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PostPosted: Sun Aug 25, 2013 9:27 pm 
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Set my fuel pressure today to match what the old Haynes says - 2.5 bar at idle with the vacuum pipe disconnected and the pipe blocked off.

When I reconnected the vacuum line on the regulator the pressure actually went down a bit (car idling) when revved it does pick up a bit as it should but doesn't seem to change that much.

Messed with it because I was fairly sure the car was lean, think i've made it worse.

Does 2.5 at idle with that pipe off sound too low? Baring it mind it's more like 2 bar with the pipe back on it?

Now the car is missing all the time when revved and spluttering and generally all over the shop so it's obviously not right.

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PostPosted: Sun Aug 25, 2013 10:28 pm 
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I've got 2 Fiesta 2i/FRST Weber regulators spare if you want to try another.

I set mine exactly as you have - vac line disconnected. Dropping pressure with the Vac line on is normal.

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PostPosted: Sun Aug 25, 2013 11:16 pm 
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I have a spare I'll try that in the morning and see if it has any effect.

One concern I do have is how I have wired the pump - from the relay to the back of the car is 15 amp but the wire which feeds the relay is only 5 amp, as memory serves. I'm thinking to replace that section of wiring too to make sure there is enough juice getting to the pump.

Also today had a sod about with the TPS, on inspection it wasn't earthing very well as I had painted the inlet so cleaned all that off, cleaned the contacts and everything put it back together, made sod all difference though :(

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PostPosted: Mon Aug 26, 2013 7:33 am 
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Are you using a frst air temp sensor? 2i ones will cause oddness.

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PostPosted: Mon Aug 26, 2013 11:20 am 
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I am, although I think it may be the wrong one, I'll get a pic.

This morning's development - Haynes says the fuel pressure after a prime of the pump should be a minimum of 3 bar. Yesterday I had set my pressure with the car running and caused the problems, so today I adjusted the regulator to be 3 bar after a prime (before it was more like 2 bar) started it up and drove it and generally it seems a lot happier, although I have noticed that when I rev the car the pressure doesn't hold very well, it will raise up to around 3 bar as people say it should but it then tails off a bit, I'm really thinking now that my (MFI turbo) pump may be struggling... Although people say they are more than upto the job it might be duff.

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PostPosted: Mon Aug 26, 2013 11:09 pm 
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This is what I have. I can see that the plug has been changed on this.

I am on OFAC management, I have noticed OFAC cars with a round plug and different ACT sensor to what I have. Does anyone know for definite what the deal is with these?

Google turns up a lot of conflicting information.

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PostPosted: Tue Aug 27, 2013 7:42 am 
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I might have the whole injector part of the loom - does that come with the right plug? Think it was off an early 2i. Anyway - I digress, I have no idea on the plug or sensor, PF.com someone will know for sure and can help diagnose the running issue.

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PostPosted: Tue Aug 27, 2013 9:09 am 
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fuel pressure, it needs to be set static at 3BAR as far as i remember.
when vac pipe connected the pressure will drop, but the engine is sucking at that point so will still have a 3BAR differential.
on W.O.T. it will raise close to 3BAR again in the rail and above on boost.

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PostPosted: Tue Aug 27, 2013 2:08 pm 
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Can you explain that in a way that even I could understand please dude pmsl

Car running with the vacuum hose off the regulator and blocked I should have 3 bar on the gauge?

What's W.O.T mate?

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PostPosted: Tue Aug 27, 2013 2:24 pm 
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Wide Open Throttle

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PostPosted: Tue Aug 27, 2013 2:29 pm 
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Ahhh thankye

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PostPosted: Tue Aug 27, 2013 7:00 pm 
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Mannion @ FPE wrote:
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This is what I have. I can see that the plug has been changed on this.

I am on OFAC management, I have noticed OFAC cars with a round plug and different ACT sensor to what I have. Does anyone know for definite what the deal is with these?

Google turns up a lot of conflicting information.


Thats the right ACT sensor mate, xr2i ones fit directly into the inlet and the turbo ones go into a adapter which you have.

Chris.

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PostPosted: Tue Aug 27, 2013 8:09 pm 
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Thanks mate that's one less thing to think about.

I've got an odd injector - 4 blue and one greeny one - has the same numbers as the other but they clearly aren't a set so I've bought another set from eBay to clean up and fit and someone has been kind enough to lend me another pump so I can compare and see if mine is tired.

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