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HOTWIRE ON 4.6 ROVER V8 IN DISCO 1
Posted: Sun Jan 02, 2011 9:41 pm
by chrisbowler
Help and advice needed. I have just finished converting a 4.6 GEMS block to HOTWIRE with 3.9 SERP front end and standard distributor. Problem I now have is it only runs on 2 cylinders ( only 2 header pipes are hot - rest are stone cold. The 2cyls running are 4 and 6.
I assume that HOTWIRE fires the injectors in 2 banks - if so is this a wiring loom problem - the whole HOTWIRE SYSTEM WAS WORKING 3 DAYS AGO WHEN IT WAS ON THE ORIGIBAL 3.9 BLOCK
Any suggestions appreciated.
Chris Bowler
Posted: Thu Jan 06, 2011 11:56 am
by CastleMGBV8
Chris,
First check if the non firing cylinders have wet plugs ie fuel is being injected.
2/ check firing order of plug leads.
Kevin.
Posted: Thu Jan 06, 2011 2:46 pm
by kiwicar
Have you got a nice solid earth on the engine?
Is the distributor on the right TDC cylinder 1
again plug lead order
Dry the plugs out with a blow tourch, install them hot and hit the starter, see what happens, it may clear a fouled plug or two.
Best of luck
Mike
Posted: Sun Jan 09, 2011 10:02 pm
by chrisbowler
Right - I think we have solved this problem - I changed all injectors and the fuel rail - took it off another engine. Car now runs on all 8 although could do with a bit of a tune
4.6 in a pick up Disco does go well though!!!!!!!!!!!!!
Many thanks for help
Chris Bowler
Posted: Mon Jan 10, 2011 7:15 am
by Eliot
chrisbowler wrote:
4.6 in a pick up Disco does go well though!!!!!!!!!!!!!
Chris Bowler
5.7 turbo in a classic/dakar is fairly interesting
Posted: Mon Jan 10, 2011 8:40 am
by DaveEFI
chrisbowler wrote:Right - I think we have solved this problem - I changed all injectors and the fuel rail - took it off another engine. Car now runs on all 8 although could do with a bit of a tune
4.6 in a pick up Disco does go well though!!!!!!!!!!!!!
Many thanks for help
Chris Bowler
The chances of several injectors failing suddenly is pretty low.
Posted: Tue Jan 11, 2011 7:34 pm
by chrisbowler
I agree that injectors all failing at the same time is rare - in defence, the engine had only recently been fitted before it had to be changed for the 4.6 - so I am wondering if dirt in the fuel tank caused the injectrors to fail when they were fitted to the 3.9 engine. The 3.9 was removed because 1 cylinder lost all compression through the rings so I decided to fit the 4.6 short block but used all the 3.9 efi system.
All I know is that after swapping out the fuel rail with another set, it now works.
Chris Bowler