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#1
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ATF smooth, Diesel rough!
Hello guys!
I would like to hear your opinion about this. Two days ago I changed my engine oil and while doing that, I decided to try to clean my injectors using ATF. I readed this was possible due to the detergents the ATF has. I made a little fuel tank from a gallon and poured 2 quarters of ATF and completed the gallon with Jet-1 fuel. I had the engine burn half of the gallon and the idle got really really smooth and quiet. I poured the remaining half gallon in my fuel tank (which was a 1/3 full) and the car was running like it never did before! Yesterday I filled my tank with normal diesel and now the anoying nailing noise from the injectors is back!!! Why could this have happened?
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1982 W123 300D NA Euro, 300K Miles, 4-speed manual, 3.46 rear diff, early W126 front brakes, Penta rims with 205/60R15 FH900's, custom fitted (by me) audio system, more to come into the money pit... Soon to be installed: Bilstein HD, R107 front discs and 4-piston calipers, HD Suspension springs, wagon front swaybar. |
#2
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Did you have the injectors tested for pop pressure and spray pattern?
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K |
#3
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nope, my experiment was that, a simple experiment....
You know, I was there, waiting for the engine oil to drain.... I saw an empty gallon container, the atf quarts... I recalled having a couple of Jet-A1 fuel somewhere in the warehouse.... With the mix I did, the engine was running incredibly smooth! I was very very impressed with the smoothness and the quietness of the idle.
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1982 W123 300D NA Euro, 300K Miles, 4-speed manual, 3.46 rear diff, early W126 front brakes, Penta rims with 205/60R15 FH900's, custom fitted (by me) audio system, more to come into the money pit... Soon to be installed: Bilstein HD, R107 front discs and 4-piston calipers, HD Suspension springs, wagon front swaybar. |
#4
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A Diesel will run very quietly and smoothly on ATF, that should not be a surprise.
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#5
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Using ATF frequently has been known to coke injectors.
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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate Sooner or later every car falls apart, ours does it later! -German Narrator in a MB Promotion Film about the then brand new W123. |
#6
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Using ATF has done nothing but clean mine out. Of course I only add mine when I change the fuel filter. I top off the fuel filter with ATF before I screw it on then purge the system of air like you should when changing the fuel filter. The other method is to just add a quart to the fuel tank and drive it.
Maybe you got air in the system?
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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons ) white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank) desert storm primer 63 T-bird "The Undead" (long term hibernation) http://ecomodder.com/forum/fe-graphs/sig692a.png |
#7
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The 616 and 617 will run very quiet on ATF, veg oil, motor oil and just about any other thicker oil you would add to the fuel. Why? I dont know. The engine sounds much better- but that certainly does not mean it is better for the engine. Even 1/2 gallon of any of these "fuels" will quiet the engine when added to a full tank. The louder engine will return when the oil is no longer burned. Same event occurs when cleaning the injectors with diesel purge.
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