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Author Topic: rather loud bang/pop worried  (Read 5205 times)

Offline davemk4

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rather loud bang/pop worried
« on: 11 July 2013, 10:20 »
2001 AUM...... out of blue today just put alittle hard push in 1st andvon gear change made a huge pop back fire sound alittle  smoke but car drives 100% spot on no engine lights nothing . Previous to this i have had odd pops from 1st to 2nd really mild though. All boost is fine no odd sounds any ideas? Bad map?
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline GTi_James

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Re: rather loud bang/pop worried
« Reply #1 on: 11 July 2013, 10:57 »
mine done this today and with erratic idle :undecided:

smoothed out a little after a bit of motor way driving but my boost gauge needle drops and rises whilst idling :sad:
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Mk4 Golf 1.8t AUM, Wintersports Addition. PiperX panel filter, 008p Forge DV, Toyosports DP 3", Miltek Anni Style CatBack non resonated, APR Sport CAT 200Cell, Catch Can RS4 Reps 18s, OEM R32 front and OEM

Offline Perryd84

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Re: rather loud bang/pop worried
« Reply #2 on: 11 July 2013, 13:14 »
I have the same problem but happens when I brake hard?? Had to do emergency stop about week ago and again yesterday and there was a loud bang/pop, thought my tyre had blown or something had gone on the brakes but checked it all and everything is fine.
Also passed MOT week ago and had new lower arms and bushes put on so can't be any issues with the brakes or suspension can it??

One thing I did notice was an eggy smell after the second time kinda catalytic converter smell but then it could of been something in the air?!?!

Baffled and slightly worried  :huh:
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1999 GTI 20V 1.8T AGU : Stage 1 Map : Forge Split-r (Full recirculate) : Forge TIP : Pipercross Viper CAI : 40mm Apex lowering springs : Custom interior trim : 2009 Ibiza sport Gear Knob : Custom Mats : bora sport instrument cluster : Bora Vents :

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Offline davemk4

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Re: rather loud bang/pop worried
« Reply #3 on: 11 July 2013, 13:46 »
Quote from: GTi_James on 11 July 2013, 10:57
mine done this today and with erratic idle :undecided:

smoothed out a little after a bit of motor way driving but my boost gauge needle drops and rises whilst idling :sad:

Mine also got none smooth idle it used to never move now as like yours you can see boost gauge needle moving....
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline navmk4gti

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Re: rather loud bang/pop worried
« Reply #4 on: 11 July 2013, 14:15 »
Blockage or crap built up in the cat :undecided:
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Offline GTi_James

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Re: rather loud bang/pop worried
« Reply #5 on: 11 July 2013, 14:41 »
no cat, straight through 3"-2.5"  :undecided:
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Mk4 Golf 1.8t AUM, Wintersports Addition. PiperX panel filter, 008p Forge DV, Toyosports DP 3", Miltek Anni Style CatBack non resonated, APR Sport CAT 200Cell, Catch Can RS4 Reps 18s, OEM R32 front and OEM

Offline Wazzzer

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Re: rather loud bang/pop worried
« Reply #6 on: 11 July 2013, 14:54 »
Both of you, check your small vac lines
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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 davemk4

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Re: rather loud bang/pop worried
« Reply #7 on: 11 July 2013, 14:55 »
No cat in mine. Which do you mean wazzer?
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline Wazzzer

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Re: rather loud bang/pop worried
« Reply #8 on: 11 July 2013, 15:10 »
Any of the lines off the inlet manifold including the one underneath. You can pull air in through them under load which cause popping and banging
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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 davemk4

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Re: rather loud bang/pop worried
« Reply #9 on: 11 July 2013, 16:58 »
My idle issue started after my dyno session wonder if a pipe not on or summit...
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back
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