Diesel ?? common rail or injector pump ,either way firstly i would suspect the head gasket as it sounds like its burnt through between cylinders one and two .This is the most connon fault with any engine
SOURCE: 99 buick Lesabre
hey thanks for bringing me up to speed. ive been working on many other problems but with your great explanation i remember.
we need to check the compression on that cyl. and compare it to the compression on 2 other cylinders your choice.
but before you do this get a can of carb cleaner . and with the car idling spray around the intake manifold in the area of #6 cyl. what we are looking for is a small vacuum leak that would also act like this. with the engine idling and spraying around the intake the engines idle sould not change and if it does when you spray you have an intake leaking.
let me know how it turns out.
later
paul
SOURCE: Have a 1999 Toyota Tacoma with a 3.4. Vehiclw was
Most likely I a would suspect the fuel rail had moisture in it. If you checked emissions it would most likely show no HC and alot of 02 and no CO. If it does show alot of HC then I would suspect sticking valves intermittantly . The pinging really points to no fuel issue tho. If you pull the injector connector off and no change then I would remove the fuel rail and inspect. Also make sure the wires are in the correct locations. It easy to get them wrong.
SOURCE: Cylinder #1 misfire on a Ford Taurus SHO
Did you check the condition of the spark plug? If the plug is good do a compression check; a very low reading could indicate a sticking intake valve (sticking open). The easyest and cheapest way to fix a sticking valve is to introduce 1/2 can of Sea Foam into the air intake manafold; just follow the instructions on the can except you will use 1/2 can instead of 1/3 can. That Yamaha motor from what I have found collects tons of gunk on the valve stems. Good luck.
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