Vehicle & Technical > Discovery

Fiddlin' with the fuel injector thing on a 200tdi

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Guardian.:
dont go to much with it, and it sounds like you have!
soon need new bits!
like a fuel pump at least, or an engine.
i got one of ours to go like a rocket for 1 1/2 days!!!!!!!!!!!!!!!!

Budgie:
Unless you've got an uprated intercooler then you only want to rotate the diaphram about 90 degrees clockwise. Any more and you're just thowing unburnt fuel out of the exhaust as there isn't enough oxygen in the air to burn the rest.  :wink:
I would tend to leave the smoke screw and star wheel alone as that's when it starts getting messy.

Eeyore:
Close description as to what happens but not quite.  :wink:

Without disassembly, all you're doing is altering the fuel pump timing, not the actual quantity of fuel entering the cylinder. Too late with the timing and you're pushing cold combusted fuel into the exhaust and making lots o' smoke and loosing power. Too early and your retarding the motion of the piston and risking diesel knock (which leads to a very hasty failure of the piston).

There is a tolerance on the timing set at Solihull and this is why adjusting the pump has more effect on some engines than others. Just moving the timing a set amount will give a very variable result dependent on how the timing was originally set.  :wink: If that makes any sense!

Cheers
 8)
Eeyore

Budgie:
I always though that the injector pump timing was adjusted at the front pulley, the one the timing belt goes round?  :?

The expaination of altering the diaphram from the Dodge Ram site:
--- Quote ---The eccentric tapered pin that's attached to the diaphram is the FUEL DELIVERY RATE pin. Now from above, looking down at the pump, almost to the bottom of the bore that the delivery rate pin came out of, is the bore that the trigger or action pin rides in. The linear axis or centerline of the action pin is parallel to the axis of the pump drive shaft, or the engine crank shaft. The movement of the delivery rate pin (down with increasing boost levels) allows the action pin (which by internal spring pressure is contacting it) to contact the increasingly smaller diameter. This allows the action pin to move rearward, which increases the fuel delivery rate.
--- End quote ---

extreme90:

--- Quote from: "ben_haynes" ---Be careful have seen a few Knackered 200's after people who dont know what they are doing properly FIDDLE with thinks like this yes ajust it slightly but dont go OTT
--- End quote ---


dont worry, i warned him  :wink:
dont forget there some of us running with stupidly tweaked tdi's on here , aslong as your sensible and not stupid you have no problems, o unless your names mike  :twisted:
 :wink:
dan

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