Range Rover EFI

[dazzawhipple]

Hi have been offered a RR 1986 EFI but.............Has a big oil leak around the valley gasket and a miss fire

Interested as my daughter dont like the 90 but is the problems listed easy to fix??????

[Merlin]

Hi, the oil leak I can't help with but the misfire on mine when I bought it was caused by the ECU.  I borrowed one to try & that fixed it, suggest you try the same, expect to pay about £100 for a second hand one if that does fix it.--Cogs

[Range Rover Blues]

Try replacing the valley gasket with a composite one from Rimmer's.

Give us a bit more detail on the miss-fire, is it regular or irregular? what speed/load conditions or is it at idle? have you done a comp test?  Is it on LPG?

[Range Rover Blues]

BTW the 86 EFi is the flapper type, almost anything can cause miss-fire so look for air leaks and a bent flap in the airflow meter.  If you pay £100 for the ECU you were seen off, pay £40 ish and no more.

[The Fat Controller]

don't forget the distributor,the relucters in them some times play up.helped to do one on a RRC 1989 V8 got the part from mansfields.
please remember this is just a thought and gives you  something else to check if all else fails.

[Range Rover Blues]

That's a good point though, it could be ignition related.  Good news is the ignition and EFi are totally separate sytems and a good SUN or Crypton tuner should detect any fault in the ignition.

[dazzawhipple]

well I paid for it and hopefully it gets at my house in a couple of weeks
will any body lend me a working ecu so i can test the ecu out????

[Range Rover Blues]

Just confirm that it's the 3.5 with the 'flapper' EFi.  If so I'd get yourself a spare one anyway from e-blag.

[oakeedokee]

so what is this flapper thing that everyones going on about? have I got one? what does it look like? :?

[dazzawhipple]

so what is this flapper thing that everyones going on about? have I got one? what does it look like? :?

Um thank god someones asked that what the hell is a flapper cause im in a flap about this one :lol:  :lol:

[muddyweb]

It is the type of air-flow meter used on the engine.

There are two main types, the flapper type and the hotwire type.

The flapper type uses a big flapper and a potentiometer to measure the air flow, the hotwire uses... well, a hot wire ;-)

You can tell which you have by looking at them simply enough... it's quite an obvious difference.

[dazzawhipple]

Um got it now and I've had it running I think the engine is well past its sell by date

Oil leak is not an oil leak Oil system pressurizing and oil is coming up around dipstick......I think it could be a couple of thing oil pressure vale no releasing gummed up oil ways or engine expired (But sounds nice!!!!!!!)

Misfire is when the engine is warm only I.e. when running on auto choke everything seems fine when it comes of choke misfire like a pig......May be Airflow meter!!??

[Range Rover Blues]

Ours was doing the misfiring thing, turned out to be the ECU, that was a hot wire system though, the ECU costs a lot more S/H

The oil thing is very likely to be very excessive blow-by, worn out engine.  You could try an oil change with decernt 20w/50 but I don't think it will cure it.  Also try cleaning all the engine breathers, try running with the oil filler cap off.

[dazzawhipple]

Have all ready tried that i have remove the flame trap pipe from the plenuim chamber no oil leak then so engine has blow by or the air intake is blocked ??

Its funny the engine sounds very nice whilst running on choke I would have thought it would be running like pooh

I am keeping a eye out for a new engine now

the ecu will come to after doing the engine

[Range Rover Blues]

Try a new flame trap first, it's a lot cheaper.

[dazzawhipple]

Well I pick up a complete efi sysytem this weekend now to find a engine and replace the one thats in it.....................should have it ready for a MOT in about 4 weeks

List to do

Engine
EFI
Rear Exhaust
Front Side light/ indicator Driver side

Eblag for the last two

Darren

[MuddyMike]

These engines are prone to blowing oil out of the most unlikely places when the breathers are blocked. Before going to all the trouble of replacing the engine clean out all the breathers, flame traps etc. You may have to ream some bits out with a suitable drill bit if they have been alowed to get really badly clogged up.

My V8 blew loads of oil out of the distributor shaft when I first got it, new flame traps, new tubing and good clean out of all the breather ports and it has not lost a drop since.

Mike

[dazzawhipple]

Well Started to Change  the EfI system over to a know good one, found that the oil breather into the plenuim chamber was blocked, this may explain the pressure in the engine..........bad news is that its disorted the valley gasket so have now ordered a new gasket and end seals.

Its looking promising I will check all breathers and pipework as

bad bit is a cor plug needs renewing its one up by the exhaust manifold