|
|
|
|
|
LinkBack | Thread Tools | Display Modes |
#1
|
||||
|
||||
C36 Starting Problem: OVP, CPS, Wiring Harness are OK; whatelse??
Hello,
My 96 C36 with 75k + miles currently have a problem starting and I can’t seem to find an answer (fix) by searching the forums for previous posts; only recommendation of what I can do. Problem: When starting the car, it would take at least 3 to 4 cranks before it would turn over. Once it starts, however, and within minutes of shutting it off, it will start again with no problems. But if I let it stand 10 – 30 minutes, the car would require 3 to 4 cranks again before it would start back up. The car also performs as it normally would when it starts; no loss of power, no erratic idling, No CEL, and or anything out of the ordinary. Forum Recommendations: Bad Over Voltage Protection Relay (OVP) as it is common to go bad. I replaced this and the problem did not go away. Check bad fuses and relays. Next Step: I gave up and went to the dealer for them to diagnose and fix. The dealer had my car for over two weeks and was not able to re-create and diagnose the problem – they think I’m making it up. They said they performed the following checks: Electrical short, OVP, Wiring Harness, Gas (water; bad tank from gas station), Clogged Fuel Rail, Crank Positioning Sensor (CPS), and blown Fuse/Relay, Spark Plugs, Coils, and found nothing. With the chance to potentially charge me a significant amount of money for any of these services, they didn’t find anything wrong with the car, but once I got the car back I still had starting problems. I escaped without paying a dime for the diagnostic services and I was provided with a 2011 C300 as a loaner for two weeks – not bad. I am looking for some feedback from C36/W202 owners and mechanics that have experience with the same symptoms. Thanks! |
#2
|
|||
|
|||
Might not be it, but the CPS is usually something that is intermittent when it fails. And during normal diagnostics will most likely test good.
__________________
http://i193.photobucket.com/albums/z...-RESIZED-1.jpg 1991 300E - 212K and rising fast... |
#3
|
|||
|
|||
If what you are saying is that, intermittently, when turning the key the engine would crank but not catch, I had the same problem last winter on my C230. No CEL, no codes, mine was caused by the fuel pump relay. Swapped it out and it never happened again.
|
#4
|
||||
|
||||
I will try the fuel pump relay swap.
|
#5
|
|||
|
|||
hello,
Question: does the car start up on first try in the morning(after 8+hours ) ? you may want to consider checking the following, the next time the NO START issue pops up again : 1 Do a CPS test 2 do a fuel pressure test both tests can be found on this forum. good luck |
#6
|
|||
|
|||
My 92 500Sl m119 is having the exact issue. I presume it's the pump or the relay. I will be testing it tomorrow and will report back - otherwise PM me if I forget
Obvious question is, what's the commonality between an m119 and an m104 AMG in this area? If any?
__________________
former: 83 300D, 97 C230, 93 400E current: 08 C300 Luxury , 92 500SL |
#7
|
||||
|
||||
Problem solved!
It was a leaking Fuel Pressure Regulator. Thanks timmyr for pointing to the right direction. |
Bookmarks |
|
|