engine hesitating at 3000rpm

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200sx-v8

New Member
I'm having some troble with my engine at 3000 rpm. It hesitates, and it seems as it cuts on some cylinders or something. It's only under light load cruising I get this problem.

The afr looks very good, and there is not anything starnge with the timing at this rpm.

Any ideas?
 
Sounds like it could be a dud plug lead or water down the spark plug tube (if you have washed your engine lately. Pull the leads out and check there resistance, the should be between 1 and 7k ohms (short ones closer to 1 and longer ones closer to 7) but if you have a bad one it will most often be open circuit.
May be worth fitting new plugs while its all apart most common way to damage a lead is while changing plug.
 


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