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Author Topic: Loss of PSI - fixed + update!!  (Read 4634 times)

Offline Rob Zombie

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Loss of PSI - fixed + update!!
« on: 20 December 2012, 08:49 »
Hello Guys,

I've just noticed a small loss of PSI on my mk4.

It used to peak at 19 - 20 and sit @ 15 psi however yesterday I noticed it only peaked at 15 and drops to 10-12...

I'm a little concerned.... The car has the ECS N75 valve on.. can anyone think of any reasons why it would suddenly drop PSI?

Would it be due to the weather etc?

Cheers

« Last Edit: 05 January 2013, 20:09 by Rob Zombie »
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Performance mods: Revo stage 2 map, 5 Peice Hose Kit & TIP, Evoloution Motorsport Air Filter, N249 by-pass, Forge spliter valve, ECS N75 Valve, KW 50mm springs &shocks, Front & Rear Eiabach ARB, Full Milltek Turbo back exhaust.
 
BHP: 231
TRQ: 251.7 lb-ft

Offline Rob Zombie

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Re: Loss of PSI
« Reply #1 on: 20 December 2012, 09:56 »
Just been on the phone to Storm Developments. i told him both ym ABS and Traction Control lights popped on the other day and he said it sounds liek the MAF is faulty. He's advised to unplug the MAF and see if the car boosts back to it's original reading of 20 psi.

If not i'll have to get it down to Storms so they can plug her in.... :sad:
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Performance mods: Revo stage 2 map, 5 Peice Hose Kit & TIP, Evoloution Motorsport Air Filter, N249 by-pass, Forge spliter valve, ECS N75 Valve, KW 50mm springs &shocks, Front & Rear Eiabach ARB, Full Milltek Turbo back exhaust.
 
BHP: 231
TRQ: 251.7 lb-ft

Offline Wazzzer

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Re: Loss of PSI
« Reply #2 on: 20 December 2012, 11:50 »
If you run with the MAF sensor unplugged it won't hit any more than about 6psi as it will run on set "get you home" values
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1999 1.8T: R-Tech remap - 225bhp/256lb/ft : K03s : THS FMIC : THS PCR pipe : 2.5" stainless exhaust : THS FR3 Engine mounts : G60/VR6 clutch : Calibra Yellow injectors : VR6 MAF : Devils Own WMI : Forge 007p : Carbonio CAI : Leon Cupra R Brembos : FK AK Street coilovers : Votex skirts : Anniversary front : click ---> http://www.golfgtiforum.co.uk/index.php?topic=92175

Offline Rob Zombie

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Re: Loss of PSI
« Reply #3 on: 20 December 2012, 12:08 »
oh right... I was told by Carl from Revo and the fella from Storm to unplug the MAF...

what's the quickest way of seeing if it's the MAF - I'm due to take it to "The Phirm" tomorrow if nothing comes of this...
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Performance mods: Revo stage 2 map, 5 Peice Hose Kit & TIP, Evoloution Motorsport Air Filter, N249 by-pass, Forge spliter valve, ECS N75 Valve, KW 50mm springs &shocks, Front & Rear Eiabach ARB, Full Milltek Turbo back exhaust.
 
BHP: 231
TRQ: 251.7 lb-ft

Offline Wazzzer

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Re: Loss of PSI
« Reply #4 on: 20 December 2012, 13:36 »
VAG COM is the only way really, you can compare requested and actual boost values then
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1999 1.8T: R-Tech remap - 225bhp/256lb/ft : K03s : THS FMIC : THS PCR pipe : 2.5" stainless exhaust : THS FR3 Engine mounts : G60/VR6 clutch : Calibra Yellow injectors : VR6 MAF : Devils Own WMI : Forge 007p : Carbonio CAI : Leon Cupra R Brembos : FK AK Street coilovers : Votex skirts : Anniversary front : click ---> http://www.golfgtiforum.co.uk/index.php?topic=92175

Offline Rob Zombie

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Re: Loss of PSI
« Reply #5 on: 20 December 2012, 13:42 »
okay mate - thanks for that.  I'm taking it to "the Phirm" in Hartly, hopefully they can diagnose the problem.

I've heared a lot of people saying the ECS n75 valves are no good - might be worth swapping for a standard valve do you think?
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Performance mods: Revo stage 2 map, 5 Peice Hose Kit & TIP, Evoloution Motorsport Air Filter, N249 by-pass, Forge spliter valve, ECS N75 Valve, KW 50mm springs &shocks, Front & Rear Eiabach ARB, Full Milltek Turbo back exhaust.
 
BHP: 231
TRQ: 251.7 lb-ft

Offline Wazzzer

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Re: Loss of PSI
« Reply #6 on: 20 December 2012, 13:51 »
Might be worth a go. Has it happened since you fitted the valve?
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1999 1.8T: R-Tech remap - 225bhp/256lb/ft : K03s : THS FMIC : THS PCR pipe : 2.5" stainless exhaust : THS FR3 Engine mounts : G60/VR6 clutch : Calibra Yellow injectors : VR6 MAF : Devils Own WMI : Forge 007p : Carbonio CAI : Leon Cupra R Brembos : FK AK Street coilovers : Votex skirts : Anniversary front : click ---> http://www.golfgtiforum.co.uk/index.php?topic=92175

Offline Rob Zombie

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Re: Loss of PSI
« Reply #7 on: 20 December 2012, 14:04 »
I purchased the car with the valve already on. The fella said it boosted his initial boost peak by 3 psi.

I hadboth the ABs and TC light come on the other day that i've read do indicate the MAF is on it's way out. They ahve now gone out then - but this problem has only occured since yesterday - like someone has remvoed the stage 2 remap completly.

So remvoing the MAF plug won't really help me out at all?
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Performance mods: Revo stage 2 map, 5 Peice Hose Kit & TIP, Evoloution Motorsport Air Filter, N249 by-pass, Forge spliter valve, ECS N75 Valve, KW 50mm springs &shocks, Front & Rear Eiabach ARB, Full Milltek Turbo back exhaust.
 
BHP: 231
TRQ: 251.7 lb-ft

Offline Wazzzer

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Re: Loss of PSI
« Reply #8 on: 20 December 2012, 14:06 »
Usually taking the plug off is a way of testing the MAF if it's running really lumpy etc. In your case I think the only real way to see what's happening is some real time logs on VAG COM. MAF and boost values would be a good place to start
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1999 1.8T: R-Tech remap - 225bhp/256lb/ft : K03s : THS FMIC : THS PCR pipe : 2.5" stainless exhaust : THS FR3 Engine mounts : G60/VR6 clutch : Calibra Yellow injectors : VR6 MAF : Devils Own WMI : Forge 007p : Carbonio CAI : Leon Cupra R Brembos : FK AK Street coilovers : Votex skirts : Anniversary front : click ---> http://www.golfgtiforum.co.uk/index.php?topic=92175

Offline Rob Zombie

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Re: Loss of PSI
« Reply #9 on: 20 December 2012, 14:37 »
Yeah your probably right... i wonder if they have VAG COM at The Phirm - Being a VW performance center i'd hope so lol!!
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Performance mods: Revo stage 2 map, 5 Peice Hose Kit & TIP, Evoloution Motorsport Air Filter, N249 by-pass, Forge spliter valve, ECS N75 Valve, KW 50mm springs &shocks, Front & Rear Eiabach ARB, Full Milltek Turbo back exhaust.
 
BHP: 231
TRQ: 251.7 lb-ft

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