Vehicle & Technical > Defender

cold engine cough

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range17:

--- Quote from: JIMBOBLY on December 14, 2011, 20:10:29 ---could be something stupid like the diaphram in the prima pump knackerd,letting the diesel flow back slightly

--- End quote ---
Do you mean lift pump ?if so then i have fitted another one of them  :undecided:

JIMBOBLY:
sorry mate,im bein a bit dense,with workin on loads of other stuff,i meant the prima pump on fuel filter housing,but they dont have them,if you have a "lift pump",lol,sorry :rolleyes:

range17:
Thats ok mate appreciate any ideas at the moment ,alot of people are saying it happens with there 90 and is normal but it never use to happen so cant see its normal ,trying to find out if there is some sort of cold start setting in the pump that might be playing up .

JIMBOBLY:
well another thing to try mate,before you go and spend money,is the tappet gaps,the coughing when cold,could be a compression issue,due to incorrect tappet gaps inlet and outlet valves are both 0.20mm,and should be adjusted cold,give that a try,i got a very cheap 200tdi to put in my rangie,because they thought it was knackerd,because gaps were to tight,worth a bash mate

range17:
Double checked the gaps and were spot on thinking of backing them of just to see if it makes a difference,can't understand why it does it when cold ,if it was air leak or something then it would do it all the time .

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