EDC Fuel Pump Tweak

Guys, can anyone point me in the direction of a guide to tweaking an EDC fuel pump :monitor_punch:

mark george said:

Guys, can anyone point me in the direction of a guide to tweaking an EDC fuel pump :monitor_punch:

Click to expand...

If you are thinking of doing something similar to the manual pump - there is no such mod. Fuelling changes on EDC cars is done by changing the ECU chip.

Can't be done all you will do is **** the pump.

The pump is controlled by the EDC ECU.

You have few choices on what you can do for more power.

Start with blanking of the EGR valve

Remove the catalytic converter.

Clean out the inlet manifold and intercooler. It will change it a lot

Or get it chipped but its expensive
Land Rover Defender Discovery 2.5 TDI chip 154HP 363NM 300Tdi Range Rover | eBay it still needs a good auto electrician to fit it though

Or do a risitor mod.

Have a look here
http://www.landyzone.co.uk/lz/f8/tuning-chip-300tdi-edc-discovery-189249.html
And

there is a mod and it won't feck the pump, do a search and yiu will find it.

hifly,

i know there is a tweak i can do but i have searched so much i feel like Indiana Jones!! hence the reason for the initial guidance request

Just incase anyone else needs some help i found this (on another website!!)

I had very similar problems with an old 300Tdi Auto I had. Advancing the timing ever-so slightly was a tip given to me by Jeremy Fearn and was something that worked for me having already tried much of what you've already carried out. Apparently lazy starting is a very common fault on 300Tdi Auto Discos.

Remove the small circular plate that you see on the front of timing case secured with three 10mm bolts.

With the cover and paper gasket removed, slacken the three 10mm bolts you’ll now see on the circular plate inside the timing case.

Turn the large nut in the centre of the plate CLOCKWISE approx 5mm to advance the timing ever-so slightly.

Retighten the three bolts on the circular plate and go for a test drive before replacing the inspection cover.

After a short distance my ‘Check Engine’ warning light came on and the engine went into limp-home mode.

Jeremy Fearn had pre-warned me that if this happened, I’d been a little too generous with my 5mm. If this happens to you, loosen the three bolts and back off the large nut a fraction, tighten everything up and try it again.

Another trait mine displayed simialr to yours were the lazy battery symptoms. After fitting two batteries, the fault turned out to be an intermitent starter motor fault.

With lazy starting and a dodgy starter, the two problems compounded each other.[/COLOR

Now........ my problem is, when i checked mine it was fully advanced as far as it would go!.........so, backed it off about 5mm, wouldnt start, advanced it back about 3mm seems to start ok, just have to see how well it cold starts now in the morning. still clouds of blue smoke when i take my foot off the throttle, and even more when i first start. Lets just hope the dodgy starting is better when cold, always sounds like the timing is miles out.........but its not!

Hope this helps

Oh by the way this bit applied to mine as i have air con;




Posted 08 March 2008 - 05:03 PM

I presume the timing cover is replaced with the aircon idler on aircon models?

I removed the aircon idler, slackened the three 10mm bolts and turned the 22mm nut clockwise about 5mm, replaced the aircon idler then went for a drive.

Start up was encouraging as it rev'd itself a bit on start up which it never normally does.

Taking it out for a drive, it was fine whilst booting it and was fine most of the time, but if I idled for a while (ie at lights) then set off, the CEL came on and it wouldn't let me rev past 2500rpm - dropping the revs back to about 1500rpm knocked off the cel and I could then rev again.

So I came back and turned the nut anti-clockwise about 2mm. The CEL no longer comes on but it also didn't seem to rev on startup like before.

You haven't tweaked the pump - all you have done is fine tuned the timing

Daz

ahhh, so where do i go from here? bad starting, plumes of smoke at start up, plumes of smoke (much worse when cold) when i take my foot off the throttle...... thought this was the tweak everyone raves about....... is there another then Daz?

You use different sized drill bits to advance the pump 9mm/8.5mm/8mm/7.5mm etc.... until you get the diesel knock - then you move back a drill size - your pump will be fine tuned to your engine.

The EDC pump power tweak is done by re-chipping the ecu or by using the resistor mod

Daz

oh right! its not power i'm after just better starting and a cure for the pumes of smoke!!, seemed to start a touch better this morning, but the blue/white smoke! is terrible!!

It always smells as if the engine is burning..... like the radiator has run dry and its overheated but everything checkes out fine.....

coluld the smoke be overfueling when i drop of the throttle? what controlls this?

No blue white smoke is you are burning oil. If it dose it constant then.

Look at the crank case filter and brether

Turbo may be leaking.

No not constant, just at start up and when dropping off the throttle when cold...... In fact it weems to be even when dropping off the throttle when warm since I retarded the pump a touch! Should I put the pump back? It is starting better now! Why would the pump be fully advanced (clockwise with the 22mm bolt) till it stops?

mark george said:

hifly,

i know there is a tweak i can do but i have searched so much i feel like Indiana Jones!! hence the reason for the initial guidance request

Click to expand...

a search for "EDC" found this thread on the 1st page of results.

http://www.landyzone.co.uk/lz/f8/tuning-chip-300tdi-edc-discovery-189249-3.html

you have to look a bit further than the title of threads if you are looking for anything.

Well..... things took a new twist today! started up, smoking as usual drove about 100 yards, it suddently jumped on to full throttle all by itself, and shot up the road with a trail of smoke that looked like it was burning pure engine oil!! Dropped it into N and quickly turned off the engine, the smoke lingered for ages!!!! Started back up and it was ok (apart from the usual level of smoke), but the throttle was very 'jumpy'. Not going to use it again....... its a death trap! think its going to the scrapyard in the sky, i have no idea whats wrong with it, all i know is i cannot trust it!

..........Mark

gazdav said:

No blue white smoke is you are burning oil. If it dose it constant then.

Look at the crank case filter and brether

Turbo may be leaking.

Click to expand...

+1.

how many miles on the clock?

50k on the clock but its a jap import and had clocks replaced along with an engine before i had it 2 years ago.........