Hey there, a while back in February I missed having a red turbo diesel vehicle, stumbled upon this 1984 Mercedes 300TD
Wagon and pulled it from its grave of 20 years, all for $400!
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Wasn't running, braking, or pretty much anything really. Now it has all of its lights working, runs pretty good, and brakes well.
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Anyways I'm posting on here to get any second opinions/help, the engine has a fuel knock at idle up to around 1,200rpm until it goes away or just the exhaust noise overpowers it. Runs fine, revs up fine, just knocks. When I run the engine on a bottle of
Liqui Moly Diesel Purge the knock pretty much entirely goes away and the engine gets much quieter. As soon as I hook it back up to plain old diesel the knock comes back... videos below
Running on just diesel
Running off a bottle of diesel purge
Does anyone have any idea why it runs so much better on just the diesel purge, I realize I probably need rebuilt injectors since it sat in a field for 20 years and has 250,000 miles on it but why would they work so well when just changing the fuel? I was wondering if it was a cetane issue but I put some additive in and nothing changed. Just really any advice or knowledge.
I'll be heading home May 14thish, many troopy updates to come in the future!