EVAP Purge Valve Flow

Under the intake manifold and close to the front.

See pic....

I learn something about my 528i

I thank you so much for the information you have given me. I was looking over it the whole time not really knowing what I was looking for. Your picture was very helpful. Thanks again.

Hasamu

i have the same code that pulled up on my 2000 528i i just bought .

so did changeing just the "purge flow valve" in the photo/ work or did you also need to change the EGR ?

thkx to "SEARCH" button !!

I'm trying to find this purge valve in my E39 diagrams.

Is 'this' it?

What does it to (i.e., how does it work)?

- Fuel Preparation System => Fuel injection system => FUEL TANK BREATHER VALVE
- 01 FUEL TANK BREATHER VALVE Qty=1 PN=13901433603 $82.88

That's it. The DME controls it. One hose goes to the charcoal cannister that is connected to the fuel tank.
The other hose connects to the intake manifold
The charcoal absorbs fuel vapors, in the old days the tank was vented to atmosphere.
The purge valve allows the vapors to be sucked out of the charcoal and into the engine.

I had this code. My Indy Mechanic traced to a leaky hose behind the rear driver side wheel.
He also showed me an M3 with the same broken hose.
He installed a used hose.

See also:
- Debugging the gasoline evap purge valve sensor and purge control valve evaporative emissions fuel system vapor recovery P0440 P0441 P0442 P0444 P0445 P0446 P0451 P1403 and other fuel tank breather valve and gas cap leak obd codes (1) & a fuel injection LDP leak detection pump DIY (1) & a fuel system charcoal canister R&R DIY (1) & where is the fuel tank breather valve located (1) & tricks for resolving the P0455 diagnostic trouble code when the missing gas cap is replaced (1) & does spilled gasoline really go into the charcoal canister via the two steel vent holes in the fuel filler canister at the 3 o'clock and 9 o'clock position and why is there a hole in the 6 o'clock position of my fuel filler hole rubber gasket (1)

BMW E39 528i Engine Sensor Wiring Colors

Did you find your Evap code problem source, what was the problem?

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BMW E39 528i Engine Sensor Wiring Colors
I posted this on another thread before, but no one commented, now my BMW is not passing smog, and the last time it barely passed, the hydrocarbon

I have asked this before but still have not resolved my issue, I have a date 3/1998 BMW E39 528, the engine was changed with a lower
mileage 2.8 liter after I cracked my cylinder head when it over heated due to a serpentine belt idler pulley failing. The mechanic installed
my engine sensor connectors incorrectly, he didn't label them first and thought that they were each unique like on a Ford.

Those sensor plugs are not different, they are either two or three prong and can be hooked up to the wrong sensor and the engine will
still run. 5 sensors were incorrectly connected and I was able to correct them and my engine check light turned off, but I have a power
issue at 2000 rpm, and the last smog I had they stated that the hydrocarbons was high, my gas mileage is down, and it smells funny out
the exhaust pipe, although I do not see blue smoke. I think two of two prong sensors are still hooked up wrong, the wiring did not match
Speghetti Wiring code for the 98 on one sensor. I may also have a vacuum leak, and need a new CCV valve, so I should also do that while
I am at it.

Funny thing is if I reverse the Evap Purge valve sensor connector with another sensor it runs better and has more low end power but the check engine light comes back on about every 100 miles, even after resetting it, that's why I need a visual on a another BMW 528 for comparison, so I can trace if I had a bad sensor or not. I also have no computer code error currently.

http://www.bmwtech.ru/wds/

I have a Peak Research Scanner, it shows no computer codes, all 4 Oxygen sensors were replaced when the engine was changed. I haven't
done a compression test yet, but I wonder if one of the cylinders may be low, and I need to soak it in AC DElco fuel injector cleaner over night to free the carbon on the rings.

Idle is smooth and does not fluctuate, just seems to have a low power at 2000 rpm and poor gas mileage, I use to get 31 miles to the gallon
on the freeway, and 18 around town on the last engine with 200,000miles.

Could some one please make a video on the 97-98 engine sensor's wiring color code to each engine sensor underneath the intake manifold?

Thank you in advance for your help,

Jose F. Medeiros
408-256-0649
" If there is wrong, those who have the ability to take action have the responsibility to take action."