I have a 1989 Mercedes 190D non turbo,I live in Toronto,As the weather has gotten colder 0 degrees,My motor has started to PING on acelleration.The ping sounds like a when you run a high performance gas engine on really cheap gas,I think they call it detonation,Is this normal for a diesel?My car has 150,000 miles and has been well maintaned.The pingging sound continues when I am crusing but not as loud.The ping sound is much louder when the engine is cold.Other than the ping,the car runs great and no difference in fuel mileage.Can any one help?

is to be expected. perhaps the winter fuel is contributing to it. my diesel mechanic farmer brother friends tell me that if the pump is timed and mixture adjusted to optimum some stray rattling and pinging is expected.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

I was getting some nasty ping at cruising speed after running WVO blend all summer, and then going back to pump Diesel. It wasn't something the car was doing in it's pre- WVO days, so I was pretty sure it must have been caused by fouled injector tips. I tried several brands of Diesel treatment, including the legendary Diesel Purge procedure- all of which seemed to bring temporary relief. Finally, I ran a full bottle of Kleen-Flo brand through half a tank- this seems to have fixed it permanantly, after several fill ups, we're still good.

I also read in a Chilton's manual that if the timing chain tensioner is worn out, it will result in pinging noises at cruising speed.

Dave

1976 300D

I aiso run WVO in a two tank system,When running on WVO my car does not ping at all,It only pings on diesel.I am going to use Diesel Purge this weekend,and then try your remedy

Diesel purge works!
Not "i hope it works"... This stuff works!
Fixes rough idle; ends pinging & makes engine run smoother.
(Valve adjustment is a critical factor also.)

whoever created diesel purge is worthy of an animal sacrifice.

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1982 240D.
My name is Michael, and I am an 18 year old binge-drinkin', cigar-smokin', novel-writin', all around unsavory and unnattractive guy. I tell long-winded stories, and I only shave once a week, although I've had to do it every day since I was 16.

Get some of the PowerService conditioner and add 12 oz. to 20 gallons. See if the ping goes away. Report back with findings.

Remove the injectors and have them bench tested, repair faulty ones.

I have never had any luck with those additives, I ran diesel purge through the SD and nothing really changed. Power Service seems to boost cetane and make the engine run smoother thats about it.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

1984 300d Turbo 136k
When Doing The Diesel Purge Go Into Prefilter You Will See Dirt In The Prefilter, Replace 2 Ea Filters Done 30 Min. Diy

Typically a ping at higher engine speeds is caused by a bad injector. My '82 300D developed this problem and sure enough #5 injector was just pissing instead of spraying. But my '96 has some pinging too, though only around 3200 rpm and above when the engine is cold. I've tested the injectors and they were ok, not a perfect spray pattern, but ok. I'm not sure how common this is, but I don't think it's normal.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL

I used diesel purge last night,car runs great,back to normal,no more ping and peppier acceleration

Hmm, a machine that goes, "Ping!"

The question is, does it still ping after all the Diesel Purge is out of the system? DP has never seemed to work for me, other than temporarily quieting the engine while running on it.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL

Yes I don't have a lot of faith in these snake oils,but I heard a lot of good thinks about diesel purge,so I tried it.Ran 125 miles from time of purge,no more pings,car runs quiter and smoother.

I think the term ' Nailing' is relevent to diesel noise...apart,that is, from cold idle 'knock'.


JMTCW.


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