After HPFP Install, Engine Cranking, Not Starting

smadasam

New Member
Jul 27, 2019
4
After I replaced my motor like a month ago, my E90 ran fine for about a week or two; then, on the freeway, power starting to cut out until it completely died.

The codes I read at the time were: 2BE9, 2BDE, and 2BF0, which are related to low pressure in the high pressure fuel system. I figured the high pressure fuel pump had failed, so I ordered a new HPFP, gaskets, and sensor and installed them.

After installing everything, the motor cranks, but it is not starting. I am new to BMWs but, generally that means either you don't have fuel or spark. There wasn't any codes at this point.

Other thing of note, I installed the Radium Engineering LPFP setup while we swapped the motor.

Anyway, I am a little frustrated with this car at this point. What could possibly be wrong, and what are the next diagnosis steps?

Thanks!
 

NoQuarter

Captain
Nov 24, 2017
1,193
Indiana, USA
Agreed. Jumping straight to the hpfp replacement was the mistake. Don't let that get you down- no one ever regretted having a brand new one.

You should be able to measure lpfp pressure.
 

fmorelli

Brigadier General
Staff member
Aug 11, 2017
2,617
Virginia
Agree. I two cans of DeOxIt - cleaner and silver shield - in the garage. Every connector that ever comes apart gets cleaned and coated. Only one unhappy connection makes for many kinds of headaches, this being an example. Contacts become a weak link as cars get older. And as complexity goes up, as well as amperage draw of various components, well it's not a 1966 Mustang any more šŸ˜¬

Aside from a bad installation connection, you might want to do a visual inspection for general corrosion on your car. I'd check a few of the ground contact points, especially body contacts. There was a thread last year - a helluva read - where someone was driven nuts by a diagnosis. @Rcboosted2007 stayed on the problem like a cheap suit. The result was that they found a corrosion issue, and it was hidden in a wheel well. I'm not saying this to be hyperbolic, but probably wise just to do a pass through your car and see if you have a higher concern for contact corrosion.

Best of luck, let us know how it goes.

Filippo
 
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