P5 ECU + FM "Device" and still ping...

[smp3000]

I'm not quite sure what to do. Tonight my car was really running like crap. I'd floor it and it just felt weak. Then-everytime I'd get to 6 psi and go over 4K (esp in 2nd and 3rd) I'd hear the slight crackling again. The sound seems to come from the drivers side area. It never kicks in before 4K and never under 6psi of boost.

My FP is around 70.

I'm willing to wait until FM comes out with the reprogrammed ECU and bigger injectors, but what else can be done in the meantime?

I run 92 octane gas with octane booster at ever fillup and rarely even let the gas level get below 1/2 tank.

Bill @ FM isn't even sure if what I'm hearing is ping, but there's no sure way for me to tell. I'm guessing it is ping.

:mad: What do I do?

 

[MSPCanada]

Quick question. Why did you use an ECU from a P5?

 

[smp3000]

to retard the timing.... for turbo cars you don't want the advanced timing... The only difference betweenthe P5 ECU and the MP3 ECU is it's timing is advanced by two points, giving you an extra 5 HP.

now that just causes problems for turbo cars without a standalone feul management system or some other advanced timing control.

I was lucky to find a P5 owneer who was willing to swap ECU's.

 

[LinuxRacr]

Damn man, are you sure it ain't the damn boost gauge rattling? Cause I hear it rattling when I hit boost, as the needle shakes back and fourth a little. I also hear the woosh of air when boost hits. If it is comming from the driver's side, listen close to your boost gauge. At full boost, the wastegate is fighting the urge for more boost, and as a result, small adjustments are made in transition. The gauge rattles ad the needle wiggles up and down in small increments.

 

[Stou]

Reading this thread make me think to something. Maybe someone with more experience like Keith may tell us if I'm wrong with that.

Here it is. If there's pinging on an engine, this will activate the knock sensor. If there's a lot's of pinging, is it possible that the knock sensor activity throw some CEL. I saw on the OBDII chart that there's a few CEL codes associate with the knock sensor:

P0325 Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)
P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)
P0327 Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)
P0328 Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)
P0329 Knock Sensor 1 Circuit Intermittent (Bank 1 or Single Sensor)
P0330 Knock Sensor 2 Circuit Malfunction (Bank 2)
P0331 Knock Sensor 2 Circuit Range/Performance (Bank 2)
P0332 Knock Sensor 2 Circuit Low Input (Bank 2)
P0333 Knock Sensor 2 Circuit High Input (Bank 2)
P0334 Knock Sensor 2 Circuit Intermittent (Bank 2)

Major part of those code are associate with knock sensor malfunction but some of them like:

P0327 Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)
P0328 Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)

maybe associated to anormal knock sensor activity. If it's true and lot's of piging can throw a CEL which I'm realy not sure about that, this can tell us that this is not pinging that you ear on your car.

Like I told you, I'm realy not an expert about CEL, it's just something that came to me when I looked at the DTC chart for one of my CEL code!

 

[LinuxRacr]

That's good news because my friend has an OBD-II scanner, and scaned my ECU. No codes stored. (Except when I had the exhaust leak!)

 

[Stou]

LinuxRacr, even with your Turbo you don't have any codes???

I have 3 codes:

P0103 Mass or Volume Air Flow Circuit High Input
P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem
P0140 02 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)


I thought those codes was normal with a turbo....

The 'P0103 Mass or Volume Air Flow Circuit High Input' is kind of normal because the air flow is a lot higher than a NA car.

The 'P0106 Manifold Absolute Pressure/Barometric Pressure Circuit', I thought this was because the vaccum presure is higher than normal.

The 'P0140 02 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)'..... this one is probably because I tried so much things with my 2nd O2 to make a O2 cheater that maybe it is now in problem. This one I'll see if I can repair or simply buy another O2 sensor.

But I realy thought that those 2 codes related to air flow and presure was realy normal with a Turbo conversion..... and you don't have any of them?

 

[WShade]

Bill @ FM isn't even sure if what I'm hearing is ping, but there's no sure way for me to tell. I'm guessing it is ping.

:mad: What do I do?

Do me a favor. Take off all of the heat shielding, including the one on radiator. Bring the car to temp and listen. Its strange you are the only one with ping

 

[smp3000]

haha, Wshade- you and your heatsheild theories.

Actually-Linux brought something up that might be the problem. I don't have a mechanical boost guage like the one Corky sent out- I have an electronic one. All that means is that instead of the vaccum hose going straight to the guage itself-it goes to a sensor box under the hood and then a few wires go to the guage.

The sensor box is under the drivers side. It is possible that it is rattling at high boost. In a few mins I'm going to install my shifter bushings and tighten EVERY last clamp on my car. I will fasten down the sensor box and see what happens. I will post my findings in a few hours!

Thanks to all of you for your posts!

 

[LinuxRacr]

LinuxRacr, even with your Turbo you don't have any codes???

I have 3 codes:

P0103 Mass or Volume Air Flow Circuit High Input
P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem
P0140 02 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)


I thought those codes was normal with a turbo....

The 'P0103 Mass or Volume Air Flow Circuit High Input' is kind of normal because the air flow is a lot higher than a NA car.

The 'P0106 Manifold Absolute Pressure/Barometric Pressure Circuit', I thought this was because the vaccum presure is higher than normal.

The 'P0140 02 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)'..... this one is probably because I tried so much things with my 2nd O2 to make a O2 cheater that maybe it is now in problem. This one I'll see if I can repair or simply buy another O2 sensor.

But I realy thought that those 2 codes related to air flow and presure was realy normal with a Turbo conversion..... and you don't have any of them?

Those did not show up. I may have my s*** scanned again!

 

[Stou]

I erased the codes Friday and they are not back yet......

Let's see if other Turbo guys got some code or not?

 

[spoolinmp3]

Last time I checked on the obd scanner I was getting a code for cat malfunction.
I have also noticed that if I richen my mixture considerably I will misfire (alot) has anbody had this happen?? Stou?
Then I will get a blinking cell
But this only happens if I jack up fuel.

 

[LinuxRacr]

Last time I checked on the obd scanner I was getting a code for cat malfunction.
I have also noticed that if I richen my mixture considerably I will misfire (alot) has anbody had this happen?? Stou?
Then I will get a blinking cell
But this only happens if I jack up fuel.

Damn, a blinking CEL would scare the s*** out of me!! The last time I saw one of those, my engine was toast!

 

[PortCityMP3]

Re: Re: P5 ECU + FM "Device" and still ping...

Do me a favor. Take off all of the heat shielding, including the one on radiator. Bring the car to temp and listen. Its strange you are the only one with ping

He is not the only one with ping I did the p5 ecu swap and still had ping

I have the O2 device and I still have ping.

It doesn't do it at partial throttle right?
the fuel pressure goes up fine at partial but at full its slow and mine doesn't get past 63 in 2nd gear.

thats another thing my FP differs from gear to gear does yours?

 

[smp3000]

Yessir, you are correct there. I don't hear anything at partial throttle... It's at full and only in 3rd gear +... I don't really have numbers for my FP at certain gears. I can't see the guage when driving and I'd need someone to watch it for me while we drive.

Until FM can get that repgrogrammed ECU and bigger injectors, I think we'll just have to sit tight.

I'm just so unsure if it's ping or not. Regardless, it shouldn't be there. If it gets anymore ridiculous I think I'll try and record it, although it's very faint.

 

[WShade]

My fuel pressure does not change that drastically from gear to gear at full throttle. When we installed that second fuel pump I had to turn it down from the 90 range to 75 - 80. It maintains a constant 75 - 80 at full throttle in all gears. I have noticed a little bleed down from time to time. It will spike 85 - 90 and slowly come down to 75 - 80.

 

[Stou]

Spoolin, I don't have misfire problem, even if I richen the mixture. Maybe because I still have the advance timing.....

And for the cat malfunction, I don't have cat anymore but no cat malfunction code. But my "O2 Sensor (#2) no activity detected" is kind of strange. When I'll get some spare time, I'll check for that second O2.

But why I have "MAF circuit high input" and you don't

Is everybody got the MAF sensor before the Turbo?

About those pinging, PortCityMP3 and smp3000, when the pinging happen, what do you see on your A/F gauge, is it lean?

 

[spoolinmp3]

smp300 get an EGT gauge and really find out whats going on with your a/f ratios.

 

[smp3000]

Already got one bro.. Just haven't installed it. I'll b taking everything off and installing it this next weekend. Then I'll let you guys know for sure. So we can get to the bottom of this!

 

[spoolinmp3]

Already got one bro.. Just haven't installed it. I'll b taking everything off and installing it this next weekend. Then I'll let you guys know for sure. So we can get to the bottom of this!

Sounds like a plan! Where do you plan on mounting the probe. Is the gauge in celsius or F?