fuel pipe connections

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anonymous-user

Original Poster:

60 months

Thursday 22nd May 2014
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Can someone with a mk1 1.8 please confirm that I have my fuel hoses connected to the fuel rail the right way around?
My workshop manual doesn't specify which way they connect, so I've copied from a 1992 1.6, but I want to be sure it's correct on a 1.8 given that there is some sort of little vacuum thingy on one pipe on the fuel rail and I don't know if it will work with the hoses reversed.

Of the 2 metal pipes coming into the engine bay, I have the front pipe (and shorter fuel hose) connected to the rear inlet pipe on the fuel rail, and the rear pipe on the chassis uses the longer hose and bends around to the front fuel rail inlet.

thanks
James

fatjon

2,298 posts

219 months

Friday 23rd May 2014
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The one that lobs fuel out at high pressure for a couple of seconds when you turn on the ignition goes to the front of fuel rail, the other goes to the rear. Of course some caution is required when testing this!


snotrag

14,829 posts

217 months

Friday 23rd May 2014
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JimSuperSix said:
I have the front pipe (and shorter fuel hose) connected to the rear inlet pipe on the fuel rail, and the rear pipe on the chassis uses the longer hose and bends around to the front fuel rail inlet.
FYI The pipe at the rear is the return to the tank. The pipe at the front /forward end of the fuel rail is the inlet.

The funny vacuum you mention thing is the pressure regulator - that's why its at the end, after the injectors to regulate the relative fuel pressure they have behind them.

The feed, as above, is the one that squirts fuel out when you turn the ign on - only test this if your careful and sensible!

anonymous-user

Original Poster:

60 months

Friday 23rd May 2014
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OK thanks for the info. The longer pipe had a bit of pressure in it, so I guess that's the fuel feed. The car is now running, although it sounds very rattly at the top end at the moment, which I am hoping is just a stuck lifter and it will free up after a hot / cold cycle.

anonymous-user

Original Poster:

60 months

Saturday 24th May 2014
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Well I found the rattle - it was my home-made exhaust heatshield boxedin

It now just sounds like a diesel engine at idle, so I'm hoping that the old cambelt was installed a bit out so my line-up mark on the CAS is wrong and now the timing is off with the new belt, fingers crossed.... I'll get the timing gun on it later on and see what's what.