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#1
04-18-2006, 09:29 PM
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1995 C280
hi!
I am having a problem with my 1995 C280 , sometimes it cranks but dosent start, i hear the fuel pump working but i took one of the wires off one of the coils and i got no spark when i crancked!! so it;s spark related i am pretty sure. has anyone had a similar problem? Last edited by TOM77; 04-18-2006 at 09:41 PM. 
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#2
04-18-2006, 09:43 PM
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Has the wiring harness been replaced -- this is a warrenty thing, I think (bad insulation)?
Otherwise, likely a bad TDC sensor (rear of engine) or a bad ignition unit, possibly bad coil(s) or wires. Peter
__________________
1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
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#3
04-18-2006, 11:31 PM
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i dont get spark at any coil, so its not the coils .. what are the chances of all the coils going at once, would the TBC sensor cause no spark? how about the crank sensor? and what part of the harness goes? what area should i look for a bad harness wire?
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#5
04-19-2006, 08:26 PM
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O.V.P. Relay.......................
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#7
04-24-2006, 06:55 AM
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Quote:
OVP
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#8
04-24-2006, 01:45 PM
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OVP Link
A Dalton: I can't access the search in the link you mentioned earlier. how do I find the information I need on this part? There are 2 parts listed with the same number but different prices. Which one do I need to order? Thanks for your Help!
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#9
04-24-2006, 02:16 PM
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Quote:
They are the same, just different Brands Go here and read thread #11
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#10
04-25-2006, 02:05 PM
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Reading thread #11
Is this thread #11? If so I have read through it. I am wondering if I need both the OVP regulator and the crank sensor. How do I know if I need one or both and if only one which one?
__________________
LGP 1990 300SEL 1995 C280 1957 Chevy Bel Air 4 door sports sedan www.billpurdom.com
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#11
04-25-2006, 02:39 PM
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Quote:
The OVP had failures , so they changed the part to remedy the problem . You want to see the part# on your OVP The new part is 000 540 67 45 , the old is 000-540-52-45.. , If you have the old style , change it to the new replacement and see if that rectifies the problem.. A quick test for OVP is in my last posting to you ,, you tap the relay and try to start the car again. If it starts ,then the relay is suspect of having a problem [ very common] The crank sensor takes some electrical meter testing to verify, but I would start with the OVP b/c of their HIGH failure rate and the part change that Benz took care of. Use the SEarch feature on top of the page and list OVP.. it is all there in the Archieves..
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#12
04-24-2006, 03:10 PM
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Crank sensor. My 94 did the exact same last week.
__________________
1994 C280, dark green metallic 105k miles 1991 190E 2.6, Black 191,500 miles (sold to another forum member) 2003 Chevy Tahoe LT, Redfire Metallic 105k miles 1989 Mustang GT Cobra Convertible 43k miles
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#13
04-24-2006, 05:25 PM
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Quote:
Next time it does not start, give the OVP a few taps with a screwdriver handle and retry,, Both of these items effect ignition, so either will have the same symptoms.............. The crank sensor can be detected with a scope, but that will take a Tech.
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#14
04-25-2006, 08:06 PM
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Wiring Harness
I have already replaced the wiring harness, fuel pressure regulator, fuel pump relay and had the connections from the relay to ecm cleanded. The local mercedes dealer forgot to put the gromits in when he replaced the wiring harness! I have recently received the name of another shop in town and will try them. I could tell it really PO these guys that I was even asking about the OVP. Even our local Mercedes Dealership has mentioned nothing about this failure. They all suggest that I wait untill the problem gets worse. By waiting will I cause major problems down the road? Should I replace it now?
__________________
LGP 1990 300SEL 1995 C280 1957 Chevy Bel Air 4 door sports sedan www.billpurdom.com
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#15
04-25-2006, 08:14 PM
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Get the part # as has been suggested and next time the car does not start, try and tap it.......
I believe you are looking for a complete positive answer for an intermittent problem and those do not exists... which is why your guys can not remedy the problem.... reread the previous post and give the suggestions a try. I can not add much more.......................................
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