

[chiefsotos]

Originally Posted by Ilma

I was getting some implausible intake readings....

One datalog showed a reading of 268F for the intake temp, then suddenly dropping to 38F and oscillating back and forth a few times within a couple of seconds.

Thank's Ilma, but probably this is not my case. I am having an inlet temperature reading of 20c more than other users.

Originally Posted by shiv@vishnu

Try triggering that code again. But this time, log debug word 3 (which, in v3, represents dme duty cycle). That will give us an idea of what is bothering the DME. But by the looks of it, it's likely a leak.

Shiv

Shiv yesterday i installed procede reader 3.121 and put the 7-29-2009 maps at stage 2.
I want to remind you that my procede is not can bus it is V3 of 8-2008.
I also dismount the boost gauge and made a datalog.

Although i went til 260km, no limp was occured. The debug word 3 show just a stable value (1023).

What i noticed is that when i accelerating from one gear only the boost is stable enough but when shifting the boost start dropping in the following gear.

A very strange thing happens in the shift of 3d gear to 4th. I made this shift very quickly and noticed that the diverted valves didn't open at all and the boost never fall below 11psi during shift.(look at time 10s at red circle.very strange)
Any conclusions???

[chiefsotos]

Any thoughts of last datalog? Why the boost didn't fall in the shift of 3d 4th gear?