FridgeFreezer Posted March 30, 2014 Share Posted March 30, 2014 The basic check is if the throttle position gauge in megatune looks wildly wrong or doesn't move. If it's nailed around full throttle before you've put your foot near the pedal that's a giveaway. Quote Link to comment Share on other sites More sharing options...
muttleyd Posted March 30, 2014 Share Posted March 30, 2014 As you have alluded make sure your ignition feed is connected to a live that is on both during cranking and ignition on. There are number of different ignition feeds. Its easy to pick the wrong one. I did twice.... Quote Link to comment Share on other sites More sharing options...
bobtail84 Posted April 6, 2014 Share Posted April 6, 2014 well ive double checked that the engine is at top dead center using the trusty poke something in the spark plug hole for no.1. cylinder and see when its at the top of its travel and the sensor is pointing directly at the 5th tooth. Will double check that the valves are opening at the right time when i get the chance but other than them being out anyone got any other suggestions? Have you checked that your not 180deg out yet? Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted April 6, 2014 Share Posted April 6, 2014 As EDIS is wasted spark, it won't matter if it's 180 degrees out. Quote Link to comment Share on other sites More sharing options...
bobtail84 Posted April 8, 2014 Share Posted April 8, 2014 As EDIS is wasted spark, it won't matter if it's 180 degrees out. Are you sure about that????? Quote Link to comment Share on other sites More sharing options...
Cynic-al Posted April 8, 2014 Share Posted April 8, 2014 I tried to get my head around this earlier in the thread and confused myself, however I came to the conclusion it can't matter as there is no 180 degrees out. With a dizzy you have to get it right as the dizzy runs off the cam which is geared 1/2 speed of crank so that you get a piston up/down exhaust valve open/close piston up/down inlet valve open/close and the appropriate plug fires once per 2 piston strokes after the inlet valve has opened/closed. The trigger wheel on with MS is on the crank so the missing tooth which it uses to set timing is always 5 teeth away from TDC regardless of if the engine is just after the inlet or exhaust valve opening/closing on cyl 1. So the MS fires the opposite 2 plugs at the same time to compensate. Right Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 8, 2014 Share Posted April 8, 2014 Never mind all that, it's gone very quiet on the basic checks that have been suggested here. Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted April 8, 2014 Share Posted April 8, 2014 Are you sure about that????? Yes. The trigger wheel on with MS is on the crank so the missing tooth which it uses to set timing is always 5 teeth away from TDC regardless of if the engine is just after the inlet or exhaust valve opening/closing on cyl 1. So the MS fires the opposite 2 plugs at the same time to compensate. Right Bang on. It has gone a bit quiet on here. I'm interested to know how the OP is getting on... Quote Link to comment Share on other sites More sharing options...
Tanuki Posted April 8, 2014 Share Posted April 8, 2014 Have you measured the fuel-pressure *in the fuel-rail*?? You should be looking for at least 3Bar, 4 is better. Does the fuel-rail hold full line-pressure [at least 3Bar, 4 is better] when the fuel-pump's switched off and you've left everything for an hour or so? Quote Link to comment Share on other sites More sharing options...
PeteMck Posted April 15, 2014 Author Share Posted April 15, 2014 ok. sorry about going quiet for a bit, been busy at work and this is the first chance ive had to get back to the landy. So this morning ive calibrated the TPS and closed gives a value of 209 and open is 249 or something in that ball park. lol. Anyway the flood value was set down at 170 something so ive put that up to 250 just to make sure that doesnt kick in and now the engine is catching and coughing but the battery died so its now on charge. so we have made progress. will double tripple check that the trigger wheel is in the right place and try the suggestions at the start of the thread r.e. spark tables etc and see if we can finally get it running....... not holding my breath. :S Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted April 15, 2014 Share Posted April 15, 2014 OK Those 2 x setting tell me your TPS is not working !! Now, with flood clear at 170, both values mean it will NOT fuel Changing the flood clear is not rweally the answer, you need to sort out the TPS I would guess you may have either a dead TPS, or maybe wired wrong, sometimes the "Wonderfull world of Land Rover" don't always get the wires right !!! Remove the TPS, see if the unit can be twisted - there is a little flat blade on the back, see what the gauge does. Check wiring, and maybe try wiring differently ? TPS is a fairly major input unit to MS !! - worth sortingNige Quote Link to comment Share on other sites More sharing options...
PeteMck Posted April 15, 2014 Author Share Posted April 15, 2014 ok. well when i first tried calibrating it said i had a negative difference when setting open and closed values so swapped the outside 2 wires (red and yellow) as figured green is the middle which ever way round you look at it and now it at least gives a change in the right direction. will take it off and have a look, Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 15, 2014 Share Posted April 15, 2014 We may have a winner there - If flood clear is 170 and your TPS is more than 170 all the time it will never squirt any fuel beyond the priming pulse, probably what it was coughing on at first turn. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 15, 2014 Share Posted April 15, 2014 Yup, TPS is toast! Replace or when you pump the pedal it will go into flood clear.... Quote Link to comment Share on other sites More sharing options...
PeteMck Posted April 17, 2014 Author Share Posted April 17, 2014 ok, so replaced the TPS sensor with a brand new one and now get a value of 6/7 for closed and 64 for fully open. engine now turns over and catches and almost starts but not quite (and is now flooded). the middle wire i have as the earth, the red is the +5V which it is receiving and then the yellow for the other one. Tried the red and yellow the other way round and it gives a negative difference (i.e. closed value is higher than open). Is the flood clear value of 170 a direct value compared to the TPS so if the TPS value goes over 170 it stops it or is it more complicated, otherwise it seems i have bought a dodgy sensor or ive wired something wrong with it. :S this is starting to become very frustrating..... lol. Quote Link to comment Share on other sites More sharing options...
PeteMck Posted April 17, 2014 Author Share Posted April 17, 2014 just actually bothered to read the above post properly and obvs the values are wrong. any ideas why? Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 17, 2014 Share Posted April 17, 2014 Did you calibrate it? If you have, then this one seems like it is toast as well, just differently. Quote Link to comment Share on other sites More sharing options...
PeteMck Posted April 17, 2014 Author Share Posted April 17, 2014 yup gives 7 closed and 64 open. Have tried 2 sensors and they both give the same reading and both will reach 250+ if u turn them with a screwdriver. Is there a chance the MSQ isnt interpreting the signal correctly? have tried wiggling (i know its technical) but it doesnt change the value at all so semi ruled out poor connection but cant see what else it can be.... I dont see how i can have 2 faulty sensors that both give identical readings? Quote Link to comment Share on other sites More sharing options...
PeteMck Posted April 17, 2014 Author Share Posted April 17, 2014 dont no if it makes a difference but is a 4.6 GEMS sensor Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 17, 2014 Share Posted April 17, 2014 Should be wired like this: The values, although slightly off, are irrelevant as long as it's no longer in flood clear mode, the TPS only affects accel enrichment, you can live without it pretty happily. Any other sensors got daft values? Quote Link to comment Share on other sites More sharing options...
PeteMck Posted April 17, 2014 Author Share Posted April 17, 2014 which wires go where on that, as the diagram i have shows middle wires as being green and is the earth. :S Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 17, 2014 Share Posted April 17, 2014 Well it's not the same results is it? Have you calibrated it yet? If it then doesn't calibrate properly I am getting pretty sure you have it wired up wrongly. However.... in this state it should allow the engine to start. Take the plugs out, stick them in the oven for 20 minutes and refit while still hot, then fire it up. Quote Link to comment Share on other sites More sharing options...
PeteMck Posted April 17, 2014 Author Share Posted April 17, 2014 the two i have when i put them on and click get value i get 7 for the closed value and 64 for the open regardless of which sensor im using. Yer i think i probably have it wired in wrong. Quote Link to comment Share on other sites More sharing options...
Cynic-al Posted April 17, 2014 Share Posted April 17, 2014 Are they mechanically setup right? If your getting 250+ by turning with a screwdriver is the throttle cable set correctly and is the TPS adjusted correctly? IE as soon as you touch the throttle does the butterfly start to open and if you watch the bar on the tps calibration screen does it start to move as soon as you start to move the pedal? Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 17, 2014 Share Posted April 17, 2014 Either way, plugs out and in the oven, whack em in and start it up, the TPS issues won't stop it from running. Quote Link to comment Share on other sites More sharing options...
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