Diesel cutting out?

[awcurl]

I've got and 1980 Caddy with a 1.6 diesel, I recently replaced all injectors with new and had the IP timed and lifter springs adjusted.  Now when the truck hits 42 mph the engine starts cutting out. If I give it any more or less throttle it runs smoothly.  Any ideas what I can check?

[LeeG]

air in fuel lines or loose connector on fuel solenoid ?  maybe 42 gives the magic vibration frequecy that shakes something loose a bit and causes a leak or short.

[jtanguay]

theres probably some air bubbles leaking in when the extra demand for fuel comes in.  Definitely have to trace that.  I'd say pop your hood.. start motor.. rev it a good couple of times and check for bubbles on the lines.  If you see lots of bubbles.. you need to get rid of them.  How old is the fuel filter?

[awcurl]

Problem solved.  It turned out to be a small leak on an injector line at the pump.  It would only leak at a certain rpm. I tightened it up and no more problems.

Thanks everyone! :lol: