Glow plugs were replaced last season, as was the fuel pump. Glow plugs test 1.2 ohms across the board. Battery voltage is currently at 12.7 (after an hour of trying to start and testing, battery is new and was charged). Voltage at the glow plugs ranges from 10.4-10.6. Fuel filter replaced last night and have the air filter disconnected for ease of diagnosis. Voltage to plugs stays for approximately 25 seconds upon turning the key. Smokes while trying to start, so it would seem to me there is fuel into the cylinders. What am I missing here? Why won't this thing start?
Jd 330 starting issue
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when you measured the glowplugs, did you remove the wires and ohm out each one?
if not then you should have .33 ohms and any higher than .4 means a bad one.
They should be 1 ohm a piece. when in parallel it will be 1/3 aka .33 ohms.
it will puff smoke for one cylinder but not enough to run the engine if you have 2 bad ones.
10.4 is a bit low for glow plugs, you might have a corroded wire in the circuit or even the relay could be worn.
what temp was it outside when you tried to start it?
do you have a manual fuel shutoff? if not then check the electric solenoid to see if its staying pulled in.
if not then you should have .33 ohms and any higher than .4 means a bad one.
They should be 1 ohm a piece. when in parallel it will be 1/3 aka .33 ohms.
it will puff smoke for one cylinder but not enough to run the engine if you have 2 bad ones.
10.4 is a bit low for glow plugs, you might have a corroded wire in the circuit or even the relay could be worn.
what temp was it outside when you tried to start it?
do you have a manual fuel shutoff? if not then check the electric solenoid to see if its staying pulled in.
Yes, the wires were removed and each was ohmed individually. I forgot to mention I also tried a jumper wire straight from the battery to the glow plug string for 15-30 seconds. Temperature has been 50-65 degrees. Fuel shutoff is manual, which the cable is stretched but I have new cable ordered and have verified the shutoff is all the way open by hand
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I would test the fuel lift pump to be sure its working
ENGINE—330, 332, and 430
Fuel Pump
Minimum Fuel Flow
3TN66UJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 mL (7 oz.)/30 seconds
3TNA72UJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 mL (20 oz.)/30 seconds
Minimum Fuel Pressure
3TN66UJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 kPa (3 psi)
3TNA72UJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 kPa (3 psi)
ENGINE—330, 332, and 430
Fuel Pump
Minimum Fuel Flow
3TN66UJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 mL (7 oz.)/30 seconds
3TNA72UJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 mL (20 oz.)/30 seconds
Minimum Fuel Pressure
3TN66UJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 kPa (3 psi)
3TNA72UJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 kPa (3 psi)
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have you tred to put throttle to about 1/3 and try starting?
Also did you replace fuel filter before the issue or after? it might be your lines have air in them and need to be bled.
Also did you replace fuel filter before the issue or after? it might be your lines have air in them and need to be bled.
I've tried throttle in all positions. The issue was going on this winter, I put space heater by engine and got it to start. As spring and summer came around, space heater won't kick in because ambient temp is too high. I've been working on this issue the last couple weeks when I'm home and yesterday after taking all the glowplug wires off and cleaning and testing ohms it started, ran a bit and wanted to quit. I figured maybe fuel filter was dirty and replaced it, bled the lines, and used the machine to disc for about an hour last night. Went out to start today and its back to the same issues. Fuel lines have also been replaced from the tank to lift pump, lift pump to filter, and filter to injection pump.
Something I just noticed...when trying to start it smokes until it tries to fire. If you keep the starter engaged past that there is no more smoke which makes me believe no more fuel. If my lift pump is producing the volume it is, my pressure is unknown but with that much volume I would assume the pressure to be sufficient, would it be something in the injector pump?
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do you have a hair drier?
aim it at the air inlet while on high and crank it over, if it starts then pull a glow plug out and see if it does get hot when connected to 12 volts. it might be that your 1.2 ohms is too high to make enough heat. they are usually 1 ohm
aim it at the air inlet while on high and crank it over, if it starts then pull a glow plug out and see if it does get hot when connected to 12 volts. it might be that your 1.2 ohms is too high to make enough heat. they are usually 1 ohm
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3,271 Posts
What color smoke? I am thinking low compression or something with the glow plugs. The indirect injection engines really NEED good plugs to start and good voltage to them. Also a chance the injector nozzles are bad and not atomizing the fuel enough. Instead of a mist it is a spray so it is harder to ignite.
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