chimpboy wrote:Never stalls, and nor should yours. If you fix things by cranking the idle up that high then you'll just be masking the real problem.
robbie wrote:I agree, bandaid fixes dont solve the problem.. they just make them worse over time..
sounds to me like its a carby problem..
bogged wrote:if its a cracked head or something serious, patching it will cost you $1000's in the end.
See, the point of all this is that you need to diagnose this shit methodically or you are going to waste
time (yours and other people's) and
money (yours most likely) dicking around with it.
Unfortunately it's not impossible that you have a fairly serious problem as you may have gulped in some water or cracked something due to heat - getting it as hot as you did shouldn't wreck a sturdy motor like this, but getting that hot then dousing the thing in cool mud could.
If Robbie's right and it's a carby problem then I can't personally advise you on the diagnostic process as I am only really familiar with EFI.
Leaving that aside, I still think that your problem could be electrical. I suggest checking what kind of spark you've got - pull the coil lead out of the distributor and position it so that the electrode at the end is about 10mm from a grounded metal part such as the engine itself. Then turn the motor over and watch what kind of spark you get. Is it fat and blue? Then your coil is probably okay. Is it weak and yellow? We may have a coil or coil lead problem.
If the coil looked okay, move onto the spark at each cylinder. This is basically the same test but you disconnect each spark plug lead at the plug end instead (and of course you have the coil connected to the distributor again.) Fat blue sparks or weak yellow sparks?
Even if all that looks good you still have to check the plugs themselves unless you and Bitsamissin already did all that.
If you get to the end of all that then you can probably eliminate spark as your problem.
So then what? Well, since you're now familiar with the process of pulling out all the spark plugs you should probably take a deep breath and do a compression test. If that checks out then to Bogged's great disappointment you can probably conclude that the engine is okay internally.
That leaves the carby and someone else is going to have to advise you there - I will read with interest.
Was this a long post? Yes. But I really encourage you to be very methodical about this. Even mechanics who should know better are sometimes prone to just swapping in the part they think is most likely to be stuffed and to continue that process until they've blown a massive wad of cash. It really irritates me because if you just take your time and think and check each thing in sequence you can usually diagnose the problem and fix only the one thing that's stuffed.
Good luck, and don't wait another 1200km before you replace that ridiculous air intake. I swear I assumed you had taken the cover off before you took the photo, and that's why I didn't suggest the carby as a possible issue. Playing in mud with that on top of the engine seems... unwise.
Jason
This is not legal advice.
