S-Class (W126) 1979-1991: 300 SE, 300 SEL, 380 SE, 380 SEL, 420 SEL, 500 SEL, 560 SEL, 360 SEC, 500 SEC, 580 SEC, 300 SD TURBODIESEL, 300 SDL TURBO, 350 SD TURBO, 350 SDL TURBO

91 420SEL no start

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Old 03-02-2021, 01:21 AM
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2016 C63S, 2013 SLS AMG GT Coupé
91 420SEL no start

Looking at picking up a non running 420SEL. Been sitting 2-4 years with little to no gas in the tank. Went to look at it today but my jumper pack started acting up and wouldn't provide power to the cars anymore. I only had time to throw some new gas in and try to crank it just to see what would happen. Got a little bit of power but not enough to get it cranking longer than 5 or so seconds.

I'm going to try to go back and check it again tomorrow (Tuesday) anything I should check? Tried listening for the fuel pump but didnt hear much. Likely due to the low power output of my jumper pack though. Any help would be appreciated, id like to check fuel flow at the rails but im not sure which hose the main fuel line is.
Thanks in advance.
Old 03-02-2021, 06:14 PM
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1999 E300TD
Very basic and simple its either spark or fuel---------which is it??
Old 03-02-2021, 08:53 PM
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I havent even taken the car home yet. I suspect its fuel. Looking for advice dealing with the fuel pump relay and the fuel pump. Been looking through the forums and cant find a whole lot.
Old 03-03-2021, 10:04 AM
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1999 E300TD
if you are foolish enough to purchase the 30 year old car without driving the car and you are not a restorer you deserve what you get---dont whine about it
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Old 03-03-2021, 11:16 AM
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Originally Posted by Plutoe
if you are foolish enough to purchase the 30 year old car without driving the car and you are not a restorer you deserve what you get---dont whine about it
Alrighty then, guy.
who’s whining about what? I’m picking the car up today, asking the community if there’s anything in particular I should check with the specific MY and engine.
take a chill pill and hop off your high horse.

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