AuthorTopic: Crazy EFI  (Read 652 times)

0 Members and 1 Guest are viewing this topic.

Offline random_badger

  • Posts: 14
  • Attack: 100
    Defense: 100
    Attack Member
  • Karma: +0/-0
  • Referrals: 0
Crazy EFI
« on: May 19, 2007, 09:12:20 »
O.K., just fitted a 3.5 EFI into a racer, got the 4 wires from the efi loom, (permant live, ignition live, crack live and fuel pump feed) spliced into the car loom, the engine runs but goes to 3500 rpm and sits there. Air filter is off, potentiometer has been set to 290mV at throttle off, and the throttle linkage is right back in the foot off position, the idle speed adjuster is right in at slow and all this has made no difference. The engine is a lucas L type from an F registered range rover classic auto, it now has a manual box.

Don't have any idea where to go next as the normal problem is getting them to run not slowing them down, any ideas would be gratefully accepted
2000 Disco 2 Td5 ES

QT Road going (maybe) 3.5 V8 *tax exempt* laughing all the way to the treasury :D

Whats fallen off it now?????

Offline lrmike

  • Posts: 122
  • Attack: 100
    Defense: 100
    Attack Member
  • Karma: +0/-0
  • Referrals: 0
Crazy EFI
« Reply #1 on: May 22, 2007, 01:14:28 »
First thing that comes to mind is a BIG vacuum leak (like a brake booster hose).  Second is the idle speed motor not working properly.  It does not have a spring or such to pull the idle down, the ECU has to move it about.
Never done a conversion like you have there, only fixed a bunch of 'normal' ones.  I assume you still have the code box on the truck somewhere - check it for a clue?

Good luck!
If it's not leaking, it's out of oil

'94 Disco - PVMT SUX
'96 Ford F-250, 7.3L Powerstroke Diesel
'63 Singer Vogue (hers)
'98 Discovery - GREEN LN (also hers)
"Is there a floor in that garage under all that stuff?"

Offline Rossko

  • Posts: 297
  • Attack: 100
    Defense: 100
    Attack Member
  • Karma: +0/-0
  • Referrals: 0
Crazy EFI
« Reply #2 on: May 22, 2007, 22:17:43 »
The flapper type EFI have an 'extra air' thingy on autos, that isn't present on manuals.  An in-line valve in what looks like a breather hose lying under the plenum 'neck'.  If you've got that, try pulling the wires off? Ah wait that's tosh you have an idle stepper so must be hot-wire. But leads to a thought ...

Hot-wire gives a little boost to idle when autobox put in D or R via the stepper motor. I think you may need to find how the EFi knows whether its auto or manual, and maybe link a wire to set it right?

cheers,
Ross Kennedy
GLASS

Offline Range Rover Blues

  • Moderator
  • ***
  • Posts: 15218
  • Attack: 100
    Defense: 100
    Attack Member
  • Karma: +3/-0
    • South Yorkshire
  • Referrals: 0
Crazy EFI
« Reply #3 on: May 31, 2007, 17:37:26 »
IF it's a hot wire then there is a switch for Neutral and PArk or a resister for manual.

But, on an F I'd expect to see flapper EFi, plus there would be more than 4 wires to connect and you don't adjust the throttle pot.

So my guess is it's the flapper, not my chosen specialist subject I'm afraid.
Blue,  1988  Range Rover 3.5 EFi with plenty of toys bolted on
Chuggaboom, 1995 Range Rover Classic
1995 Range Rover Classic Vogue LSE with 5 big sticks of Blackpool rock under the bonnet.

 






SimplePortal 2.3.5 © 2008-2012, SimplePortal