python Posted June 4, 2013 Share Posted June 4, 2013 hi guys,, im having a problem with a conversion im nearly finshed doing..when i start the 90 its runs very fast..i know i had some intercooler hoses ect mixed up but i beleive they are sorted now.. i slackened off the throttle cable.. slackened the bolt that allows the throttle linkage to goes back to rest further back..when i kill the engine i hear a slight hissing noise so guess i might have an air leak somewhere but cant find it as its stopped by the time i get under the bonnet.. any suggestions, its a defender 90 2,5 na with a defender 2tdi installed..thanks guys..,i was trying to post this in the tech bit but it said i couldnt.. cheers. Quote Link to comment Share on other sites More sharing options...
western Posted June 4, 2013 Share Posted June 4, 2013 you cannot post in the Technical Archive, use the appropriate vehicle forum. Quote Link to comment Share on other sites More sharing options...
python Posted June 4, 2013 Author Share Posted June 4, 2013 thanks. Quote Link to comment Share on other sites More sharing options...
Snagger Posted June 4, 2013 Share Posted June 4, 2013 The hissing could come from a number of sources. I would suggest the most likely are the brake servo vacuum system or, more worryingly, a fault in the engine that is resulting in pressurisation of the coolant (head gasket failure or a crack or erosion of the head or block). Run the engine up to temperature and then let it cool completely. If the header tank is still pressurised when cold (remove the cap), then it's cylinder gasses getting into the coolant system. The idle speed is set by adjusting a stop bolt on the front end of the injection pump against which the throttle arm rests - get someone to move the pedal while you watch the pump, and you will see the throttle arm moving and thus see the idle stop bolt. Quote Link to comment Share on other sites More sharing options...
python Posted June 4, 2013 Author Share Posted June 4, 2013 Thanks for moving this for me. I was using my phone and couldnt do it earlier. I know the engine lay out of a landy for a couple of years. Can I run it without the expansion cap and servo hoses connected? Hope its not a head gasket as I haven't even driven it since I bought it. Thanks guys. Quote Link to comment Share on other sites More sharing options...
python Posted June 4, 2013 Author Share Posted June 4, 2013 I forgot to add I already slakened the stop bolt and throttle cable. Still runs very fast so not really wanting to let it run at such,a high rpm. Quote Link to comment Share on other sites More sharing options...
Snagger Posted June 4, 2013 Share Posted June 4, 2013 It might be that someone tried playing with the fueling screw below the stop solenoid. Quote Link to comment Share on other sites More sharing options...
python Posted June 4, 2013 Author Share Posted June 4, 2013 Hmmmm. Hope not. Might have to look at it myself tomorrow. Quote Link to comment Share on other sites More sharing options...
python Posted June 6, 2013 Author Share Posted June 6, 2013 Does anyone have a pic or diagram of the fueling screw? I can't find any other fault at present as I can only let it run for a few seconds. Quote Link to comment Share on other sites More sharing options...
bluespanner Posted June 6, 2013 Share Posted June 6, 2013 I had one that did this, swapped the injector pump and all was good Quote Link to comment Share on other sites More sharing options...
python Posted June 6, 2013 Author Share Posted June 6, 2013 Hmmm. Was worried about it might come to that. What's involved in swapping one and does anyone know if a disco one will fit my defender engine. Both 200tdi's Quote Link to comment Share on other sites More sharing options...
python Posted June 8, 2013 Author Share Posted June 8, 2013 Can anyone tell me what might happen if I play around with the power screw? I don't have the skill to swap injection pumps. Quote Link to comment Share on other sites More sharing options...
Snagger Posted June 8, 2013 Share Posted June 8, 2013 You can try that screw. Just rotate it a little at a time, no more than 90 degrees, and make a note of its starting orientation and how much you have moved it ach time so that you can set it back to its current position if need be. Quote Link to comment Share on other sites More sharing options...
python Posted June 8, 2013 Author Share Posted June 8, 2013 Yeah. No difference at all. When I bought the engine I was told it had a new belt. Could it be the timing out slightly? Im getting worried im going have to fit a new injection pump as I don't know what else to look at. How easy it to swap a pump over? Never done it before. Quote Link to comment Share on other sites More sharing options...
python Posted June 12, 2013 Author Share Posted June 12, 2013 Had a landy mechanic look over the 90 today. Even he was. Bit stumped. So we decided to start stripping the timing case ect for removing the pump. When we took the belt.tensioner off the fuel pump jumped back a fair bit. Could it just be the pump was under tension from the belt and was jammed open? Quote Link to comment Share on other sites More sharing options...
Snagger Posted June 13, 2013 Share Posted June 13, 2013 The pump sprocket settles in specific rotational positions because of the internal cam plate and plungers' spring pressure. The engine should have been set to TDC with a flywheel and pump locking tool before loosening the belt (the fact the pump "jumped" suggests this wasn't done) - you may well have lost the timing alignment between the camp shaft and crank shaft now. You can use the marks on the sprockets and timing case to realign it all, but for Christ's sake take the injectors or glow plugs out and only use a standard ratchet to turn the crank over with one hand - don't use a long bar as you need to feel any increase in resistance on the crank to stop immediately - it'll be the pistons moving up against the open valves, and forcing it iw bend the push rods and possibly damage the valves, pistons, rockers and shaft, cam followers and slide! Quote Link to comment Share on other sites More sharing options...
python Posted June 13, 2013 Author Share Posted June 13, 2013 I don't know exactly what he done but im not full of confidence in his work. problem is I don't know how to do it myself. I think the timing is set but feeling lost now. Quote Link to comment Share on other sites More sharing options...
python Posted June 26, 2013 Author Share Posted June 26, 2013 Fitted a new injection pump tonight, runs perfectly except for a diesel leak, o_O is there an additive for a fuel leak? Quote Link to comment Share on other sites More sharing options...
Snagger Posted June 27, 2013 Share Posted June 27, 2013 Where's it leaking? I don't think there is such an additive, and I wouldn't recommend it if there was - it'd gum up the injectors, causing the piston damage you can see on someone's 300 thread on the Disco forum. Quote Link to comment Share on other sites More sharing options...
python Posted June 27, 2013 Author Share Posted June 27, 2013 ah ok, its under the throttle linkage spring I think, Quote Link to comment Share on other sites More sharing options...
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