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#1
07-17-2008, 09:47 PM
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'77 450SL No Start
Sure could use some assistance. Here's what I know.
Car was driving normally, died and no restart. Engine cranks normally, no spit or sputter, no start. Fuel pressure and volume at fuel distributor normal. Ignition delivering good spark to plugs. New distributor cap, rotor, wires, and plugs. New fuel pump. Cold start valve sprays. What other info do you need for diagnosis? Thanks for your help. 
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#2
07-17-2008, 10:56 PM
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I am not real familiar with gas engines but how many miles and when was the last time the timing chains were checked/replaced?
__________________
'85 300SD (formerly california emissions) '08 Chevy Tahoe '93 Ducati 900 SS '79 Kawasaki KZ 650 '86 Kawasaki KX 250 '88 Kawasaki KDX200 '71 Hodaka Ace 100 '72 Triumph T100R
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#4
07-23-2008, 01:52 PM
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How did you check for fuel pressure?
Is the pump running while you crank the starter? Are the plugs wet or dry?
__________________
Chuck Taylor Falls Church VA '66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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#5
07-23-2008, 01:54 PM
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dump some gas in the intake and see if it sputters. If not then check the compression.
__________________
1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
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#6
07-23-2008, 06:54 PM
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Hello,
If you have air, fuel, spark on time and compression, the engine will run. Good advice on checking with starting fluid. Check to see if the spark is on time (going to the right cylinder when it is on its compression stroke). Air is almost a given. A quick compression check will tell you if the timing chain or distributor jumped! Last edited by ja17; 07-23-2008 at 10:15 PM.
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#7
08-24-2008, 06:34 PM
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Did you check the ballist resistors? there are 2 of them on the left fender I think. They look like a long rectangular prism and have wires connected at both ends. The mercedes engine manual should have the resistance listed. I had one go out once and it would not start until I replaced the bad one.
Good luck, Lee
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