whts the best wat to
#1
05-27-2009, 12:49 PM
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whts the best wat to
I have an intermintent skip in my 1994 e-350 460 engine I have new plugs , plug wires new dist and rotor buton Im thinkinging now it might be a sticking vlv as I have tested all the other components such as egr vlv etc, Wht is the best way to treat the engine to try to loosen the vlv. This is in a motor home and it sits more than its run..help will be apprec. tks terry PS I tested the fuel press. it is 40lbs and holds for 20 mins after I turn the engine off. the fuel flow is fine the timing is dead on the money
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05-27-2009, 04:59 PM
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05-27-2009, 05:18 PM
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05-27-2009, 06:03 PM
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When is it occurring? under load, cold, hot, at slow cruise, open road speed or only at idle? i would be checking all of the basics first before digging too much deeper. comp test, plug firing voltages on a scope, have a very close look for intermittent tracking. is the ecm throwing out any fault codes? i've seen all sorts including a dried rat intermittently shorting a O2 sensor... it could even be a sticking injector...