1998 ml320 won’t start sometimes
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Newbie
Joined: Oct 2019
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From: Ft.lauderdale
1998 ml320
1998 ml320 won’t start sometimes
So I have read many posts on here and have to sign up and make my own. I have a 1998 ML 320. I have a new CPS sensor new camshaft sensor new ignition coils new spark plugs new fuel injectors new fuel pump new fuel filter new mass airflow sensor. And yet I still am having trouble starting my car once in a while. The car runs fantastic when it starts no stalls no issues with acceleration. But sometimes when I try to start it cold it coughs and won’t start for a crank or two. And after it starts finally and runs for a while it gives me trouble starting back up. Almost sounds like it’s out of fuel but the fuel pressure is where it supposed to be. I honestly don’t know where my problem lies now,because it still giving me problems starting, can anyone point me in a direction to actually fix my starting issue? I have read about the ebox fan but don't think that’s my problem. Thanks
Thread Starter
Newbie
Joined: Oct 2019
Posts: 7
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From: Ft.lauderdale
1998 ml320
Fuel pressure is at 55 psi and i have a fuel pressure gauge, i was losing pressure before, changed the pump and filter and still lost pressure, just didnt the injectors last week, and finally have good pressure even when i turn car off, i was losing pressure before, now the pressure is constant
Thread Starter
Newbie
Joined: Oct 2019
Posts: 7
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From: Ft.lauderdale
1998 ml320
Yes, i still have a problem starting it now and then, sometimes when its cold and most times when its hot from running, and most of the time when i do have the problem sounds like a cough or a like a backfire cough when you start it.
Thread Starter
Newbie
Joined: Oct 2019
Posts: 7
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From: Ft.lauderdale
1998 ml320
I just walked out and started the ml right up, started 3 times for me with no problems , my brother pointed out that you can smell the gas when you start the car and can hear a slight rattle which I think is coming from the cat maybe. Would a bad cat give me a problem like this?
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Thread Starter
Newbie
Joined: Oct 2019
Posts: 7
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From: Ft.lauderdale
1998 ml320
Im not smelling gas in the car, and checked to make sure it was sealed with no leaks before i covered the pump back up, the gas smell im getting is from outside of the car, like a rich gas smell
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
If you want to check the CATS, buy and Exhaust Back Pressure Gauge. Remove the front O2 sensor and install the gauge. Start the eng. and any reading above ZERO means the CAT is damaged. Then do the same to the other sensor.
