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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Topic: d 4 7u injector problem
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44/40tom

10-23-2012 15:15:57
174.27.88.73



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engine misses on #3 usually smooths out after warm up weather is getting colder does not want to smooth out

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fordtractorpro

10-24-2012 21:28:29
71.236.76.193



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Re: d 4 7u injector problem in reply to 44/40tom, 10-23-2012 15:15:57  
I have an injection pump if you need it.

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Old Magnet

10-24-2012 07:36:05
76.254.47.190



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Re: d 4 7u injector problem in reply to 44/40tom, 10-23-2012 15:15:57  
Move the injector to another cylinder and see if the problem follows. Can do the same with the injection pump also. This should confirm whether it is an injection problem or not.

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Fritz Maurer

10-23-2012 18:22:25
216.137.138.146



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Re: d 4 7u injector problem in reply to 44/40tom, 10-23-2012 15:15:57  
1). low compression No. 3 cyl. 2). leaking injector. 3). worn cam lobe, making timing late and /or incomplete injection. Check valve clearance. Sometimes a weak cylinder can be made to fire if the injection timing is advanced in that cylinder. Before messing around like that I would check compression first, the put a dial indicator on the cam to make sure everything is up to snuff.

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HossinMe

10-23-2012 16:58:56
67.142.162.20



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Re: d 4 7u injector problem in reply to 44/40tom, 10-23-2012 15:15:57  
Add a quart of tranny fluid to full tank of fuel. Hoss

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