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Author Subject: 044 pump killing engine
pete_rallye

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Location: Yorkshire

Registered: 12 Dec 2002

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Post #126
Can't honestly see it being either. If the battery can turn the starter over its got enough juice to run a 044 pump for more than a second. My car has 2x044 pumps and 2x intank pumps running from a race battery, and even when it won't turn the engine over and I use a jump battery it runs fine, and thats with a tiny 50amp alternator. My money is still on the reg!

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Oulton Park in a BTCC 306 vid 1
Oulton Park in a BTCC 306 vid 2
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Posted 23rd Mar 2015 at 22:10
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pugheaven

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Location: Fareham

Registered: 17 Dec 2006

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Post #127
But it doesn't have time to over fuelas the 044 is on for a split second, I'm willing to give anything ago so thanks for all your advice Thumbs up
Posted 23rd Mar 2015 at 22:13
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pete-gti

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Post #128
Thinking reg aswell
Posted 23rd Mar 2015 at 22:18
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pete_rallye

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Post #129
I don't think its overfuelling, I reckon the reg is locking up and cutting the fuel off completely! Have you got a standard 3 bar reg you could swap it for? Does the reg run fixed rate or is it connected up to give variable rate?

________________________________________

Oulton Park in a BTCC 306 vid 1
Oulton Park in a BTCC 306 vid 2
Lap of the 'ring
Posted 23rd Mar 2015 at 22:18
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fatlapit

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Location: STOCKSFIELD

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Post #130
No not true. My fan used to kick in a cut the car because of the current draw from the length of wire from the dash to the fan. if dta is like omex you need a minimum voltage or it will shut down. Hence why i have relocated the relays and redone my wiring.

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Posted 23rd Mar 2015 at 22:18
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pete-gti

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Post #131
Might sound silly but could it be bad earth tripping it out?
Posted 23rd Mar 2015 at 22:19
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fatlapit

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Post #132
but why would the reg lock up??

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Posted 23rd Mar 2015 at 22:19
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pete_rallye

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Post #133
Because its knackered?! Lol, don't know but I do know that regulators can lock up if you give them too much on one side of them in one go. It wouldn't explain why it used to work and now doesn't unless it has gone faulty but I just can't see it been electrical if the batteries got enough juice to turn over a starter.

Saying that, we had a problem with a race car that every now and again it would lose its map and start running really badly. Restore the map and it was fine. Turned out that the cable supplying power to the ecu was so small that when you revved the engine hard and everything was working flat out, the voltage supply was dropping to below 10v and the ecu was throwing a wobbly. We found that by monitoring the voltage on the ecus software. Might be worth a look?

________________________________________

Oulton Park in a BTCC 306 vid 1
Oulton Park in a BTCC 306 vid 2
Lap of the 'ring
Posted 23rd Mar 2015 at 22:27
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pugheaven

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Post #134
Can't see it being a bad earth as all the leads are new, all farthing points are clean and bare metal as I used a rotary bonding brush to take all the paint off after the respray.

I'll try another reg but I dont have one at the mo, hopefully rich will have all the spares I need! It's bound to be something simple and rich will find the issue straight away
Posted 23rd Mar 2015 at 22:28
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fatlapit

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Post #135
I hope so bud cant wait to see her go

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Posted 23rd Mar 2015 at 22:30
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pete_rallye

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Post #136
fatlapit wrote:
I hope so bud cant wait to see her go


Think that goes for all of us!

________________________________________

Oulton Park in a BTCC 306 vid 1
Oulton Park in a BTCC 306 vid 2
Lap of the 'ring
Posted 23rd Mar 2015 at 22:31
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pugheaven

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Post #137
Thanks lads
Posted 23rd Mar 2015 at 22:43
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rich_w

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Post #138
I can't see it being the reg... not much to go wrong inside them - it's only a spring really! I hope it's not - that reg is a special order Bosch motorsport part, and is around £250!

Yes, I know there are cheaper 5 BAR regulators out there, but I didn't spare any expense Smile

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Contact Details:

rich@lynxpowerengineering.co.uk
07732 822546

Posted 24th Mar 2015 at 04:11
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pugheaven

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Post #139
Please don't be the reg, please don't be the reg, please don't be the reg..... At £250 I bloody hope it's not the reg lol
Posted 24th Mar 2015 at 08:17
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rallyeash

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Post #140
I don't think it's your reg.

If it's immediate shut down it's wiring. Get the laptop onto the DTA.

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Posted 24th Mar 2015 at 08:28
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bigbadbowen

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Post #141
Alternator and battery problem - just out of interest why are you running a racing battery ?
Posted 24th Mar 2015 at 08:46
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Ben_W

Formerly gpm

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Registered: 01 Sep 2007

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Post #142
rallyeash wrote:
I don't think it's your reg.

If it's immediate shut down it's wiring. Get the laptop onto the DTA.


This.

Shutting down immediately when you connect the other pump suggests a wiring/electrical issue with something. If it were the regulator, it would run for a few seconds whilst the fuel in the system is used up I'd imagine.

I'd be trying a known good 044 pump to start with and rule out any electrical fault with that. It there anyway you can be checking voltage across the coils etc when it shuts down? It definitely sounds like something in the system doesn't like the 044 pump and the only thing I can think of that would kill an engine instantly is lack of spark....

Is there any of the std immobilser stuff still fitted? It's not that cutting in is it?

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Posted 24th Mar 2015 at 09:29
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rallyeash

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Post #143
Run the 044 from a separate battery completely to the car. Including earth

________________________________________

230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 24th Mar 2015 at 09:29
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pugheaven

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Post #144
bigbadbowen wrote:
Alternator and battery problem - just out of interest why are you running a racing battery ?



Because race car lol in all seriousness it weighs half if not less than a standard battery and the dimma is all about saving weight

If it was the pump would it not short out when both pumps are connected with out me trying to start the engine?

Hope it's not the pump as I got it years ago and I can't see think automotive exchanging it even though it hasn't been used in the years iv owned it!

I'll try all that has been suggested when rich gets back as like a few have said me/rich need to see what the dta is doing
Posted 24th Mar 2015 at 09:38
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rallyeash

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Post #145
Something is spiking the system and the ecu is protecting itself.

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230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 24th Mar 2015 at 09:40
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pugheaven

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Post #146
I don't think the standard immobilser is wired to the ecu and even if it was surely it would kill the engine with just the standard pump making the car run
Posted 24th Mar 2015 at 09:43
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rallyeash

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Post #147
Have you bench tested the 044 itself?

________________________________________

230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 24th Mar 2015 at 09:46
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pugheaven

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Post #148
No not as such, but I did disconnect the line to the rail , turned the ignition on with just the standard pump connected electrically and there was a slow flow of fuel, I then connected the 044 electrically and the flow increased dramatically so in effect I have tested the pump for correct direction of flow and pressure
Posted 24th Mar 2015 at 10:00
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RallyeP6

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Registered: 11 Jul 2013

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Post #149
rallyeash wrote:
I don't think it's your reg.

If it's immediate shut down it's wiring. Get the laptop onto the DTA.


Do you know how to look at the diagnostic screen on the laptop?. My old E48 can run the injectors and coil as a test, if you do that with the injectors unplugged, fuel will flow from the pump and just return to the swirl pot/tank. At least you will know that there are no electrical issues.
Also when the engine dies instantly are both pumps still running for a couple of seconds after, like when it primes the fuel system?.
Posted 24th Mar 2015 at 13:31
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welshpug!

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Location: Bigend, Wales.

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Post #150
all you need to do is turn the ignition on, the ecu primes the pump each time you do that, and whenever it sees rpm it will run the pump.

so yeah, get a laptop plugged in and it'll give you an idea of voltages etc.

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Bring on the Trumpets.

Posted 24th Mar 2015 at 13:59
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