Cold start tapping
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Joined: Aug 2021
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2008 E320 Bluetec, 1987 190e 2.6, 2007 CL600
Cold start tapping
My car sat a couple days and perhaps I was able to hear this due to the echo inside the garage and never noticed it before…
But when I first started the engine I heard some tapping that lasted about 2-3 seconds then went away once it seemed the oil pressure built up.
is this normal when cold?
But when I first started the engine I heard some tapping that lasted about 2-3 seconds then went away once it seemed the oil pressure built up.
is this normal when cold?
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Joined: Feb 2020
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1991 190E 2.3
My car sat a couple days and perhaps I was able to hear this due to the echo inside the garage and never noticed it before…
But when I first started the engine I heard some tapping that lasted about 2-3 seconds then went away once it seemed the oil pressure built up.
is this normal when cold?
But when I first started the engine I heard some tapping that lasted about 2-3 seconds then went away once it seemed the oil pressure built up.
is this normal when cold?
Thread Starter
Senior Member
Joined: Aug 2021
Posts: 335
Likes: 33
2008 E320 Bluetec, 1987 190e 2.6, 2007 CL600
Appreciate the quick replies. Good to know it’s normal but strange that I had never heard it do that before now
i am only recently keeping it consistently garaged when not in use
i am only recently keeping it consistently garaged when not in use
MBWorld Fanatic!
Joined: Feb 2020
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1991 190E 2.3
So long as it only taps for a couple of seconds and then goes away. If it begins to tap consistently and doesn't go away then that would be a problem but your car isn't doing that so it's not a problem.
Thread Starter
Senior Member
Joined: Aug 2021
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2008 E320 Bluetec, 1987 190e 2.6, 2007 CL600
This is unrelated to the tapping but I don’t want to keep starting multiple threads. The more I use the car the higher chance things will go wrong with it but I have fully embraced the challenge.
I think I have this one covered tbh but always enjoy the feedback from you all…this morning I stalled…first one in over a year
the car is surging at idle and not downshifting as it should coasting at 1000rpm during normal driving. This came out of no where it seems so I parked it for now but might be sticking micro switch? The rpm range seems to be 200-300 over its normal ranges at all conditions, seems to stall from getting too much air while stopped at a light. Will dig in later but thoughts?
I think I have this one covered tbh but always enjoy the feedback from you all…this morning I stalled…first one in over a year
the car is surging at idle and not downshifting as it should coasting at 1000rpm during normal driving. This came out of no where it seems so I parked it for now but might be sticking micro switch? The rpm range seems to be 200-300 over its normal ranges at all conditions, seems to stall from getting too much air while stopped at a light. Will dig in later but thoughts?
Last edited by BetterDaze; Nov 25, 2023 at 12:19 PM.
MBWorld Fanatic!
Joined: Feb 2020
Posts: 1,995
Likes: 394
1991 190E 2.3
This is unrelated to the tapping but I don’t want to keep starting multiple threads. The more I use the car the higher chance things will go wrong with it but I have fully embraced the challenge.
I think I have this one covered tbh but always enjoy the feedback from you all…this morning I stalled…first one in over a year
the car is surging at idle and not downshifting as it should coasting at 1000rpm during normal driving. This came out of no where it seems so I parked it for now but might be sticking micro switch? The rpm range seems to be 200-300 over its normal ranges at all conditions, seems to stall from getting too much air while stopped at a light. Will dig in later but thoughts?
I think I have this one covered tbh but always enjoy the feedback from you all…this morning I stalled…first one in over a year
the car is surging at idle and not downshifting as it should coasting at 1000rpm during normal driving. This came out of no where it seems so I parked it for now but might be sticking micro switch? The rpm range seems to be 200-300 over its normal ranges at all conditions, seems to stall from getting too much air while stopped at a light. Will dig in later but thoughts?
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Thread Starter
Senior Member
Joined: Aug 2021
Posts: 335
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2008 E320 Bluetec, 1987 190e 2.6, 2007 CL600
Sorry 190efan I meant to say that it is late to downshift,it eventually will(sticking longer than normal at 1000rpm) but also surge forward without any input from the pedal at times.
Idle in P I noted the rpm sticking to 1500
The fluid is bright red and I have never changed it since owning almost time for storage so we can tackle a lot
Idle in P I noted the rpm sticking to 1500
The fluid is bright red and I have never changed it since owning almost time for storage so we can tackle a lot
Last edited by BetterDaze; Nov 25, 2023 at 04:24 PM.
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Member
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From: In the bush on the shores of Lake Nipigon
1990 Mercedes 190E
Vacuum leak somewhere if idle is high. Perhaps the liine to the transmission modulator valve? Just a guess but I know when my car had a high idle there was a disconnected vacuum line. The fact the transmission is not shifting correctly makes me wonder about the modulator valve.
Thread Starter
Senior Member
Joined: Aug 2021
Posts: 335
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2008 E320 Bluetec, 1987 190e 2.6, 2007 CL600
Thanks for the hint on vacuum leak. I checked all the lines and didn’t find anything and micro switch is working like normal though crusty
my injector #2 had a loose line and bracket I could wiggle and lift by hand. Symptoms went away after retightening so hoping it was just a vacuum leak at rubber injector seal
my injector #2 had a loose line and bracket I could wiggle and lift by hand. Symptoms went away after retightening so hoping it was just a vacuum leak at rubber injector seal
Last edited by BetterDaze; Nov 26, 2023 at 06:31 PM.
MBWorld Fanatic!
Joined: Feb 2020
Posts: 1,995
Likes: 394
1991 190E 2.3
Sorry 190efan I meant to say that it is late to downshift,it eventually will(sticking longer than normal at 1000rpm) but also surge forward without any input from the pedal at times.
Idle in P I noted the rpm sticking to 1500
The fluid is bright red and I have never changed it since owning almost time for storage so we can tackle a lot
Idle in P I noted the rpm sticking to 1500
The fluid is bright red and I have never changed it since owning almost time for storage so we can tackle a lot
MBWorld Fanatic!
Joined: Feb 2020
Posts: 1,995
Likes: 394
1991 190E 2.3
Vacuum leak somewhere if idle is high. Perhaps the liine to the transmission modulator valve? Just a guess but I know when my car had a high idle there was a disconnected vacuum line. The fact the transmission is not shifting correctly makes me wonder about the modulator valve.
MBWorld Fanatic!
Joined: Feb 2020
Posts: 1,995
Likes: 394
1991 190E 2.3
Thanks for the hint on vacuum leak. I checked all the lines and didn’t find anything and micro switch is working like normal though crusty
my injector #2 had a loose line and bracket I could wiggle and lift by hand. Symptoms went away after retightening so hoping it was just a vacuum leak at rubber injector seal
my injector #2 had a loose line and bracket I could wiggle and lift by hand. Symptoms went away after retightening so hoping it was just a vacuum leak at rubber injector seal
