Vehicle & Technical > Range Rover

Back-firing 3.9

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TwoSheds:
As well as wear in the distributor causing this sort of problem, wear in the timing chain is also a possibility. When you are fitting the new dizzy and you get the timing light on it, note how much the timing is 'bouncing about'.
With mine - still on the original dizzy and timing chain, the spark would occur anywhere within a 15o range!  :-o

Rather than replace the distributor I went for Megajolt and - result! Rock solid timing and the engine runs as smooth as a smooth thing (well - a smooth thing that's 19 years old anyway) so I guess my timing chain isn't too bad - but I have seen horror stories about the condition of the original equipment - the RPI site has some good info at: http://www.v8engines.com/engine-4.htm#timing
Worth bearing in mind, but - don't let it give you nightmares ;)

Roger

Range Rover Blues:
I'd love to know lots more about your megajolt conversion mate as I'm thinking of doing the same.

TwoSheds:

--- Quote from: Range Rover Blues on February 15, 2009, 22:29:57 ---I'd love to know lots more about your megajolt conversion mate as I'm thinking of doing the same.

--- End quote ---
If you do go Megajolt, you won't regret it! Smooth, perfect timing, great sparks, custom LPG curve and WATERPROOF!  :dance: :dance: :dance:

Your 'Click here for Spec' doesn't seem to work - do you run LPG? If not then MegaSquirt would probably be the way to go, but for me Megajolt is perfect.

When I have a bit more time I will put together a post on my conversion - but in the mean time, if you have any specific Q's or would like to pop up and see it, then drop me a PM (I would offer to come and meet, but it's not MoT'd, taxed or insured at the mo :( )

Rog

Range Rover Blues:
Looks like the admin team finally got rid of the remains of the old site, so my spec and galeries are gone.

I might take you up on that at a later date, I havn't time for any projects right now that aren't part of my course :( but I've heard of megasquirt and megajolt before through classic Ford connections.  I wonder if a megasquirt could be coupled to my multipoint LPG system :-k

Just give me an idea, how did you attach the timing wheel? how much did it cost? how did you set it up?

TwoSheds:

--- Quote from: Range Rover Blues on February 17, 2009, 15:02:28 ---Just give me an idea, how did you attach the timing wheel? how much did it cost? how did you set it up?

--- End quote ---
Timing wheel is a Ford Transit - £15 new - and is simply clamped (using the thrower) on the back of the bottom pulley. There IS room ;)
Cost all together inc kit, EDIS ECU, TW, coilpacks and leads - probably £150 ish.
I just copied a known-good map, smoothed it and then set-up a 2nd map for LPG based on the petrol map with what I have read on the internet stuck on top.
Apparently MS can do multi-point LPG injection although I have not seen any details.

I will post pics of trigger wheel etc soon... promise!

HTH

Roger
p.s What course are you doing?

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