Faulty Injector ?

Phoenix

Active Member
Joined
Feb 25, 2009
Messages
26
Reaction score
0
Location
Johannesburg, South Africa
Your Mercedes
2002 C230 Coupe
Hey all,

Quick Question, If an injector is faulty will it create a "tick" sound

Reason I ask is, Ive been looking for the source of a "knock" and came across this "tick" HAHA, I checked the other injectors and they seem to be quiet. Although my car rides fine

Thanks
 

stu1765

Active Member
Joined
Feb 27, 2009
Messages
29
Reaction score
0
Location
Lincolnshire
Your Mercedes
E240 Elegance 1998
Hi Phoenix

This is soooooooo spooky!!

I have just posed the same question on my longterrm "tickety/tappety" sound on my E240!!!!

Have always been told its an exhaust manifold, cam chain or cam follwer ............but today I am certain I have sourced the noise from the injector rail. I posed the same question on my thread "Cam Follower Replace"

Waiting for some replies but can you tell me if you found an injector that was causing the ticking? If so you may well have helped me solve a mystery that I have had to endure for about 5 years!!!

Stu
 

Xtractorfan

Senior Member
Joined
Nov 16, 2007
Messages
6,084
Reaction score
156
Your Mercedes
S class
Yes very common on diesel engines..Injector knock
 
OP
P

Phoenix

Active Member
Joined
Feb 25, 2009
Messages
26
Reaction score
0
Location
Johannesburg, South Africa
Your Mercedes
2002 C230 Coupe
  • Thread Starter
  • Thread starter
  • #4
:) I came across the noise by using a pipe ,, Mines coming from injector 4 , although my car rides fine.. So lets hope :)
 

stu1765

Active Member
Joined
Feb 27, 2009
Messages
29
Reaction score
0
Location
Lincolnshire
Your Mercedes
E240 Elegance 1998
I am going to check tomorrow - mines a V6 petrol M112 engine. There looks to be an electrical connector for each injector so I presume I can go through them in turn unplugging one until I hopefully find the offending injector?
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
331
Age
86
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
I am going to check tomorrow - mines a V6 petrol M112 engine. There looks to be an electrical connector for each injector so I presume I can go through them in turn unplugging one until I hopefully find the offending injector?

That should be a way of answering your fault
 

stu1765

Active Member
Joined
Feb 27, 2009
Messages
29
Reaction score
0
Location
Lincolnshire
Your Mercedes
E240 Elegance 1998
Well its inconclusive. I disconnected each injector plug in turn to see if the ticking sound went away but no joy - still there regardless of which injector plug was removed. Further "listening" with the long screwdriver reveals the same ticking from each injector. I presume that this is normal because they are essentially rapidly switched solenoids???

I can't believe that all of the injectors would be bad....

So at a loss again as to the source of the ticking - it is definitely linked to the accelerator process as it is way more pronounced under acceleration.

Can anyone comment on the "standard" noise for the injector and inlet manifold?

Could it be in any way linked to resonance from any internal weld coming loose in the exhaust manifold as suggested to me by two "indies"???

Stu
 
OP
P

Phoenix

Active Member
Joined
Feb 25, 2009
Messages
26
Reaction score
0
Location
Johannesburg, South Africa
Your Mercedes
2002 C230 Coupe
  • Thread Starter
  • Thread starter
  • #9
Well Stu,

If I use a pipe on Injector 4 i can hear a long Tick, The other injectors on my car are very soft. So ill test mine tonight and see what happens

Phoenix
 

Andrew23

Active Member
Joined
Jan 8, 2008
Messages
31
Reaction score
0
Location
Teesside
Your Mercedes
2008 E280 Elegance saloon
My motor has just started making a regular "hiss" in time with the engine. Took the top covers off and I can feel a pulse of hot air in time with the hiss in the region of injector 4. There is an awful smell of "burning"; an acrid smell that comes into the cabin that is most noticable with the heater on and stationary or travelling at slow speed. Spoke to the indie who I use and he says it could be the sealing washer under the injector. It's going in tomorrow for them to look at it anyhow. I'll let you know what it turns out to be.

Andrew.
 

jibcl500

Senior Member
Joined
Oct 22, 2005
Messages
6,420
Reaction score
6
Age
53
Location
Cambridgeshire
Your Mercedes
CL500,ML55,SLK280
Hi Phoenix

This is soooooooo spooky!!

I have just posed the same question on my longterrm "tickety/tappety" sound on my E240!!!!

Have always been told its an exhaust manifold, cam chain or cam follwer ............but today I am certain I have sourced the noise from the injector rail. I posed the same question on my thread "Cam Follower Replace"

Waiting for some replies but can you tell me if you found an injector that was causing the ticking? If so you may well have helped me solve a mystery that I have had to endure for about 5 years!!!

Stu

Well if you need parts for a 240 then have a look in my shop http://stores.shop.ebay.co.uk/Mercanic-Mercedes__W0QQ_armrsZ1

jib
 

LYNALL

Senior Member
Joined
Aug 7, 2003
Messages
315
Reaction score
0
Location
Kent
I can hear the injectors ticking on mine and the wifes is the same.



Lynall
 


Specialist Classic Parts suppliers
SLS Im- & Export Handelsges.mbH, Industriestrasse 2 - 4, D-22885 Barsbuttel (bei Hamburg)
Tel. +49 (0)40 656 939-0, Fax +49 (0)40 656 939-399
Visit our website atwww.sls-hh-shop.deto view our comprehensive catalogue of parts for:
190SL (R121), 230 - 280SL (R113), 280 - 500SL/C (R/C107)
Good English spoken and friendly service to discuss your requirements.
Top Bottom