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Author Subject: HELP ASAP!!! new engine wont start
eddy_gti6

Seasoned Pro

Location: Durham

Registered: 20 Oct 2008

Posts: 8,716

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Post #1
i fitted my new engine yesterday got all the harness pluged in and put all the fluids in today.
just went to start it but it wont start, it all turns over fine but doesnt seem to want to start. any ideas? Huh?

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Posted 31st Aug 2009 at 22:39
daviewonder

Regular

Location: West sussex

Registered: 01 May 2009

Posts: 307

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Post #2
I know this sounds obvious but have you checked the fuel cut off switch?

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Posted 31st Aug 2009 at 22:40
fletch

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Location: The nearest Shell garage

Registered: 12 Jun 2004

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Post #3
Inertia switch, crank sensor connection, fuel pump, multifunction relay behind ecu...
Posted 31st Aug 2009 at 22:41
eddy_gti6

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Location: Durham

Registered: 20 Oct 2008

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Post #4
no mate, didnt think of that, al go give it a press now Big grin

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Posted 31st Aug 2009 at 22:42
eddy_gti6

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Post #5
Inertia switch??? whats that?

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Posted 31st Aug 2009 at 22:45
daviewonder

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Registered: 01 May 2009

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Post #6
eddy_gti6 wrote:
Inertia switch??? whats that?


I think its the posh name for what I said Big grin

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Posted 31st Aug 2009 at 22:47
willygti

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Location: Exeter

Registered: 08 Oct 2007

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Post #7
the button above the battery box, its either red or black.

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Posted 31st Aug 2009 at 22:51
eddy_gti6

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Location: Durham

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Post #8
red lol. tried it, didnt work, checked fuses, there ok, fuel pump doesnt sound like its working but just checked and there is fuel coming through

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Posted 31st Aug 2009 at 23:24
eddy_gti6

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Post #9
do i have to get my ecu unlocked if i am running a new engine? just i am using my old wiring look, ecu and box

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Posted 31st Aug 2009 at 23:26
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

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Post #10
ECU should be fine if you are using the same ECU, transponder and key. Yes

When you turn the ignition on to the second click, can you hear the fuel pump prime? If not, check the red and black relay which is attached to the back of the ECU box. Yes

It is held on with a single 8mm nut, make sure you rememebered to plug this in. Yes

Also check crank and cam sensors are plugged in. Yes

Stan.

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Posted 31st Aug 2009 at 23:33
eddy_gti6

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Location: Durham

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Post #11
i cant here the fuel pump prime, i will go and check the plug beging the ecu now.
i will be back to let yous no if i ahve any luck LOL

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Posted 31st Aug 2009 at 23:41
eddy_gti6

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Post #12
right lads i am 100% sure its my fuel pump not working. any idea what i can do to fix this?

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Posted 1st Sep 2009 at 00:03
birk

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Location: Doncaster

Registered: 24 Oct 2005

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Post #13
Use a make shit gravity fed fuel pump, big bottle with fuel in it higher than the fuel rail with a pipe going into the fuel pipe feed, then a pipe from the return feed line into a bottle lower than the fuel rail, then you will know if it works or not.

Or you could just get a new fuel pump LOL

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Posted 1st Sep 2009 at 03:43
eddy_gti6

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Post #14
that sounds like a bit of a f*ck on LOL i am goin to check a few plugs tomorrow and if i cant get it started its going to the garage LOL easy way for me Big grin

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Posted 1st Sep 2009 at 04:14
welshpug!

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Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #15
you got 12v at the inertia switch?

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Posted 1st Sep 2009 at 04:20
eddy_gti6

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Post #16
i am geting 12v on my volt gauge meter if that helps?

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Posted 1st Sep 2009 at 04:32
welshpug!

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Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #17
nope!!

you need to see if the ecu is sending the signal to the relay to power up the fuel pump.

without unlocking you wont get a prime, without crank you wont get any more.

with a buggered relay you'll get sod all.

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Posted 1st Sep 2009 at 04:37
rich-6

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Post #18
I was always under the impression that the ECU will lock itself if its unplugged from the car without the ignition turned on and will have to be sent off and unlocked for it to work again, Even if its for the same car it was removed Unsure

Or is that only transferring between cars?

You've said you are getting fuel, So the pump must be fine as must the Relay? Mine Couldnt be heard priming everytime you turned the key, It would only do it if it was left for a while.

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Posted 1st Sep 2009 at 05:09
eddy_gti6

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Location: Durham

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Post #19
so is that the red fuel cut of switch under the bonnet and is that what needs unlocking?

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Posted 1st Sep 2009 at 04:42
eddy_gti6

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Post #20
i have had no engine in my car since about the 15th august and just got my engine in yesterday and wired up. tried starting it but there is no sound from the fuel pump, i can usualy here my fuel pump when i go to start my car but since the new engine is in there is nothing. i will give it a good going over in the morning

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Posted 1st Sep 2009 at 05:09
eddy_gti6

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Post #21
i am not getting any fuel or a spark from the plugs. any ideas???

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Posted 1st Sep 2009 at 16:32
jcphat

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Registered: 22 Feb 2008

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Post #22
It sounds as if the immobiliser is playing up the fuel and sparks will not work if the key and ecu are not from the same car or if the connectors are dud so double check that each of the connectors is clean and fully engaged also check the engine earthing.

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Posted 1st Sep 2009 at 16:38
cress87

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Post #23
As lots of others have suggested, check the relay box on the back of the battery box. If you unplug it and short out two of the pins on the loom plug then you should hear the fuel pump run.

Short pins 5 and 8 on the loom plug. If the pump works then the relay is fubarred.

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Posted 1st Sep 2009 at 16:40
eddy_gti6

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Location: Durham

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Post #24
key and ecu are from the same car, i tried bridging 5 & 8 on that plug and there is nothing

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Posted 1st Sep 2009 at 17:19
hman205

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Location: Bristol

Registered: 27 Jun 2005

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Post #25
Try resetting the ECU

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Posted 1st Sep 2009 at 19:02

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