Got an 85 f350 6.9 diesel I went to start it this morning it cranked slow didnt start so went to crank again it wont glow plug or crank from key.What could be my problem???
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Have a load test done on the batter to check for failing cells. For diesels to start any thing less than a fully charged battery good battery is a waste of time as the engine needs fast RPM to heat the air to ignite the fuel and slow rpm's just doesn't cut it.
Have a load test done on the battery as the glo-plugs should get very hot very quickly. Diesel engines have to have a high rpm crank speed or they will not start and will leave unburnt fuel in the cylinders ( wet glo- plugs). Every indication is that the battery is flat or is not the right capacity for the car.
Yes ! it is possible that if the GLOW plugs are bad there will not be enough temperature generated within the cylinder. Hence it might not crank easily to start.
Secondly if the COMPRESSION is LOW then the fuel will not be ignited easily unless there is enough heat within the cyclinder.
So check the connections to the glow plugs , it must be tight and good to allow good flow of current.
Quick check is to take a fairly thick cable from the positive terminal of the battery and touch it onto the glow plug connector , it should give a healthy spark as it makes the connection , no spark no glow plug
Did you check to see if there is power to the glow plugs if not then that may be the problem and if there is power when you cycle the key not to start but for the plugs to warm up you may have a bad glow plugs.
Bad glow plugs and/or glow plug controller. Common issue with these vehciles. Some also have harness failures. Replace all glow plugs as a set not individually.
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