W124 Gasoline - Will Not Start
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Newbie
Joined: Apr 2006
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From: Gold Coast Australia
W124 300E
W124 Gasoline - Will Not Start
After sitting for 10 days she just wont start - turns over well but will not fire -have fuel and spark up but doesn't even look like starting - got a couple mini back-fires is all - HELP!!!!! 
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From: Sydney, Australia
'86 300e
hmmm...yeah, maybe not a wallaby, but a rat or something. Something has to have changed, I regularly leave my car sitting up to 6 weeks when I go overseas and it always fires up first bang, well not quite but only needs enough cranking to get some fuel pressure. How do you know its getting fuel?
My understanding (rudimentary) of the fuel pumps is that its set up to pump only when the engine is turning over unlike electronic injector systems where common rail pressure is pumped up when the key is turned on. The next thing is the cold start injector but there's no reason why it wouldn't work apart from the proverbial rat chewing through the wires...
My understanding (rudimentary) of the fuel pumps is that its set up to pump only when the engine is turning over unlike electronic injector systems where common rail pressure is pumped up when the key is turned on. The next thing is the cold start injector but there's no reason why it wouldn't work apart from the proverbial rat chewing through the wires...
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From: REHOBOTH BEACH DE
88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
Your symptoms are typical of a blown fuse.
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Joined: Apr 2006
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From: Gold Coast Australia
W124 300E
Injector Cleaner Problem
On the other hand the cleaner has really cleaned up the injectors and got rid of the slight lag an starting.
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Joined: May 2005
Posts: 2,494
Likes: 17
From: REHOBOTH BEACH DE
88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
My MBZ Techo reckons this is a result of me adding injector cleaner to the fuel tank and only travelling a very short distance (70kms), before letting it sit while away on vacation. Seems dislodged glunk is probable causing the fuel pump piston to stick. Is now starting intermittantly and he recommended I use up the existing fuel (and injector cleaner), asap and refill with fresh fuel to finally overcome the issue.
On the other hand the cleaner has really cleaned up the injectors and got rid of the slight lag an starting.
On the other hand the cleaner has really cleaned up the injectors and got rid of the slight lag an starting.
Glad it started for you
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'87 260E
Check OVP fuse. If that's ok, switch key to on position then try to listen to the fuel pump at the right side of the rear seat. Or you can remove the fuel pump relay behind the battery and short terminal 87 & 15 with a small jumper wire then start, if it does your relay is kaput. Good luck.
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Newbie
Joined: Apr 2006
Posts: 15
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From: Gold Coast Australia
W124 300E
Check OVP fuse. If that's ok, switch key to on position then try to listen to the fuel pump at the right side of the rear seat. Or you can remove the fuel pump relay behind the battery and short terminal 87 & 15 with a small jumper wire then start, if it does your relay is kaput. Good luck.
