Vehicle & Technical > Range Rover

VACUUM ADVANCE OR BACK BOX ??

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barriesheene:
Ok peep's this should be an easyone for you all  :? I have recently done a full service on my rangie (3.9 v 8) all oil's, dissy cap ,rotor arm, plugs, leads etc, but since ,I seem to have lost some power  :roll:  It seem's to run ok but just not as spritely as it was before the service. I've checked plug gaps etc but all seem's ok. I've narrowed it down to two possible thing's
1) While changing dissy cap I noticed that the vacuum advance on the dizzy was loose and shooting forward on exceleration ( was this right to move ) so tightened it up where it looked as though it should be  :lol:  
2 I've cut the back box off to give it that authentic v8 burble  :twisted:
Any idea's guy's
Baz

Range Rover Blues:
Yes, I had the same.

Cheap tatty dizzy cap, it was running on about 5 cylinders when under heavy throttle, the richer mix is harder to ignite so it only showed up then.

Rossko:
If the vac unit was hanging off and you've moved or re-fixed it, it WILL have changed the timing.   It might be back where it's supposed to be .. or it might not.  You need to check the basic timing.

barriesheene:
Thanks Rossko  :D  I take it then that the vacuum advance isnt supposed to move, But I could have fixed it back slightly out  :roll:  I've also noticed that when starting after a spin or two just as the engine catches to start there is a popping sound like a backfire just as it start's  :?:  Strong smell of petrol coming from exhaust to  :oops:

Range Rover Blues:
Hmmm, unburnt fuel and backfiring.  Could well be timing, over edvanced makes starting harder.

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