en0tdc
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| posted on 4/7/06 at 07:04 AM |
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vfr anyone?!
right, im stuck! I have a vfr 800fiw. Its all hooked up on the bench, except the radiators. pretty sure everything i need to is wired around. It turns
over, but it just wont fire! I have a clear fuel filter and even tho the pump is runing, its not taking any in, so im thinking its the ecu. In the
haynes there is a fault checker but when i bridge the connector and run it, instead of flashing a code the light just comes on, which it suggests is a
dodgy ecu. Does anyone have any ideas?! Do you know if i can take the ecu to a honda garage for a check? unlikey to be a physical blockage is it?
any ideas welcome, im seriously running out!!
tom
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greglogan
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| posted on 4/7/06 at 07:25 AM |
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I'm far from an expert but surely if the pump is running and its not taking any fuel does it not suggest a leak in the line somewhere and its
taking air in there?
There is another possibility although I don't know how feasible it is. Is it possible the polarity for the pump has been reversed and the pump
is pumping the wrong way?
Hope this helps but it may just be the mindless rambling of an idiot....
Women are meant to be loved, not understood.
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en0tdc
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| posted on 4/7/06 at 07:37 AM |
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ive tried taking the fuel line off and it pumps thro so im pretty sure the pump polarity is fine. will check again for leaks but i think its ok. As i
say, the level of fuel in the filter isnt dropping at all so i dont think any is going thro.
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tks
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| posted on 4/7/06 at 08:01 AM |
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mhh
i know the vfr 800 1998 circuit on my thumb i also know the mcu realy good!
i bet its the pump. My sierra pump also sounds right when polarity is wrong.
but offcourse it doesn´t move any petrol.
Tks
The above comments are always meant to be from the above persons perspective.
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jambojeef
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| posted on 4/7/06 at 08:40 AM |
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Im sure you've tried this already but - is the fuel pressure regulator working properly?
Obviously if it was just letting petrol recirculate there would be no fuel pressure and the injectors would actually inject anything
Geoff
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en0tdc
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| posted on 5/7/06 at 11:17 AM |
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was reading the service guide last nite, it reckons the fuel pump needs to be kicking out 36psi at idle. Havent checked but im pretty sure mine will
be no where near that! Thats some serious pressure. Im thinkin investment in a new pump is my new plan of attack.
surely it cant just be that simple!
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coozer
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| posted on 5/7/06 at 06:16 PM |
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You call that simple? 
1972 V8 Jago
1980 Z750
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ChrisGamlin
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| posted on 5/7/06 at 10:02 PM |
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quote:
Originally posted by en0tdc
was reading the service guide last nite, it reckons the fuel pump needs to be kicking out 36psi at idle. Havent checked but im pretty sure mine will
be no where near that! Thats some serious pressure. Im thinkin investment in a new pump is my new plan of attack.
surely it cant just be that simple!
What pump are you using? The pressure your talking about there is about what you need for throttle bodies (fuel injection) which I assume you engine
is? If you've got a fuel pump from a carb'd engine though, then it will only be pumping a couple of psi at most, so as you say won't
be anywhere near what you need.
Chris
[Edited on 5/7/06 by ChrisGamlin]
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Simon
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| posted on 5/7/06 at 10:29 PM |
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If in doubt, you could try what I'd do (at your own expense of course ), and that'd be to chuck a couple of squirts of petrol into engine
via inlet. If it fires, you should have an idea where to start looking, if not look elsewhere.
ATB
Simon
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jollygreengiant
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| posted on 6/7/06 at 04:14 AM |
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quote:
Originally posted by Simon
If in doubt, you could try what I'd do (at your own expense of course), and that'd be to chuck a couple of squirts of petrol into engine
via inlet. If it fires, you should have an idea where to start looking, if not look elsewhere.
ATB
Simon
OR WD40 or Brake Cleaner. Either or will do.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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en0tdc
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| posted on 6/7/06 at 07:36 AM |
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quote:
Originally posted by ChrisGamlin
The pressure your talking about there is about what you need for throttle bodies (fuel injection) which I assume you engine is? If you've got a
fuel pump from a carb'd engine though, then it will only be pumping a couple of psi at most, so as you say won't be anywhere near what you
need.
Chris
[Edited on 5/7/06 by ChrisGamlin]
Yeah, Ive never played with a fuel injection engine before and doing me reading, Its exactly as your saying. It needs pressure in the rails to atomise
through the injectors. The pump I have on there is off a basic carbed car so Ill aquire an injection one and have another pop.
t
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tks
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| posted on 7/7/06 at 07:32 AM |
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duhh
with carb pump there is no pressure...!!
On my VFR i mounted a Sierra Fuel injection pump complete with its bracket...from the donor!
regards,
Tks
p.s. needless to say that it works a thread!
The above comments are always meant to be from the above persons perspective.
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en0tdc
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| posted on 11/7/06 at 07:02 AM |
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cheers guys, next question, is more pressure a problem? Will the pressure regulator deal with it and just dump it or will it put a shed load into the
cylinders!? I had a quick look on ebay and t seems to range from smal ones to uber powerful ones with not much in the middle!
cheers again!
tom
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tks
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| posted on 11/7/06 at 01:59 PM |
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mine
is from the 2.0 litre sierra
its the bosch one..wich has also a regulator on top of it.
the pressure values are just maximum if you are not giveing the pump the change to reach it their is no problem.
If i was you i would just take some tools to the scrapyard and take the bosch items back to home.
the sierra pump works fine! also take with you the connectors and some wire to make the enlargement.
TKs
p.d. Wich year is your vfr? mine is from 98
The above comments are always meant to be from the above persons perspective.
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