OMG! Half Engine Light/Reduced Power!! NO

JesusFrEAk · 10-23-2008, 07:37 PM

Ok...so yesterday my I drove my car around all day..had no problems at all.

About 1 month ago for approximately 2 weeks. I would get a long crank at least once a day. Then, out of the blue it stopped.

Fast foward to this morning.........I get in my car to go to work. Turn it on and it has a long crank with supper hard idoling!!! I'm thinking no...then bing!

Half Engine Light/Reduce Power comes on.

I kind of paused for a second in disbelief and just stared at the gauge.

Then the idoling starts to get violently rough.

So I shut the car off immediately....wait about 1 minute and turn it back on.

The problem was gone and I havent had any long cranks or codes all day....

My only mod is the JB3 (older chip version).

I dont know what it could be, the only thing that comes to mind is the obvious stupid HPFP.

HELP!!!!!!!

cn555ic · 10-23-2008, 07:39 PM

Quote:

Originally Posted by JesusFrEAk

Ok...so yesterday my I drove my car around all day..had no problems at all.

About 1 month ago for approximately 2 weeks. I would get a long crank at least once a day. Then, out of the blue it stopped.

Fast foward to this morning.........I get in my car to go to work. Turn it on and it has a long crank with supper hard idoling!!! I'm thinking no...then bing!

Half Engine Light/Reduce Power comes on.

I kind of paused for a second in disbelief and just stared at the gauge.

Then the idoling starts to get violently rough.

So I shut the car off immediately....wait about 1 minute and turn it back on.

The problem was gone and I havent had any long cranks or codes all day....

My only mod is the JB3 (older chip version).

I dont know what it could be, the only thing that comes to mind is the obvious stupid HPFP.

HELP!!!!!!!

It could be a loose wire of somekind, recheck the wiring...or else the dreaded HPFP!

superlubricity · 10-23-2008, 07:40 PM

Take the car in to your dealership. It's likely your HPFP.

JesusFrEAk · 10-23-2008, 07:47 PM

thanks for the quick response guys.

I don't think a wire is lose its been fine all this time...with the exception to a some longs cranks over 1 month ago.

I thought even though the car is showing signs of HPFP failure that the dealership cant do anything till it ACTUALLY fails?

hummermaniac88 · 10-23-2008, 08:15 PM

Maybe update the chip to 1.1? Or Contact Terry asap!

JOe335i · 10-23-2008, 08:18 PM

from what i know if the JB3 was installed wrong it woul just crank and crank and not start, or just not crank at all. sounds like a HPFP to me.

i also heard you can bring it to bmw and they can run it on a pressure system to see if its within spec. but most liekly gonna have to wait until it fails completly

mistermojorizin · 10-23-2008, 08:27 PM

was it colder tonight? i know the 1.0 increases the boost in the higher rpms more aggressively than the 1.1. that's why 1.1 is better for pump gas.

JesusFrEAk · 10-23-2008, 08:51 PM

I dont think the weather has anything to do with...as I wasnt driving the car.

Went to bed, woke up in the morning, turned the car on to go to work and experienced the Half Engine/Reduce Power.

So I dont think the colder weather affected it.

Stupid dealer......they know its a problem but would rather let it fail, possibly leaving people stranded instead of fixing it when symptoms arise.

Unreal.

OpenFlash · 10-23-2008, 09:02 PM

Quote:

Originally Posted by JesusFrEAk

I dont think the weather has anything to do with...as I wasnt driving the car.

Went to bed, woke up in the morning, turned the car on to go to work and experienced the Half Engine/Reduce Power.

So I dont think the colder weather affected it.

Stupid dealer......they know its a problem but would rather let it fail, possibly leaving people stranded instead of fixing it when symptoms arise.

Unreal.

Is there a way to easily "bypass" the JB3? If not, removing it would seem to be the next logical step in the troubleshooting process.

Shiv

E92_335 · 10-23-2008, 10:07 PM

get a switch and flip to valet (stock) map and if you can't replicate the problem, its the jb3 but if u can then its probably your fuel pump

sambonator · 10-24-2008, 12:05 AM

Sounds like fuel pump... I had a similar experience, but never got a CEL or anything... car just sounded like a diesel, I didn't have any power, idled so rough the car was shaking. I shut the car down, restarted and its back to normal.

I think I need to take my car in for a new fuel pump

Tuned335i · 10-24-2008, 01:40 AM

Quote:

Originally Posted by superlubricity

Take the car in to your dealership. It's likely your HPFP.

It's the HPFP. And don't try to be a hero because you think you're buddy-buddy relationship with your SA is worth more to them than a big repair bill - that SA is worried more about their job than any pretend relationship with a car owner...remove the tune and any other drivetrain mods.

possible335i2008 · 10-24-2008, 08:09 AM

Quote:

Originally Posted by Tuned335i

It's the HPFP. And don't try to be a hero because you think you're buddy-buddy relationship with your SA is worth more to them than a big repair bill - that SA is worried more about their job than any pretend relationship with a car owner...remove the tune and any other drivetrain mods.

+1

10-23-2008, 07:37 PM	#1
JesusFrEAk First Lieutenant 18 Rep 394 Posts Drives: 2008 335i Join Date: Mar 2008 Location: Houston, TX. iTrader: (0)	OMG! Half Engine Light/Reduced Power!! NO Ok...so yesterday my I drove my car around all day..had no problems at all. About 1 month ago for approximately 2 weeks. I would get a long crank at least once a day. Then, out of the blue it stopped. Fast foward to this morning.........I get in my car to go to work. Turn it on and it has a long crank with supper hard idoling!!! I'm thinking no...then bing! Half Engine Light/Reduce Power comes on. I kind of paused for a second in disbelief and just stared at the gauge. Then the idoling starts to get violently rough. So I shut the car off immediately....wait about 1 minute and turn it back on. The problem was gone and I havent had any long cranks or codes all day.... My only mod is the JB3 (older chip version). I dont know what it could be, the only thing that comes to mind is the obvious stupid HPFP. HELP!!!!!!!
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10-23-2008, 07:40 PM	#3
superlubricity Captain 43 Rep 669 Posts Drives: '10 C63, '08 X3, '04 Ranger Join Date: Jul 2008 Location: Seattle, WA iTrader: (12) Garage List 2008 X3 3.0si [0.00] 2006 M5 - SOLD [0.00] 2008 Dinan S-335i C ... [10.00]	Take the car in to your dealership. It's likely your HPFP.
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10-23-2008, 07:47 PM	#4
JesusFrEAk First Lieutenant 18 Rep 394 Posts Drives: 2008 335i Join Date: Mar 2008 Location: Houston, TX. iTrader: (0)	thanks for the quick response guys. I don't think a wire is lose its been fine all this time...with the exception to a some longs cranks over 1 month ago. I thought even though the car is showing signs of HPFP failure that the dealership cant do anything till it ACTUALLY fails?
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10-23-2008, 08:15 PM	#5
hummermaniac88 335 here I come! 2 Rep 67 Posts Drives: 320i Join Date: Jan 2007 Location: Montreal iTrader: (0)	Maybe update the chip to 1.1? Or Contact Terry asap!
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10-23-2008, 08:18 PM	#6
JOe335i Lieutenant 28 Rep 525 Posts Drives: R32-08STI-e92335i Join Date: Feb 2007 Location: AUSTRIA iTrader: (0)	from what i know if the JB3 was installed wrong it woul just crank and crank and not start, or just not crank at all. sounds like a HPFP to me. i also heard you can bring it to bmw and they can run it on a pressure system to see if its within spec. but most liekly gonna have to wait until it fails completly
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10-23-2008, 08:27 PM	#7
mistermojorizin Lieutenant Colonel 40 Rep 1,657 Posts Drives: 135i Join Date: Apr 2008 Location: Los Angeles iTrader: (0)	was it colder tonight? i know the 1.0 increases the boost in the higher rpms more aggressively than the 1.1. that's why 1.1 is better for pump gas. __________________ "KOPEYKA" /// Titanium Silver / Black Leather / Gray Poplar / Sport Package / Premium Package / 6MT / Feb 08 Production
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10-23-2008, 08:51 PM	#8
JesusFrEAk First Lieutenant 18 Rep 394 Posts Drives: 2008 335i Join Date: Mar 2008 Location: Houston, TX. iTrader: (0)	I dont think the weather has anything to do with...as I wasnt driving the car. Went to bed, woke up in the morning, turned the car on to go to work and experienced the Half Engine/Reduce Power. So I dont think the colder weather affected it. Stupid dealer......they know its a problem but would rather let it fail, possibly leaving people stranded instead of fixing it when symptoms arise. Unreal.
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10-23-2008, 10:07 PM	#10
E92_335 Colonel 156 Rep 2,863 Posts Drives: G20 330i Join Date: Jun 2007 Location: CA iTrader: (7)	get a switch and flip to valet (stock) map and if you can't replicate the problem, its the jb3 but if u can then its probably your fuel pump __________________
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10-24-2008, 12:05 AM	#11
sambonator Samtaro! 121 Rep 2,601 Posts Drives: 2014 F32 N55 Alpinweiß Join Date: May 2007 Location: Newport Beach, CA, USA iTrader: (7)	Sounds like fuel pump... I had a similar experience, but never got a CEL or anything... car just sounded like a diesel, I didn't have any power, idled so rough the car was shaking. I shut the car down, restarted and its back to normal. I think I need to take my car in for a new fuel pump __________________
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