Running carbs instead of injection?/Wiring loom needed?

[wedgtable]

Hi all,

I run my wedge as my everyday vehicle and have done for 18 months now, but she is really starting to limp.

I have had a persistent running problem which I have questioned on here before but having gone through all the options I have come up with 2 choices.

My mechanic put a set of range rover carbs on to get the car through the HC emission test for MOT.
The injection readings where 1844 for the injection and 1041 for the carbs (the limit being 1200ppm) he also reckoned that it cured the running problem.

So it follows: is it acceptable to run a wedge on carbs, what are the pros and cons, and what do I need to type into ebays magic searchey box?

The idea that the car runs better on carbs obviously leads me to think that there is a fault with the injection system and the fact that it is almost intermittent (there are other factors like temp and recent driving styles) leads me to a wiring loom issue.

I believe that the connectors under the drivers side dash have suffered water damage too.

Does any one know where I can get a replacement wiring loom?

Sorry to waffle on... and thanks in for taking the time to read.

Best wishes,

Mike

Edited by wedgtable on Tuesday 26th May 16:15

[Brap_Brap]

You shouldn't need a loom... I've never heard of an electric carb.
You've already got the required wiring for everything else. You will however need
to replace your fuel pump however as the pressure it puts out is much too high for
a carb. If you do look on ebay for a carb check out the 600 to 650CFM selection. You
shouldn't need anything larger for a stock lump.

[wedgtable]

Cool cheers Brapo, I was thinking the wiring loom damage may be effecting the fuel injection system??

I would prefer to keep the car the way it is meant to be, but if I can pick up a set of cheap carbs it may be quicker/easier than fault finding all of the electrics.

[wedgtable]

Oh and is 600 to 650 good??? I assume it means cubic feet per minute?

Edited by wedgtable on Tuesday 26th May 17:43

[pwd95]

You'll be wanting one of these then.....

http://www.v8tuner.co.uk/product.php?id=100

Someone on here has a 390SE with one of these on, can't remember who now.

[heightswitch]

Rovers and Holleys produce big flat spots. a 600CFM holley is also a very big carb which will be a pig of a thing to set up. Most people use the smallest 390CFM on a Rover unless it is a big power tuned engine.

it sounds to me like you need to change your mechanic if he is telling you that your Fuel injection system will be bettered by some carbs and a new wiring loom??

Obviously a fuel injection set up is only as good as the bits making it work but inherently it should be fixable and more importantly very reliable in operation any good specialist should be able to diagnose and fix a problem, or indeed multiple probplems from lack of maintenance.

N.

[wedgtable]

Cheers guys,
that carb kit is just a touch over my price limit.

I do agree, this guy works very cheaply in his spare to time in return for rent on a horse field, so I am loosing faith very quickly.

I have taken the car to 2 "specialists" now so costs are already high.

Can any one recommend a good rover v8 mechanic who would at least be able to diagnose the problem,
I am based near Southampton Hampshire.

Thanks again,
Mike

[GV]

[quote=wedgtable]Hi all,

I run my wedge as my everyday vehicle and have done for 18 months now, but she is really starting to limp.

I have had a persistent running problem which I have questioned on here before but having gone through all the options I have come up with 2 choices.

My mechanic put a set of range rover carbs on to get the car through the HC emission test for MOT.
The injection readings where 1844 for the injection and 1041 for the carbs (the limit being 1200ppm) he also reckoned that it cured the running problem.

So it follows: is it acceptable to run a wedge on carbs, what are the pros and cons, and what do I need to type into ebays magic searchey box?

I've done the change over from EFi to Carbs...drop me a line and I'll tell you what you need to know.

[chris390]

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

webber / edelbrock been on nearly 2 years now - no problems at all and no more dodgy sensors, crappy connections or ifi ecu etc.
i think you realy need to be up to a 450se to need anything bigger than a 500 cfm but there are people on here that can offer more expert advice.
also just had mot done for second time with this set up , passed no prob.

[peaktorque]

My 350i used to be fitted with a 4.0 RV8 fitted with an Edelbrock carb.

The engine and carb were removed prior to me buying it (I bought it engine-less) so I have no idea how the setup was done or how it ran, however it was a bit of a bodge from what I can tell, as the original EFI fuel pump was used and to over come the issue of over supply the flow and return were joined at a 'Tee' piece in the engine bay with a single feed to the carb (I suspect that the fuel pump was none too pleased with this arrangement!). And a permanent live feed to the pump had been rigged up from the ignition switch

Fortunately for me as I was refitting EFI with the new engine, all of the original EFI wiring loom was cable-tied up behind 'that' panel that drops down onto your passengers legs . All I had to do is re-feed all the connectors and wiring back through the bulkhead aperture and plug and go (well nearly)

You may want to revert back to EFI in the future so it is possible to pull back the whole engine loom back through one hole and store it there still internally connected. Everything still worked.

My EFI was bought from ebay sourced from Range Rovers (I don't do carbs!), manifold, plenum, sensors, injectors, half a wiring loom etc... cost me £50.00, a good AFM £20 (from a Wedge actually) and two ECUs for £15. Apart from a split injector hose it has all worked perfectly.
Cheaper then a carb would have been.