Robert AMG

iTrader: (1)

This is my first post here, I live in Lebanon, I own a C32 02, I have installed some modes the last few months:
LET 185 pulley, LET tune, LET phenolic spacers/Needswings gaskets,
SL55 y and Hoses, K&N air filters, 4 cats removed, -10C, Johnson Pump, IK20 plugs.
But after I installed the Pulley a fault code on Star Diag appears:
B28 pressure sensor short circuit to positive p0108
I replaced the MAP sensor and the fault reappears, did any one have an idea about that?
Also the car did not work well with the tune, Jerry told me to buy the LM-1 for reading the A/F ratio cause we don't have here Dynos, so next few days I'll install it, get the A/F ratio and resend him the ECU.
What do u recomand guys for an HE: code3, LFP or eurocharged...??
Thanks.

jturkel

Eurocharged Heat Exchanger

you removed all four cats? eww...how does that sound? i have heard clips and it is not pretty

razormb

Exactly how is your car not working well? Does your S/C disengage under part/WOT?

I have the same code followed by P20D4 Load Limit Active (P1999). What is the part number of the MAP sensor you replaced? The new sensor should be 005-153-72-28.

Robert AMG

iTrader: (1)

Yes I removed the 4 cats, here we don't care about pollutions, i replaced the front cats by straight pipes and the rear by a custom muffle: very high sound (owsome) specially at high rev, yes there is little clips at low rev under part throttle but its ok i enjoy the sound.

No my S/C does not disengage, I have replaced the MAP sensor with the same number that was on the old sensor: 004-153-33-28, my MAP code is followed by "malfunction of secondary air injection" code but i think these 2 codes are not related.

The issue is that i want to be sure that the car does not show codes especialy pressure code before i resend the ECU.

Eleventeen

A P0108 is the MAP high limit fault. It means you are boosting over 22psi, which is likely with the 185mm pulley.

jturkel

can the MAP sensor be easily upgraded? will the ECU be able to adjust to it?

Lenin

I also have a P20D4 code along with P2027 (I think). Something to do with the B28 component (aka MAP sensor). I also get IAT of between 185-205 at which point the supercharger refuses to make any boost.
I'm taking a wholesale aproach. I have ordered the Johnson pump, the MAP sensor and the IAT sensor. To replace the MAP sensor you need to get to the Air Distribution Y-pipe by removing the air filter boxes and the supercharger air distributors.

razormb

I just changed mine.. its in a tight spot but I was able to do it without taking the air charge distributors off.

razormb

Any way to get around it other than reprogramming the tcu load limits?

jturkel

which one did you use? brand? what bar capacity?

Robert AMG

iTrader: (1)

I have changed the MAP sensor without taking off the air distributors but it is somehow difficult. I installed a new OEM sensor 004-153-33-28 (no bar capacity on it), the fault code reappeared.
I think this fault code do not effect anything it is only a high limit fault like "Eleventeen" said.
I installed the LM-1 : below 5200: A/F= low 12, between 5200 to 6200: A/F= mid 15.
I am running lean at high rpm i will send the ECU next week.

jturkel

hmm....i'm just looking to upgrade mine so it doesnt throw codes at 22psi......just in case i somehow end up running, idk, 23-24psi....somehow. just wondering if anyone has UPGRADED it to a larger MAP sensor (can read more than the stock one)

loungn14

adjustable map clamp....

Forza1

Perhaps the E55 or V12TT cars have a higher pressure MAP sensor...

Two BAR would be enough(29psi)

Lenin

The OEM sensor is rated at 0.2 up to 2.5 bar. This is about 36.23 PSI. Subtract from it 14.7 PSI at sea level and get max PSI reading of 21.53. So, you would need a minimum of a 3 bar sensor.

razormb

I went OEM -but the old part has been replaced with a new part (# above). The new one looks a little bit different but not sure if the internals were changed. The load limit problem is still there although not as frequent.

cruzinquick

Something like 240 is showing on this post?

Voltage Clamp

Lenin

This VC2 Clamp looks very interesting. It looks like the ECU may not need reprogramming and may stop activating boost related fault codes. Has anyone done this and how safe is it to run 22+ PSI boost?

c32used

looks interesting

ChicagoX

As long as the fueling maps are adequate, the VC-2 is a safe, reliable unit.

The problem is in the tuning. The end-user is not always the best individual to setup the unit.

hothbl

C32 AMG MAP SENSOR


This data is from http://www.maxparts.ru/index.php?pag...art_id=1644316

The spec. is 10 - 265 kpa (1.45 - 38.435 psi), but I don't think it is correct.

cruzinquick

x100, the 185 pulley and pulley stacking crowd on the srt6 are experiencing the same troubles as you guys. Too high boost and too high afr's. Everyone except BrianBrave with his tuning from SpeedInnovations, but he isn't running a NW intake. He has the SL55 intake which doesn't bring in the same air as the NW, and boost levels aren't as high. Which is the same as the C32 guys with a 185 pulley, they never reach max boost so no issues other than afr's if any. The good thing is they are working on it too. Until a 185 or stack pullied car beats me heads up on the 1/4 mile then I'll believe bigger is better. Datalog for safety.

mars3

Hello I have a problem on my 220 CDI, which does not exceed 3000 rpm and then stops the hen I accelerate there. Sensor fault diagnosis after rennet B28 if someone can send me a photo sensor to tell me his position in the engine thank you.

msl1

hi, my c32 wont start, for a change! any ideas where i could get a wiring diagram from for the rear sam?, think the problem may be there, the clip marked number 1 in the rear sam had somehow started to melt, but when i moved the wires around it started, but then nothing so i figured it must be a dodgy wire in the boot, i got a new clip and pins , chnged it , plugged it back in and it wont fire(Same problem as strart), so maybe the clip wasnt the problem, fuelpump doesnt prime, if you put a live to them they work?, and why did it work when i messed with the wiring, must be a problem in boot?, any help would be great as it is looking pretty grim at moment. cheers