NefMoto

Hi,

I've nearly finished my build but have the final bit of the hardware jigsaw to complete, I'm using a 3 inch MAF from an APX engine car (I believe according to part number VW pn 06A906461E, Bosch pn 0280218034). It runs terrible with the MAF plugged in but not sure where to point the finger? I know it will need rescaling either way but if there's a problem with it, it will need replacing? I'm still learning the tuning stuff! Been running it about unplugged but need to sort this obviously. Hardware is as follows currently:
ARZ engine, standard tune bar immo off at the moment, TD05 18g turbo, tubular mani, no cat, 3 inch downpipe and exhaust then goes to 2.5, standard injectors and FPR currently, 3 inch TIP and MAF. All in a MK2 Golf 1990. If anyone needs any more info please ask. Got a csv which is attached, started log with MAF plugged in then halfway though unplugged it. Can anyone help confirm please? Many thanks in advance.

codes? ltft? stft?

Not going to be able to diag much without ME7Logger either.

Thanks for speedy response nyet,


13 Faults Found:
18010 - Power Supply Terminal 30
           P1602 - 35-10 - Voltage too Low - Intermittent
18044 - Powertrain Data Bus
           P1636 - 35-00 - Missing Message from Airbag Controller
17526 - Oxygen (Lambda) Sensor Heating; B1 S2
           P1118 - 35-00 - Open Circuit
18057 - Powertrain Data Bus
           P1649 - 35-10 - Missing Message from ABS Controller - Intermittent
16486 - Mass Air Flow Sensor (G70)
           P0102 - 35-00 - Signal too Low
17524 - Oxygen (Lambda) Sensor Heating; B1 S1
           P1116 - 35-00 - Open Circuit
16518 - Oxygen (Lambda) Sensor B1 S1
           P0134 - 35-00 - No Activity
16955 - Brake Switch (F)
           P0571 - 35-00 - Implausible Signal
16502 - Engine Coolant Temp. Sensor (G62)
           P0118 - 35-10 - Signal too High - Intermittent
17522 - Oxygen (Lambda) Sensor; B1 S2
           P1114 - 35-00 - Internal Resistance too High
17834 - EVAP Purge Valve (N80)
           P1426 - 35-00 - Open Circuit
16524 - Oxygen (Lambda) Sensor B1 S2
           P0140 - 35-00 - No Activity
16885 - Vehicle Speed Sensor
           P0501 - 35-00 - Implausible Signal

I'll have to come back to you with me7logger, does me7logger capture those trims as default?

So you think your car is mechanically ok, given those faults? And the problem is your tune?

As mentioned this is a conversion into an earlier 1990 car so no ABS, no airbag, not using mk4 golf clocks, no cat, the n80 I unplugged, now plugged back in so that fault does not throw now. These will be all coded out. I would expect to see these given the circumstances. The power supply one is historical from when the battery was low I believe.
Fair play on the lambda faults but I was not sure if they appear because of the possible MAF issue. Or simply because it has been unplugged?
I was hoping someone might spot something obvious in the log to narrow it down, that is all.
I'll go get my hands dirty...

Yea go back to a stock maf until you rescale for what you have.
With stuff like this its my opinion that you should use stock until the hardware is sorted,
unless you are useing a protuner.
What i mean is the car should be able to run idle and drive around no boost long enough
for ltft to adapt. maybe 20min part thottle slow driving. Then with no unexected faults and
all else good you can start changing things.

Easy 250hp set up is using k04 turbo, injectors, MAF & map - ESKONF out the parts delete - you'll get instrument cluster problems etc but still work fine!

If you've upgraded to an HPX then you need to mod MLHFM but once you do that and being the main air sampling point it seems a bit too much work for a finite amount of hp on 18G stock injectors!

How much performance you want?

https://www.youtube.com/watch?v=cH56wKVCoV8

17524 - Oxygen (Lambda) Sensor Heating; B1 S1
           P1116 - 35-00 - Open Circuit

16518 - Oxygen (Lambda) Sensor B1 S1
           P0134 - 35-00 - No Activity

16502 - Engine Coolant Temp. Sensor (G62)
           P0118 - 35-10 - Signal too High - Intermittent

These need to be resolved first. The rest can be easily coded out. Second putting a stock MAF housing in for now.

Thanks guys, I'll check the lambda. Don't have the original MAF unfortunately

16885 - Vehicle Speed Sensor
           P0501 - 35-00 - Implausible Signal

This one needs vss signal from mk2 clocks connected to ECU also

I'm guessing this is US and here not all clusters have vss out. But anyhow you are right he can
put a vss on the cluster out for cruise and use that signal for the ecu vss.

It's not just for cruise, any cluster with an mfa should have vss out an though there may not be a wire in the plug for it.

This is good to know, thanks. I'm guessing this is on the MFA wiring plug, think it's green?

Just had a look at this and if it helps anyone else, from the MK2 clocks VSS goes W/1 on the CE2 fusebox, connect this to the T10 orange 10 pin connector, pin 6 blue/white wire on the MK4 loom.

Good one problem down, now front 02?

We've done about half a dozen of these and usually it's wiring problems, even using custom looms and told how to wire it by the bloke that made the loom was wrong! At least for the temp sensor... I tend to stay away from wiring if I can but it can be a pain on these with the mish-mash of parts, plenty of trial and error first times around and depending on set up!

Some screenshots to hunt down ESKONF and the MLHFM various top end figures may help for the deletes and re-scales though to get you started? Can't check your files or sort you the full MLHFM scales at the moment though, getting blue screen of death!  :-\

Been looking into the Lambda errors. I was reluctant to go straight out and throw cash at a new one and appears my gut instinct was correct, thanks for the info RBPE!
After googling a bit, forums tell me the front lambda should read 4 ohms across pins 3 and 4 when cold. Yet to check it.

The coolant sensor has just been swapped for the appropriate one which works with both the ecu and the MK2 clocks, i'll do a fresh scan and take it from there.

Thanks again

Think the front lambda is sorted after replacing with a new one, codes I get now are:

5 Faults Found:
18044 - Powertrain Data Bus
           P1636 - 35-00 - Missing Message from Airbag Controller
17526 - Oxygen (Lambda) Sensor Heating; B1 S2
           P1118 - 35-00 - Open Circuit
18057 - Powertrain Data Bus
           P1649 - 35-10 - Missing Message from ABS Controller - Intermittent
17522 - Oxygen (Lambda) Sensor; B1 S2
           P1114 - 35-00 - Internal Resistance too High
16524 - Oxygen (Lambda) Sensor B1 S2
           P0140 - 35-00 - No Activity

Everythings plugged in and runs ok.

So I think I'm in the clear as these can be coded out now.

I'm happy that I found ESKONF and have edited my file to remove N80 as a first step but I can't save it because I think I'm using the WinOLS test version. I'm trying with Tuner Pro now.