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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 02-02-2015, 10:13 PM   #1
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Join Date: Sep 2014
Location: Tucson, Arizona
Posts: 9
My Ride: 2000 323i
More BMW probz: Car won't start

Hey guys, so my 2000 323i with the M52 engine had been putting along fine with me as a happy owner when one night I was leaving a restaurant and my car would crank when I turned the key but would not start. I had it towed home and checked the fuel pump fuse as well as the secondary air pump fuse under the hood and both seemed to be just fine. I also switched the fuel pump relay with the horn relay that is behind the glove box (recommended by a few forums as a test since both relays are identical) to test if this was the issue and found no change here. I eventually broke down and changed the fuel pump only to find that it still wouldn't start. I also scanned the car and found it throwing two codes: P1624, which seems to be either the thermostat or pedal position sensor and P0101, which is for the mass air flow sensor. Before I spend any more money on a new fuel filter, is there any other reasons anyone might think that would keep my car from starting? I was also told that after a fuel pump change that I might need to purge the fuel lines to get the fuel going again but I did not see this on any of the fuel pump DIYs. The symptoms are that I turn the key, see all the accessory lights come on, hear the engine cranking, but it does not start.
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Old 02-02-2015, 10:50 PM   #2
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Join Date: Sep 2011
Location: TEXAS - Circuit of the Americas doing laps with my M5 and coming in for a pit stop.
Posts: 3,434
My Ride: 03 330iT SportWagon
Check your fuses in the E-box located in the engine compartment. If a fuse is blown, it will not start.
Engine swaps, HG, GM & ZF tranny rebuilds.

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Last edited by BMWCaptain; 02-04-2015 at 07:45 PM.
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Old 02-02-2015, 11:21 PM   #3
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Join Date: Sep 2014
Location: Tucson, Arizona
Posts: 9
My Ride: 2000 323i
Originally Posted by BMWCaptain View Post
Check your fuses in the E-box located in the engine compartment. If a fuse is blown, it will not stop.
I checked that fuse box, the little black box under the hood with the 30, 30, 20, 30, 30 fuses and it was fine, not blown.
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Old 02-02-2015, 11:44 PM   #4
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Join Date: Jan 2013
Location: Socal
Posts: 5,345
My Ride: 1.8T, XC70
Does the fuel pump prime?
If yes, check for spark.
See info in my no start thread!

GM No Reverse - posts 427, 439

"Would the codes indicate if it's the carburator?"
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cranking, fuel filter, fuel pump, starting

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