About a month ago my car would crank but not starting. After letting it sit a week I got it started and then it started misfiring in cylinder 6 so I shut it off and it wouldn’t turn back on just crank.

I changed all 6 spark plugs but this time no start just cranking. Ended up replacing the fuel pump assuming fuel wasn’t getting to the injectors. The car finally started again with no issues and I test drove it for about 30 minutes until it started misfiring.

Drove home immediately and codes are P0300 random/multiple misfire, P0301 cylinder 1 misfire, P0304 cylinder 4 misfire.

Not sure what the issue is now after replacing fuel pump and changing the spark plugs.

 

Read the fuel pressure data to see it is correct.
What engine and associated mileage?
What maintenance was done.

I don't think a dirty fuel filter would begin by a "no start". So double-check the chassis voltage iand charging current are as expected
voltage greater than 14.0V
Amperage current much lower than 20Amps Max

 

What brand fuel pump did you install?

 

A Mercedes specific scanner will be able to tell you the fuel pressure, if the pump was faulty. Mine has an option to test the fuel injectors, haven't tested them though.

 

Is that a MB specific scanner and could it clear a background P0087 code? My bluedriver can't and the shop will charge $175 to do it. What model?

 

It is the Foxwell NT530 w/Mercedes software package. I think its the same exact software in the NT510 and NT710 OBD scanners also. The NT510 is a smaller scanner, NT530 is a little bigger screen and detachable cable, the NT710 is the larger tablet version.

The reason I got it was it was listed as an all-system scanner and I found one for a great price "Used-Like New", want to say it was less than $100. It was in brand new condition when I received it except it had already been registered by someone previously, I wasn't able to register it and download the updated software. It comes with free lifetime updates. I jumped the gun and complained to Amazon and wanted to return it, they told me it was a non-returnable item for some reason and to just keep it and they refunded my money. I emailed Foxwell about the issue and they responded by clearing it on there end and then I was able to register it, works perfectly. I will say I emailed Foxwell on a Friday night and they responded the following Monday, even sent a follow-up email asking if the issue was resolved. So they do seem to have good customer service.

I havent had that code before but im assuming it can clear most codes. It also works as a "basic" scanner to all other cars, my neighbor has a Jeep and it was able to read his codes and even clear them.




I have only just played around with it, I haven't had a need to really use it so far.