2L 8v mp9 idling problem

User avatar
Benitovw
Cadet
Posts: 201
Registered for: 12 years 9 months
Car Make: vw
Car Model: CITI ADY
Membership No: missing
Location: Cape town

2L 8v mp9 idling problem

Post by Benitovw »

A friend of mine says so five times a month his caddy with 2l 8v mp9 with 276 cam an polocup ecu the idling goes crazy the car idles hire then next its very low then he must disconnect the battery to reset the ecu then the idling is normal again, what could cause this problem?
Thanks guys
CITI 2L 8V
User avatar
Benitovw
Cadet
Posts: 201
Registered for: 12 years 9 months
Car Make: vw
Car Model: CITI ADY
Membership No: missing
Location: Cape town

Re: 2L 8v mp9 idling problem

Post by Benitovw »

Not "hire" higher sorry
CITI 2L 8V
User avatar
panic-mechanic
Panic's Place
Posts: 26715
Registered for: 21 years 7 months
Membership No: 79
Location: Benoni, putfontein.

Re: 2L 8v mp9 idling problem

Post by panic-mechanic »

mp9 + cam is always an issue, The idle motor takes huge strain. He'll most likely have to change the throttlebody soon. In the mean time drill a 3 mm hole into the throttle plate and see if it helps. Also get the throttle body recalibrated and faults cleared.
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
User avatar
Benitovw
Cadet
Posts: 201
Registered for: 12 years 9 months
Car Make: vw
Car Model: CITI ADY
Membership No: missing
Location: Cape town

Re: 2L 8v mp9 idling problem

Post by Benitovw »

Thanx for the advice panic
CITI 2L 8V
User avatar
CRASH_IT
Cadet
Posts: 996
Registered for: 17 years 6 months
Car Make: Audi
Car Model: 8P S3
Membership No: 1540
Location: Alberton, JHB

Re: 2L 8v mp9 idling problem

Post by CRASH_IT »

Sorry but I have someone with same problem! std 2.0 x-flow in a polo running mp9, Car idles at 1500 all the time. changed map sensor, TB, and calibration done and cleared faults. He has a plastic in take so we pulled it off and made sure it was sealed everywhere, found a little hole and sealed it shut still keeps revs high. driven it for about 60km and nothing changed. Also car is quite heavy on fuel, +/- 400km to a tank.
It had a 272 cam in after removing it and putting a std map on ecu this problem accured.
CURRENT RIDE
2013 VW transporter 2.0TDI
2007 Audi S3

EX
- 2014 Ford Fiesta ST
- 1993 1.8i CITI MP9 98HP 147NM @ KAR
NOW:2.0 ABF 117HP 158NM @Panics on XMS (SOLD)SNIFF
http://www.vwclub.co.za/phpbb3/viewtopi ... 3&t=108203
Image
User avatar
pluto
Lieutenant
Posts: 1650
Registered for: 20 years 6 months

Re: 2L 8v mp9 idling problem

Post by pluto »

CRASH_IT wrote:Sorry but I have someone with same problem! std 2.0 x-flow in a polo running mp9, Car idles at 1500 all the time. changed map sensor, TB, and calibration done and cleared faults. He has a plastic in take so we pulled it off and made sure it was sealed everywhere, found a little hole and sealed it shut still keeps revs high. driven it for about 60km and nothing changed. Also car is quite heavy on fuel, +/- 400km to a tank.
It had a 272 cam in after removing it and putting a std map on ecu this problem accured.
It could be a whole host of issues or one simple issue ..

Easy to sort out if the car is in hand tho .
Shiver me Wastegates

Frieling Racing Chip tuning

Yashin@frc.co.za
082 805 9060
2013 TT-RS S Tronic
MK1 20VT BAM (Motronic ME 7.5 DBW)
User avatar
CRASH_IT
Cadet
Posts: 996
Registered for: 17 years 6 months
Car Make: Audi
Car Model: 8P S3
Membership No: 1540
Location: Alberton, JHB

Re: 2L 8v mp9 idling problem

Post by CRASH_IT »

pluto wrote:
CRASH_IT wrote:Sorry but I have someone with same problem! std 2.0 x-flow in a polo running mp9, Car idles at 1500 all the time. changed map sensor, TB, and calibration done and cleared faults. He has a plastic in take so we pulled it off and made sure it was sealed everywhere, found a little hole and sealed it shut still keeps revs high. driven it for about 60km and nothing changed. Also car is quite heavy on fuel, +/- 400km to a tank.
It had a 272 cam in after removing it and putting a std map on ecu this problem accured.
It could be a whole host of issues or one simple issue ..

Easy to sort out if the car is in hand tho .
Could you list a few to look for?
CURRENT RIDE
2013 VW transporter 2.0TDI
2007 Audi S3

EX
- 2014 Ford Fiesta ST
- 1993 1.8i CITI MP9 98HP 147NM @ KAR
NOW:2.0 ABF 117HP 158NM @Panics on XMS (SOLD)SNIFF
http://www.vwclub.co.za/phpbb3/viewtopi ... 3&t=108203
Image
Wit Ark
Lieutenant
Posts: 1440
Registered for: 14 years 11 months
Car Make: VW
Car Model: Citi Chico baby dragster
Membership No: missing
Location: Namibia
Contact:

Re: 2L 8v mp9 idling problem

Post by Wit Ark »

Faulty throttle for starters, leak on intake manifold or where intake manifold bolts onto head oar throttle body, possibly even a leak on the throttle body, faulty water temp sender unit, i dont know if car has a warmer valve/diferter valve fitted, but this can cause the same symptoms.
2.0i ADY. 90.2kW & 198.1Nm atw excl. 50Horses VAT 13.9980sec @ OKH nationals 7/4/2012
clinton-mk2
Enlisted
Posts: 16
Registered for: 12 years 9 months

Re: 2L 8v mp9 idling problem

Post by clinton-mk2 »

I'm running the same ecu it happens to me about twice a month an then I just take terminals off an put back again. Its not the TB though as I don't use tps mines plugged out an I use a idle screw..
User avatar
poloplayaWP
Captain
Posts: 2576
Registered for: 14 years 4 months
Car Make: VW
Car Model: 9n 1.9 TDI Sportline
Membership No: missing
Location: Cape Town

Re: 2L 8v mp9 idling problem

Post by poloplayaWP »

Benitovw wrote:A friend of mine says so five times a month his caddy with 2l 8v mp9 with 276 cam an polocup ecu the idling goes crazy the car idles hire then next its very low then he must disconnect the battery to reset the ecu then the idling is normal again, what could cause this problem?
Thanks guys
Hi benito,i can run a vag com scan on ya buddy's car which+wil+point him in right direction and do the calibration.my number is 0834153072 or mail me grant@syntell.net

2014 VW Golf VII GTI DSG
2009 Ford Bantam 1.3 Rocam
2008 CRG Road Rebel Shifter with TM Racing 125cc 2 Stroke 6 Speed Sequential


ex 2011 VW 6R Polo GTI
ex 2005 Polo 1.9 TDI Sportline
ex 1978 Beetle 1.6 Twinport
ex 1998 Original VW Motorsport Polo Classic 2.0 8v
ex 1984 Golf 1.3
ex 1998 Polo Playa 1.6>2.0
ex 1989 Ford Bantam 1.6
ex 2007 Nissan 1400
User avatar
amstel18
Lieutenant-Colonel
Posts: 4834
Registered for: 16 years 3 months
Car Make: VW
Car Model: Tiguan Allspace
Membership No: missing
Location: Brackenfell, Cape Town

Re: 2L 8v mp9 idling problem

Post by amstel18 »

CRASH_IT wrote:Sorry but I have someone with same problem! std 2.0 x-flow in a polo running mp9, Car idles at 1500 all the time. changed map sensor, TB, and calibration done and cleared faults. He has a plastic in take so we pulled it off and made sure it was sealed everywhere, found a little hole and sealed it shut still keeps revs high. driven it for about 60km and nothing changed. Also car is quite heavy on fuel, +/- 400km to a tank.
It had a 272 cam in after removing it and putting a std map on ecu this problem accured.
You sure a hole wasn't drilled in the TB to aid idling when it still had the cam in?

Might want to have a look
Current:
2022 GWM P-Series LT 4x4
Ex:
2018 VW Tiguan Allspace
2013 Audi A3 Sportback 1.8 TFSI S-Tronic
2015 Pure White 1.2tsi Comfortline
2011 2L BiTdi ROK D/C Highline
2006 Seat Ibiza Cupra TDI
91 Caddy, ADY motor on mp9, wildcat 4-1 branch and 50mm Evolution s/s exhaust
96 1600 Chico (sold)
User avatar
CRASH_IT
Cadet
Posts: 996
Registered for: 17 years 6 months
Car Make: Audi
Car Model: 8P S3
Membership No: 1540
Location: Alberton, JHB

Re: 2L 8v mp9 idling problem

Post by CRASH_IT »

I checked for that and also put another TB that I had onto car. Same problem!
CURRENT RIDE
2013 VW transporter 2.0TDI
2007 Audi S3

EX
- 2014 Ford Fiesta ST
- 1993 1.8i CITI MP9 98HP 147NM @ KAR
NOW:2.0 ABF 117HP 158NM @Panics on XMS (SOLD)SNIFF
http://www.vwclub.co.za/phpbb3/viewtopi ... 3&t=108203
Image
User avatar
amstel18
Lieutenant-Colonel
Posts: 4834
Registered for: 16 years 3 months
Car Make: VW
Car Model: Tiguan Allspace
Membership No: missing
Location: Brackenfell, Cape Town

Re: 2L 8v mp9 idling problem

Post by amstel18 »

Did you have the new TB adapted? Might be that the ecu didn't notice the new TB.

But this is starting to sound more like a vacuum leak. Put your hand infront of the tb and if it doesn't suck very hard, then theres a leak.

It will keep idling as it is now if you block the tb
Current:
2022 GWM P-Series LT 4x4
Ex:
2018 VW Tiguan Allspace
2013 Audi A3 Sportback 1.8 TFSI S-Tronic
2015 Pure White 1.2tsi Comfortline
2011 2L BiTdi ROK D/C Highline
2006 Seat Ibiza Cupra TDI
91 Caddy, ADY motor on mp9, wildcat 4-1 branch and 50mm Evolution s/s exhaust
96 1600 Chico (sold)
User avatar
panic-mechanic
Panic's Place
Posts: 26715
Registered for: 21 years 7 months
Membership No: 79
Location: Benoni, putfontein.

Re: 2L 8v mp9 idling problem

Post by panic-mechanic »

Could also be totally different like a broken wire in the harness to the TB.
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
Torker
General
Posts: 9591
Registered for: 18 years
Car Make: VW
Car Model: Golf GT
Membership No: 1464
Location: Springs

Re: 2L 8v mp9 idling problem

Post by Torker »

panic-mechanic wrote:Could also be totally different like a broken wire in the harness to the TB.
Ditto, see attached thread - he found two broken wires when he traced out his wiring harness using the diagram:

http://www.vwclub.co.za/phpbb3/viewtopi ... 3&t=123639
Current rides:

VW Golf - 83 GT 2.1 16V 2-door with throttles
VW Golf - 78 LS 2.0 8V 4-door (2.1 ABF with throttles in progress)
VW Golf - '08 Citi Storm - 1.4 for now
Hyundai - 1.4 Getz (daily)
User avatar
poloplayaWP
Captain
Posts: 2576
Registered for: 14 years 4 months
Car Make: VW
Car Model: 9n 1.9 TDI Sportline
Membership No: missing
Location: Cape Town

Re: 2L 8v mp9 idling problem

Post by poloplayaWP »

Like I said a scan will answer all just let me know.also like amstle said you can't just swap tb's without adaption but then again could be the faulty wires

2014 VW Golf VII GTI DSG
2009 Ford Bantam 1.3 Rocam
2008 CRG Road Rebel Shifter with TM Racing 125cc 2 Stroke 6 Speed Sequential


ex 2011 VW 6R Polo GTI
ex 2005 Polo 1.9 TDI Sportline
ex 1978 Beetle 1.6 Twinport
ex 1998 Original VW Motorsport Polo Classic 2.0 8v
ex 1984 Golf 1.3
ex 1998 Polo Playa 1.6>2.0
ex 1989 Ford Bantam 1.6
ex 2007 Nissan 1400
User avatar
pluto
Lieutenant
Posts: 1650
Registered for: 20 years 6 months

Re: 2L 8v mp9 idling problem

Post by pluto »

poloplayaWP wrote:Like I said a scan will answer all just let me know.also like amstle said you can't just swap tb's without adaption but then again could be the faulty wires

Nope , scan's tell you jack squat sometimes .Just depends on the level of hardware and the functionality of the ECU.
Shiver me Wastegates

Frieling Racing Chip tuning

Yashin@frc.co.za
082 805 9060
2013 TT-RS S Tronic
MK1 20VT BAM (Motronic ME 7.5 DBW)
User avatar
panic-mechanic
Panic's Place
Posts: 26715
Registered for: 21 years 7 months
Membership No: 79
Location: Benoni, putfontein.

Re: 2L 8v mp9 idling problem

Post by panic-mechanic »

Yup. Very few managements can or does test anything on the output side of things. Mp9 certainly check almost nothing on the outputs.
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
User avatar
poloplayaWP
Captain
Posts: 2576
Registered for: 14 years 4 months
Car Make: VW
Car Model: 9n 1.9 TDI Sportline
Membership No: missing
Location: Cape Town

Re: 2L 8v mp9 idling problem

Post by poloplayaWP »

panic-mechanic wrote:Yup. Very few managements can or does test anything on the output side of things. Mp9 certainly check almost nothing on the outputs.
It will how ever give you an error when connecting to the throttle body if there was a faulty cable in the loom or plug.

2014 VW Golf VII GTI DSG
2009 Ford Bantam 1.3 Rocam
2008 CRG Road Rebel Shifter with TM Racing 125cc 2 Stroke 6 Speed Sequential


ex 2011 VW 6R Polo GTI
ex 2005 Polo 1.9 TDI Sportline
ex 1978 Beetle 1.6 Twinport
ex 1998 Original VW Motorsport Polo Classic 2.0 8v
ex 1984 Golf 1.3
ex 1998 Polo Playa 1.6>2.0
ex 1989 Ford Bantam 1.6
ex 2007 Nissan 1400
User avatar
panic-mechanic
Panic's Place
Posts: 26715
Registered for: 21 years 7 months
Membership No: 79
Location: Benoni, putfontein.

Re: 2L 8v mp9 idling problem

Post by panic-mechanic »

You will still not know if it is a dead TB or a broken wire......
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
User avatar
pluto
Lieutenant
Posts: 1650
Registered for: 20 years 6 months

Re: 2L 8v mp9 idling problem

Post by pluto »

poloplayaWP wrote:
panic-mechanic wrote:Yup. Very few managements can or does test anything on the output side of things. Mp9 certainly check almost nothing on the outputs.
It will how ever give you an error when connecting to the throttle body if there was a faulty cable in the loom or plug.
No , not always. It depends which input or out put is measured to checked for a timed response.
Shiver me Wastegates

Frieling Racing Chip tuning

Yashin@frc.co.za
082 805 9060
2013 TT-RS S Tronic
MK1 20VT BAM (Motronic ME 7.5 DBW)
Baldwin02002
Cadet
Posts: 356
Registered for: 15 years 7 months
Car Make: VW
Car Model: Mk2 GTS
Membership No: missing
Location: Mulbarton

Re: 2L 8v mp9 idling problem

Post by Baldwin02002 »

Hi, there is couple of things that might be causing this. I once had the same problem with one of my customers. The idling was bad and the TB could not be adapted. Only to find out that an accelerator cable adjustment was too tight on the TB. I had to loosen it a bit so that the TPS motor can run a test on the TB when you switch on the engine and that is an ADP RUN. Then i could run an Adaptation and the problem was resolved. But clear all the errors first so that new errors could be registered.

If the above is not an issue he needs to go to Engine adaption before doing anything to monitor TB angle and manifold pressure, enter 00 then save the adaption to reset all the engine devices to the defaults. Then measure groups. He should check the TB angle. I think on idle it should be on +-6 degrees and it should show 880 or 920 rpm which is normal on MP9. Then he should also check the manifold pressure if it is on the same level. I can’t remember the actual value on the pressure as it depends on the engine size.

Let the car idle until the cooling fan turns. Groups to monitor this shoud be between 0 and 20. The timing angle should read 6.5 degrees. Rev the engine and check if the TB angle will go down to the right idling degrees. Also monitor the manifold pressure to check if it will rise and go back to the right idling manifold pressure. If the manifold pressure is giving you different values it might be a leak or the throttle body. If the TB angles are changing constatly it should also be changed. Run TB adaption to see if it will fail before changing the TB. Also monitor inlet manifold temperature and the coolant temperature. TB adaptation adaptation group is 98 on MP9 and 60 on most newer cars.

Hope this will help....
Current:
Mk2 GTS 1.8 --> 2.0 16v MP9 --> Soon to be 2.1 16v MP9 with Throttles
S3 2003 BAM --> Stage 1 with full Exhaust
S4 2004 --> Stock
A3 2010 1.8T Cabrio --> Stock
//////
Previous
Golf Citi 2.0 8v MP9 2007
Jetta 4 V5 10V
Honda CB400 '74
User avatar
poloplayaWP
Captain
Posts: 2576
Registered for: 14 years 4 months
Car Make: VW
Car Model: 9n 1.9 TDI Sportline
Membership No: missing
Location: Cape Town

Re: 2L 8v mp9 idling problem

Post by poloplayaWP »

Baldwin02002 wrote:
Let the car idle until the cooling fan turns. Groups to monitor this shoud be between 0 and 20. The timing angle should read 6.5 degrees. Rev the engine and check if the TB angle will go down to the right idling degrees. Also monitor the manifold pressure to check if it will rise and go back to the right idling manifold pressure. If the manifold pressure is giving you different values it might be a leak or the throttle body. If the TB angles are changing constatly it should also be changed. Run TB adaption to see if it will fail before changing the TB. Also monitor inlet manifold temperature and the coolant temperature. TB adaptation adaptation group is 98 on MP9 and 60 on most newer cars.

Hope this will help....
This is exactly what I would have done.

2014 VW Golf VII GTI DSG
2009 Ford Bantam 1.3 Rocam
2008 CRG Road Rebel Shifter with TM Racing 125cc 2 Stroke 6 Speed Sequential


ex 2011 VW 6R Polo GTI
ex 2005 Polo 1.9 TDI Sportline
ex 1978 Beetle 1.6 Twinport
ex 1998 Original VW Motorsport Polo Classic 2.0 8v
ex 1984 Golf 1.3
ex 1998 Polo Playa 1.6>2.0
ex 1989 Ford Bantam 1.6
ex 2007 Nissan 1400
UDC
Colonel
Posts: 5738
Registered for: 17 years 2 months
Membership No: 1041
Location: Durban

Re: 2L 8v mp9 idling problem

Post by UDC »

where does one get more of those group codes i.e coolant temp, intake temp etc
User avatar
poloplayaWP
Captain
Posts: 2576
Registered for: 14 years 4 months
Car Make: VW
Car Model: 9n 1.9 TDI Sportline
Membership No: missing
Location: Cape Town

Re: 2L 8v mp9 idling problem

Post by poloplayaWP »

UDC wrote:where does one get more of those group codes i.e coolant temp, intake temp etc
http://wiki.ross-tech.com/wiki/index.ph ... ault_Codes

2014 VW Golf VII GTI DSG
2009 Ford Bantam 1.3 Rocam
2008 CRG Road Rebel Shifter with TM Racing 125cc 2 Stroke 6 Speed Sequential


ex 2011 VW 6R Polo GTI
ex 2005 Polo 1.9 TDI Sportline
ex 1978 Beetle 1.6 Twinport
ex 1998 Original VW Motorsport Polo Classic 2.0 8v
ex 1984 Golf 1.3
ex 1998 Polo Playa 1.6>2.0
ex 1989 Ford Bantam 1.6
ex 2007 Nissan 1400
Post Reply