Could a fuel pump relay overfuel my engine? - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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Mike GSi

Member

Registered: 3rd Jan 07
Location: Ipswich, Suffolk Drives:Astra VXR
User status: Offline

9th May 09 at 18:04

The situation is:

Got the LET plugged in and wired in etc, started first time and ran fine, drove it down the road 2 mins, then left it, came back to it the next day to take it to work to fit the exhaust, and half way it died, just randomly.

towed it to work, and once it cooled down it started again (Next day) but very very lumpy and only just idling, when i add throttle, it just miss fires and stays at one point in the revs. then once it warms up it dies again.

Yesterday i found out that it was wired in wrong, but still well enough to make it run.

Ive noticed the fuel pump relay gets very hot, is there a high/low voltage or something coming from it? causing overfuel etc?

i have tried all the obvious things i.e plugs, leads, dizzy cap, coil, re- timed the cam belt. still no joy.

WHen the car runs it pours out pure black smoke, also when i cut the power to the fuel pump the engine runs faultless for about 5-10 seconds (untill the engine uses the left over fuel) then dies.

I have tried and checked everything else. Is this likely to be the problem and have any of you had a similar problem resulting into a fuel pump relay?

Thanks

SportBoy

Member

Registered: 5th Oct 01
Location: Retford, Nottinghamshire
User status: Offline

9th May 09 at 18:06

cts , air flow meter or o2 sensor? is management light on/wired up?

or an air leak?

[Edited on 09-05-2009 by SportBoy]

Mike GSi

Member

Registered: 3rd Jan 07
Location: Ipswich, Suffolk Drives:Astra VXR
User status: Offline

9th May 09 at 18:18

checked everything obvious

Mobby

Member

Registered: 31st Dec 07
Location: Leicestershire
User status: Offline

9th May 09 at 18:21

i thought the fuel relay just turned the fuel pump on and off?

SportBoy

Member

Registered: 5th Oct 01
Location: Retford, Nottinghamshire
User status: Offline

9th May 09 at 18:23

yeah but if its fvked ie he says it gets hot so that would be resistance . could be relay , take it you have checked your earths?

Ryan

Member

Registered: 23rd Jun 08
User status: Offline

9th May 09 at 18:23

i remember someone having a problem of a LET cutting out when hot and then not starting again. it was because the hot start valve thing wasnt wired in, even though you dont use it, it still needs to be wired up iirc.

i dont really know what im talking about though.lol

Luke

Member

Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline

9th May 09 at 18:30

quote:
Originally posted by SportBoy
yeah but if its fvked ie he says it gets hot so that would be resistance . could be relay , take it you have checked your earths?

I was going to say this!

When my relay packed in, it would be on constantly causing the battery to go flat & when the car would start it, it would pop, crack & spit massive blue flames.

Mike GSi

Member

Registered: 3rd Jan 07
Location: Ipswich, Suffolk Drives:Astra VXR
User status: Offline

9th May 09 at 18:38

thats what mine is doing, infact the battery was dead thismorning.

lil_g

Member

Registered: 29th Oct 06
User status: Offline

9th May 09 at 18:40

Was going to say when mine went it drained the battery over night

I picked a new one up off a vaux shop on ebay for around £18 IIRC, after mine packed in completely and it conked out and wouldn't start

Luke

Member

Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline

9th May 09 at 18:45

quote:
Originally posted by Mike GSi
thats what mine is doing, infact the battery was dead thismorning.

Get a relay then mike. Mine cost £12 off ebay, free delivery aswell. Or £33 if you want a GM one.

[Edited on 09-05-2009 by Luke]

Mike GSi

Member

Registered: 3rd Jan 07
Location: Ipswich, Suffolk Drives:Astra VXR
User status: Offline

9th May 09 at 22:32

Ok ill sort a new relay

thanks for the help guys

Nic Barnes

Member

Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline

9th May 09 at 22:35

yeah ive had issues with fuel pump relay once. had got water on the terminals as i hadnt put a gromit back in properly. was draining the battery and causing bad running when it was running as it kept trying to cut out etc.

pretty sure i have a fuel pump relay mike. let me know if you want it.

Mike GSi

Member

Registered: 3rd Jan 07
Location: Ipswich, Suffolk Drives:Astra VXR
User status: Offline

9th May 09 at 22:38

Thanks nic, might be able to collect one tomorrow

but if not ill defo let you know

Nic Barnes

Member

Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline

9th May 09 at 22:39

its just sat next to my computer was in full working order back in 2007 last time i used it.

Mike GSi

Member

Registered: 3rd Jan 07
Location: Ipswich, Suffolk Drives:Astra VXR
User status: Offline

9th May 09 at 22:41

Good call Ken, ill be in touch

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