Pinking under load? - Page 2

**outnumbered** · 07-02-2013, 02:30 PM

That's a bummer - hope it gets sorted quickly.

digi · 07-02-2013, 04:13 PM

is the petrol cap on properly? I know I know, but try to cover the easy bits first.

sjb · 07-02-2013, 04:18 PM

Quote:

Originally Posted by digi

is the petrol cap on properly? I know I know, but try to cover the easy bits first.

I will check but I'd say yes. I've put fuel in and it hasn't changed.

The seller is having it checked by a guy with some diagnostics gear tomorrow morning so now the emissions light is on there will be a fault logged.
I just want to drive it !!

digi · 07-02-2013, 07:01 PM

reason I ask this is that if the cap isn't on properly and gas vapor is leaking, according to the manual, it will light up on the dash as per your photo.

sjb · 07-02-2013, 07:25 PM

Just checked, it's on ok.

**cantfind1** · 07-02-2013, 10:49 PM

Compression test is useless, you need a leak down test......

Should not ping at all in any gear, under any load, with any normal unleaded fuel in it.....

The ecu adjusts timing so fast its unbelievable, the knock sensors are very sensitive and will pull timing immediately to protect the engine....

If its pinging then there is a mechanical problem and the ecu has retarded timing as far as it can....

I would guess as above Head gasket has split between the cylinder walls, only way to check is with a leak down test...

sjb · 07-02-2013, 11:30 PM

Well it's not looking like a great start to my ownership. Two test drives certainly didn't show up any pinking or lights. Immediately on picking it up I noticed it. I thought the same about the octane / ecu in that it would adjust to compensate.
Why would the emissions light be on though??

Not looking forward to tomorrow......although it does have a comprehensive 6 month warranty. Wonder how many get out clauses are in the small print

shane@mbtech · 08-02-2013, 01:07 AM

You only just bought it, you have rights don't worry.

My guess is they will say its a misfire, replace a coil and send you on your way. Then it will happen again.

Stress to them you would like a compression test as a minimum.

Where are you based?

**shimmy** · 08-02-2013, 09:01 AM

Most common reason for emissions light is the post cat sensors, normally trips if you have 100cell cats
Faults codes will reveal this one thou

billyboysm3 · 08-02-2013, 09:21 AM

As Lawsy said, let us know where your based and Im sure someone can recommend a decent garage/dealership.

07-02-2013, 02:30 PM	#11
outnumbered S5, Sport Off, DSC M-track Join Date: Nov 2009 Location: Reading Posts: 731 Casino cash: $19587	That's a bummer - hope it gets sorted quickly. __________________ Now with added SG CSL.

07-02-2013, 04:13 PM	#12
digi S5 - Full Throttle Join Date: Apr 2009 Location: Hong Kong Posts: 486 Casino cash: $4438	is the petrol cap on properly? I know I know, but try to cover the easy bits first. __________________ E46 M3 CSL + R35 GTR (bolt on mods 600bhp) + 458 Italia + LP560-4 + Audi S5

07-02-2013, 07:01 PM	#14
digi S5 - Full Throttle Join Date: Apr 2009 Location: Hong Kong Posts: 486 Casino cash: $4438	reason I ask this is that if the cap isn't on properly and gas vapor is leaking, according to the manual, it will light up on the dash as per your photo. __________________ E46 M3 CSL + R35 GTR (bolt on mods 600bhp) + 458 Italia + LP560-4 + Audi S5

08-02-2013, 09:01 AM	#19
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,646 Casino cash: $43909	Most common reason for emissions light is the post cat sensors, normally trips if you have 100cell cats Faults codes will reveal this one thou __________________ .

07-02-2013, 07:25 PM	#15
sjb S5 - Full Throttle Join Date: Jan 2013 Location: Brighton. Posts: 372 Casino cash: $6192	Just checked, it's on ok.

07-02-2013, 10:49 PM	#16
cantfind1 S5, Sport Off, DSC M-track Join Date: Oct 2009 Location: Sydney Australia Posts: 675 Casino cash: $6490	Compression test is useless, you need a leak down test...... Should not ping at all in any gear, under any load, with any normal unleaded fuel in it..... The ecu adjusts timing so fast its unbelievable, the knock sensors are very sensitive and will pull timing immediately to protect the engine.... If its pinging then there is a mechanical problem and the ecu has retarded timing as far as it can.... I would guess as above Head gasket has split between the cylinder walls, only way to check is with a leak down test...

07-02-2013, 11:30 PM	#17
sjb S5 - Full Throttle Join Date: Jan 2013 Location: Brighton. Posts: 372 Casino cash: $6192	Well it's not looking like a great start to my ownership. Two test drives certainly didn't show up any pinking or lights. Immediately on picking it up I noticed it. I thought the same about the octane / ecu in that it would adjust to compensate. Why would the emissions light be on though?? Not looking forward to tomorrow......although it does have a comprehensive 6 month warranty. Wonder how many get out clauses are in the small print

08-02-2013, 01:07 AM	#18
shane@mbtech CSL Register Uber-poster! Join Date: Feb 2009 Location: warrington Posts: 5,419 Casino cash: $19783	You only just bought it, you have rights don't worry. My guess is they will say its a misfire, replace a coil and send you on your way. Then it will happen again. Stress to them you would like a compression test as a minimum. Where are you based?

08-02-2013, 09:21 AM	#20
billyboysm3 CSL Register Uber-poster! Join Date: May 2011 Posts: 3,001 Casino cash: $25206	As Lawsy said, let us know where your based and Im sure someone can recommend a decent garage/dealership.