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Gtir Motorsport club » Tech room » Help and Advice » Changing injectors and fuel rail

Changing injectors and fuel rail

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1 Changing injectors and fuel rail on 25th April 2014, 3:11 pm

Hardy172cup

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the one star club
the one star club
Ive decided I'm gooing to change over my fuel rail with all the injectors and fuel pressure regulator from my old engine baceause my car is starting to run more and more like a bag of shit!

Any advice on doing this? because I've never fitted an injector in my life so I could do with some advice before I attempt to do anything.

Any help and advice appreciated guys,
Cheers.

2 Re: Changing injectors and fuel rail on 25th April 2014, 3:41 pm

GTI-R US

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Management
Management
just unbolt the fuel rail (5 hex bolts) remove the fuel pipes (remember return goes back on fpr side) a bit of fuel will spray out so don't have a fag in your mouth or youll have no eyebrows left like me lol.
gently lever injectors out by lifting the rail up.
make sure all the lower seals are in the plenum when replacing and o rings are on top of the new injectors
that's it, easy as that bill


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3 Re: Changing injectors and fuel rail on 25th April 2014, 3:48 pm

Hardy172cup

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Cheers bob, I'll remove the rail from my old engine first that way I can get an idea of how it goes before I take the rail of my car.
I just want to rule out the if FPR and injectors are being problematic.

4 Re: Changing injectors and fuel rail on 25th April 2014, 3:53 pm

GTI-R US

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I doubt it but no harm in trying them

read what wrc wrote, spark blowout is more thasn likely due to the big gaps your now running


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5 Re: Changing injectors and fuel rail on 25th April 2014, 3:53 pm

Stu

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Admin
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Just check the rubber hose on the fpr Bill. Often it corrodes or splits and this can cause the car to run like shit. If it looks cracked or split at the end just cut a bit off the end and that usually does the trick.

http://www.j10-meets.co.uk

6 Re: Changing injectors and fuel rail on 25th April 2014, 3:58 pm

wrc

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I wouldnt go mucking about changing a fuel rail, generally if you have a fuel/fps/injector problem it would be much more pronounced than that you have been describing. Check your other post.

7 Re: Changing injectors and fuel rail on 25th April 2014, 4:23 pm

Hardy172cup

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Plug gaps are at 0.7mm now bob with new plugs

8 Re: Changing injectors and fuel rail on 25th April 2014, 4:27 pm

ROB_IOW

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the two star club
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Not a cracked plug is it ? You had em in and out enough times

9 Re: Changing injectors and fuel rail on 25th April 2014, 4:30 pm

Hardy172cup

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I don't think so mate, I'll check em but I bought 8 plygs when I bought them and I've been switching between one set of 4 and the other as I've been changing gaps and the problem has always been present.

10 Re: Changing injectors and fuel rail on 25th April 2014, 4:37 pm

Hardy172cup

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the one star club
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I don't think I'm experiencing spark blow out because plug gaps are now at 0.7 mm, I wouldn't know what spark blow out feels like but when I get the holding back sensation the engine is still running smooth and dosent seem to actually be missing or anything, just holding back and it happens on the transition of off boost to on boost at low revs, if you were to keep your foot in it will feel normal after a second or two

11 Re: Changing injectors and fuel rail on 25th April 2014, 5:43 pm

Whytie

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Check the earth or re earth the fuel pump

12 Re: Changing injectors and fuel rail on 25th April 2014, 9:37 pm

wrc

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Spark blow out and actual det can often feel similar, though blow up is more pronounced.

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