Help me guys
Thread Starter
Newbie
Joined: Jan 2011
Posts: 5
Likes: 0
2007 C230
Help me guys
Okay here is my deal, got home Friday night and all was good, went to start the car Saturday and the car is just turning over. No Codes no previous problems other than I replaced the magnets on the cam position sensor about 2 months ago. Only thing I have done recently is change the oil last week.
What I am thinking is its the CPS and just isn't popping a code because it hasn't ran since going bad? Other than that, maybe the fuel pump but I didn't have any problems starting or any of the normal fuel pump warnings.
If it is the CPS or something else where is the best place to purchase the part? Thanks ahead of time guys.
BTW 2007 C230 with a 7 speed.
What I am thinking is its the CPS and just isn't popping a code because it hasn't ran since going bad? Other than that, maybe the fuel pump but I didn't have any problems starting or any of the normal fuel pump warnings.
If it is the CPS or something else where is the best place to purchase the part? Thanks ahead of time guys.
BTW 2007 C230 with a 7 speed.
MBWorld Fanatic!
Joined: Sep 2010
Posts: 1,434
Likes: 4
From: Raleigh, NC
2005 C230K, 2019 Honda CR-V, '74 Lotus Europa
I'm new to Benzes but I would try to narrow it down. I would start to try to determine if you're getting spark and fuel.
You can at least determine if you're getting fuel pressure by relieving the fuel pressure (there should be a schrader valve that is used to relieve fuel pressure before changing the fuel filter). You could try that after you've tried cranking it. If you have no fuel pressure, that could be your problem.
To check for spark, you can get a checker at most auto parts stores. It's pen shaped and you touch it to a spark plug wire. It lights up if you have spark. Now what I don't know is if this will work on MBs because the coil basically sits on top of the plug so I don't know if there will be enough voltage before the coil to light the light in the pen.
You can at least determine if you're getting fuel pressure by relieving the fuel pressure (there should be a schrader valve that is used to relieve fuel pressure before changing the fuel filter). You could try that after you've tried cranking it. If you have no fuel pressure, that could be your problem.
To check for spark, you can get a checker at most auto parts stores. It's pen shaped and you touch it to a spark plug wire. It lights up if you have spark. Now what I don't know is if this will work on MBs because the coil basically sits on top of the plug so I don't know if there will be enough voltage before the coil to light the light in the pen.
Thread Starter
Newbie
Joined: Jan 2011
Posts: 5
Likes: 0
2007 C230
yeah voltage wise everything is good and its turning over like a champ it just isn't starting.
I have heard the Crankshaft position sensor causes the engine not to start, but does it turn over like normal when the sensor is dead?
I have heard the Crankshaft position sensor causes the engine not to start, but does it turn over like normal when the sensor is dead?
Super Member
Joined: Mar 2011
Posts: 546
Likes: 0
From: Jakarta, Indonesia
C240
Fortunately I haven't had the sensor problem you mentioned, but as far as I know it shouldn't have turned over and dies.. But there's no harm in checking, but shouldn't the dead sensor throw a malfunction warning?
Trending Topics
MBWorld Fanatic!
Joined: Feb 2009
Posts: 5,054
Likes: 11
From: fort worth, tx
06 C230 SS 6spd
take them apart and make sure its in properly. from there check your voltage from your battery to see if its giving the right amount. Have you tried jump starting the car to see if it cranks over?
MB World Stories
The Best of Mercedes & AMG
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Mercedes Teases Updated EQS With Steer-By-Wire and a Yoke
Verdad Gallardo
MBWorld Fanatic!
Joined: Feb 2009
Posts: 5,054
Likes: 11
From: fort worth, tx
06 C230 SS 6spd
if you battery has just enough juice can still try and crank. You check if its your battery by turning on the headlights then trying to crank the car, if the light starts to dim its the battery. But its sounds like something else. I'd check the CPS first since its what you tinkered with last.
MBWorld Fanatic!
Joined: Jul 2008
Posts: 8,384
Likes: 800
2019 G70 6MT & 2022 Ford Maverick XL
Thread Starter
Newbie
Joined: Jan 2011
Posts: 5
Likes: 0
2007 C230
in the process of removing the fuel pump the connection on the bottom of the top cap of the fuel pump had a burnt spot on it.
That's really nice to know something in my fuel tank got hot enough to burn a connector whether the pump shorted or the connection shorted its not cool.
That's really nice to know something in my fuel tank got hot enough to burn a connector whether the pump shorted or the connection shorted its not cool.
