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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)

E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 04-29-2016, 01:24 PM
srhaddon1 srhaddon1 is offline
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2002 bmw 325i No Start

Ok so my bimmer has been throwing the following codes- P0171, P0174, 1085, 0444.....
The car has randomly been stalling out, only at low speeds or when shifting from drive into reverse or reverse to drive.

I have had the front oxygen sensors changed and it drove a little bit better. Then I had a new Mass airflow sensor put on, but this problem has persisted. I put a new gasket on the DISA valve and it drove somewhat better, but I am still not getting the full power, and the CEL is still on..

The next thing I did was attempt to change the fuel filter. I went to autozone to get the part, and went ahead and pulled fuse number 54, then attempted to start the car (to make sure it wouldn't start) then lifted the car up and went under to get the old filter. Then I discovered that the filter autozone gave me had only one line connection for each side, instead of two on each side like the filter I had just taken off.

So I put the old filter on, put fuse 54 back in, and attempted to start the car. The car would not start. It turns over but won't start. I made sure the arrow is facing toward the front of the car. I am not sure what else to check or what to do. HELP..... Could the fuel pump have gone bad?


Also, while under the car, while it was lifted up I noticed that oil was leaking.
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  #2  
Old 04-29-2016, 01:38 PM
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bimmer765 bimmer765 is offline
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I would listen to see if the fuel pump is priming when you first turn the key on. The oil leaks could be from the valve cover, oil filter housing or the oil pan.
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Old 04-29-2016, 01:53 PM
srhaddon1 srhaddon1 is offline
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Originally Posted by bimmer765 View Post
I would listen to see if the fuel pump is priming when you first turn the key on. The oil leaks could be from the valve cover, oil filter housing or the oil pan.
When i turn the key twice and have the door I can hear the buzzing sound which is the fuel pump priming. I just cant figure out why it wont start now
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  #4  
Old 04-29-2016, 03:01 PM
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bimmer765 bimmer765 is offline
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See if your getting fuel pressure at the fuel rail. There is also a fuse under the hood that could be blown. Does your tach jump when your cranking it?
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Old 04-29-2016, 04:49 PM
srhaddon1 srhaddon1 is offline
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Originally Posted by bimmer765 View Post
See if your getting fuel pressure at the fuel rail. There is also a fuse under the hood that could be blown. Does your tach jump when your cranking it?
The tach jumps but just barely. What fuse is this and can you tell me where it is? Im a noob with bimmers. As far as the fuel rail to check the pressure do i actually need the test kit? I know on older camaros you just had to press the valve with a screwdriver and if it had pressure it would squirt fuel. I actually tried that on the bimmer but nothing happened
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  #6  
Old 04-29-2016, 05:15 PM
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bimmer765 bimmer765 is offline
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That fuse should be good if the tach is jumping. You should get fuel out the schrader valve under pressure.
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  #7  
Old 04-29-2016, 05:17 PM
srhaddon1 srhaddon1 is offline
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No fuel came out.
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  #8  
Old 04-29-2016, 05:21 PM
srhaddon1 srhaddon1 is offline
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What would be your next suggestion?
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  #9  
Old 04-29-2016, 05:24 PM
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bimmer765 bimmer765 is offline
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Check at the fuel filter inlet with the key on.
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  #10  
Old 04-29-2016, 06:12 PM
cvx5832 cvx5832 is online now
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OP - check if you switched the fuel filter lines. It's happened. If that is good then the fuel pump is my next suspect for a car that old.

It's good you replaced the oxygen sensors, but know those probably had nothing to do with your issues. Those are lean codes, not bad O2 sensor codes. Same with the MAF. You have a vacuum leak or a fuel delivery problem.
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  #11  
Old 04-29-2016, 06:40 PM
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bimmer765 bimmer765 is offline
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Check over all the ccv valve plastic lines. Also check the smaller lines for the smog pump.
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  #12  
Old 04-30-2016, 05:31 AM
marcozandrini marcozandrini is offline
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The p0171/0174 codes are classic indicators of vacuum leaks. Fix those first. Out the original MAF back in the car. It's the most reliable part under the hood. Stop throwing parts at the car!
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  #13  
Old 05-01-2016, 12:11 PM
srhaddon1 srhaddon1 is offline
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I had the car looked over by a mechanic and he says its the fuel pump and quoted me about 500 bucks to do it (part and labor. He claims he will have to lift the car in the air because the pump cant be accessed through the seat which is a lie I've seen videos on this on youtube where it only takes minutes to swap the pump).

After he left I lifted the seat up, took the four nuts off and looked down directly at the fuel pump. I believe it is the original for this car and that it probably more than likely is the problem as it was so dirty and showed signs of age.

The only thing that gets me is that prior to the attempt on the fuel filter change where I pulled fuse 54, the car started. It was a hard start though, but still........

BTW, the mechanic didn't check the fuel pump relay, he just had me start it a few times while he listened, and then he rocked the car back and forth as I tried to start it.
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  #14  
Old 05-01-2016, 01:37 PM
marcozandrini marcozandrini is offline
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The fuel pump is located in the right gas tank. You access it by removing the rear lower seat cushion, removing a panel and removing the ring. It's not located under the car! The fuel filter IS located under the car. It's inboard of the left frame rail under the left front seat.
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  #15  
Old 05-01-2016, 01:38 PM
Carmania24 Carmania24 is offline
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Quote:
Originally Posted by marcozandrini View Post
The p0171/0174 codes are classic indicators of vacuum leaks. Fix those first. Out the original MAF back in the car. It's the most reliable part under the hood. Stop throwing parts at the car!
+1. But glad to hear the problem was found. However, you're still going to have a vacuum leak(s). I don't have a CEL, but the P0171/0174 codes are still pending in my computer and I have no idea where leak is.
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  #16  
Old 05-01-2016, 02:05 PM
marcozandrini marcozandrini is offline
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Only a proper smoke test will let you find all the leaks.
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  #17  
Old 05-01-2016, 02:52 PM
Carmania24 Carmania24 is offline
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Originally Posted by marcozandrini View Post
Only a proper smoke test will let you find all the leaks.
Alright I will have to find a shop around me that does it.
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