Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.
Weird pop on lift off.. WTF?
- MDUBZ
- Member
- Posts: 139
- Joined: Sun Nov 29, 2015 3:06 pm
- Location: Cambridge
Weird pop on lift off.. WTF?
Any ideas, it sound's like someone putting their finger in their mouth and making that pop sound you do as a kid.. it only occurs on lift off if I'm in 3rd and rev between 2k and 3k and lift off i get a loud pop.
Its a 3.0si
Its a 3.0si
Current: 3.0si E85, Mini JCW , SMAX (3 kids) , Ducati Monster, z1000sx
-
- Lifer
- Posts: 5277
- Joined: Wed Feb 19, 2014 3:01 pm
- Location: NW London
Weird pop on lift off.. WTF?
Enjoy it
3.0si Sport: F10 Illuminated ZHP, Retrofit Cruise, OE Stubby, Gaptech RCH+, Kenwood BT73DAB + Handsfree, HIDs, LED Sidelights, OE LED Number Plate Lights, Custom LED strip bootlight.
- Silverzedtom
- Senior Member
- Posts: 1478
- Joined: Sun Jan 15, 2017 8:19 pm
- Location: East Sussex
Weird pop on lift off.. WTF?
As above, part of the fun.
Some people even spend money making the pops louder, myself included
Some people even spend money making the pops louder, myself included
E85 2.5si
F55 Cooper S
F55 Cooper S
- MDUBZ
- Member
- Posts: 139
- Joined: Sun Nov 29, 2015 3:06 pm
- Location: Cambridge
Weird pop on lift off.. WTF?
No.. this isn't a good pop. It sounds like someone hitting a glockenspiel
Current: 3.0si E85, Mini JCW , SMAX (3 kids) , Ducati Monster, z1000sx
- skelters
- Senior Member
- Posts: 2640
- Joined: Thu Jun 14, 2007 11:18 pm
- Location: Greenock, Scotland
Weird pop on lift off.. WTF?
Might be worth trying to record it or get someone to record it for you.
2007 Z4 3.0si Sport. Silver Grey Metallic, Brembo Brakes, HEL Braided Brake Hoses, Machine Monkey Exhaust Tips, Stubby, Piano Black trim, Black Leather, Bilstein B12-Pro-Kit, Michelin Pilot Sport 4 on MV2's. Roof Motor in the Boot!
-
Onlinebuzyg
- Legend
- Posts: 26544
- Joined: Fri May 20, 2011 6:11 pm
- Location: Cornwall
Weird pop on lift off.. WTF?
Where is it coming from. Exhaust, under the car, engine bay, glove box?
- MDUBZ
- Member
- Posts: 139
- Joined: Sun Nov 29, 2015 3:06 pm
- Location: Cambridge
Weird pop on lift off.. WTF?
Ok.. so....
home to pub 1 : pop
pub1 to curry: pop
Curry to pub 2 : pop
Pub2 to home: try as I might, i couldn't replicate.. nice little blast with a clio williams I stumbled across ( used to really want one of those and a rare sight now) road was too twisty to get past but good fun.
The pop was coming from my left and slightly behind, had a passenger from pub1 to Curry house and he couldn't pin point it, but it was coming from his right so fairly central. I checked the boot or the chubby hole for any loose items that could have been knocking but nothing.. Exhaust was burbling nicely... any way, if it happens again I'll record it. The answer seems to be drink and it goes away....
home to pub 1 : pop
pub1 to curry: pop
Curry to pub 2 : pop
Pub2 to home: try as I might, i couldn't replicate.. nice little blast with a clio williams I stumbled across ( used to really want one of those and a rare sight now) road was too twisty to get past but good fun.
The pop was coming from my left and slightly behind, had a passenger from pub1 to Curry house and he couldn't pin point it, but it was coming from his right so fairly central. I checked the boot or the chubby hole for any loose items that could have been knocking but nothing.. Exhaust was burbling nicely... any way, if it happens again I'll record it. The answer seems to be drink and it goes away....
Current: 3.0si E85, Mini JCW , SMAX (3 kids) , Ducati Monster, z1000sx
- coupedan
- Member
- Posts: 437
- Joined: Sun Jan 26, 2014 3:37 pm
- Location: West Berkshire
Weird pop on lift off.. WTF?
Gonna go ahead and say.. is it more of a thud sound..?
If so, could be the diff input shaft.. the 3.0si has a common issue with the diff input shaft "sticks" when you slow down or set off in traffic creating a thud like noise?
If so, could be the diff input shaft.. the 3.0si has a common issue with the diff input shaft "sticks" when you slow down or set off in traffic creating a thud like noise?
- MDUBZ
- Member
- Posts: 139
- Joined: Sun Nov 29, 2015 3:06 pm
- Location: Cambridge
Weird pop on lift off.. WTF?
Thx, nope, there is no thud or a feeling of vibration or jolt as drive engages. It's still silky smooth - It was a fairly high pitched pop which sounded like it was coming from just to my left. It had us both head scratching. I'll go out for a play tomorrow to see if I can do it again and record it.
Current: 3.0si E85, Mini JCW , SMAX (3 kids) , Ducati Monster, z1000sx
- tomrdy
- Member
- Posts: 492
- Joined: Tue Jun 26, 2018 9:16 am
- Location: Sydney, Australia
Weird pop on lift off.. WTF?
My first thought was "mad! enjoy it" but after reading your description, that sounds annoying AF!
My wild guess is that it could be something to do with the vacuum from the sound generator (assuming you have one). What specifically I have no idea but worth a look?
The sound generator hole into the cabin is in the left footwell. If you remove the passenger side panel under the glove box (I assume youre RHD), you will see a hole on the firewall - this is where the pipe from the sound gen goes to. Maybe something is going on in there?
If you can't find it let me know and I'll remove mine (i was going to remove it to do some new wiring next week but I can do it earlier if it helps you out).
My wild guess is that it could be something to do with the vacuum from the sound generator (assuming you have one). What specifically I have no idea but worth a look?
The sound generator hole into the cabin is in the left footwell. If you remove the passenger side panel under the glove box (I assume youre RHD), you will see a hole on the firewall - this is where the pipe from the sound gen goes to. Maybe something is going on in there?
If you can't find it let me know and I'll remove mine (i was going to remove it to do some new wiring next week but I can do it earlier if it helps you out).
-SOLD- Nardo grey 2004 Z4 3.0i E85
-SOLD- 2016 Long Beach Blue M2 DCT
-Wishing- Z4MC Interlagos blue...
___
Australia
- MDUBZ
- Member
- Posts: 139
- Joined: Sun Nov 29, 2015 3:06 pm
- Location: Cambridge
Weird pop on lift off.. WTF?
thx, yeah, my fist thought was it might becoming from the sound generator i had a quick look at pub 1; I wondered if the air intake was split and the sound was passing through into the cabin.. but everything looked pretty good and i couldn't get it to do it when the car was static.
and yes it was as annoying AF, not just the sound but because i couldn't workout what was doing it
and yes it was as annoying AF, not just the sound but because i couldn't workout what was doing it
Current: 3.0si E85, Mini JCW , SMAX (3 kids) , Ducati Monster, z1000sx
- MDUBZ
- Member
- Posts: 139
- Joined: Sun Nov 29, 2015 3:06 pm
- Location: Cambridge
Weird pop on lift off.. WTF?
no sign today...
Current: 3.0si E85, Mini JCW , SMAX (3 kids) , Ducati Monster, z1000sx