IP timing??
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Elder User
Joined: Mar 2006
Posts: 901
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From: North-Eastern, Ohio
IP timing??
The '85 has some hesitation, "missing", at cold/hot highway speeds.
I heard somewhere that you can loosen the 3 nuts and turn the whole IP alittle while the engine is running and you can fine tune it.
Did I hear correctly and if I'm right, how much do I turn it?
Thanks
I heard somewhere that you can loosen the 3 nuts and turn the whole IP alittle while the engine is running and you can fine tune it.
Did I hear correctly and if I'm right, how much do I turn it?
Thanks
Posting Guru
Joined: Oct 2005
Posts: 1,030
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From: Powell River B.C.
How may miles are on your IP and/ or injectors. A missing would be more likely a sticky injector- are you using a fuel lubricant-the new LSD does not have enough lube for the mechanical injector systems on our trucks. Are your return lines and caps on the injectors in good shape? Make sure these things are good before you mess with the timing.
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Elder User
Joined: Mar 2006
Posts: 901
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From: North-Eastern, Ohio
The truck has 100,186 miles. New fuel filter, oil and filter change, return line kit. I use Diesel kleen at each fill up.
There is bluish smoke that goes along with the hesitation, the worse the missing, the darker blue smoke. If that helps any.
There is bluish smoke that goes along with the hesitation, the worse the missing, the darker blue smoke. If that helps any.
Posting Guru
Joined: Oct 2005
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From: Powell River B.C.
I would check that all of the glow plugs are good, a couple of bad ones would allow an occational miss fire until well warmed up. The timing marks at the 12 oclock postion of the IP and gear cover should be nearly lined up. If the IP is turned towards the passanger side, you are advanceing the timing, retarding towards the driver side. With the cold advance on the truck should clatter noticeably when accelerating, then when the cold advance cuts off, the rattle on acceleration should be gone. This is with a properly funtioning IP, with all the internal advance parts doing what they are supose to. Usually a 1/2 line advanced on the scribe line is pretty close to properly timed.
Posting Guru
Joined: Aug 2006
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From: Kent WA
Originally Posted by F250FarmBoy
The '85 has some hesitation, "missing", at cold/hot highway speeds.
I heard somewhere that you can loosen the 3 nuts and turn the whole IP alittle while the engine is running and you can fine tune it.
Did I hear correctly and if I'm right, how much do I turn it?
Thanks
I heard somewhere that you can loosen the 3 nuts and turn the whole IP alittle while the engine is running and you can fine tune it.
Did I hear correctly and if I'm right, how much do I turn it?
Thanks
Senior User
Joined: Mar 2007
Posts: 201
Likes: 0
Moving that pump about .030" will change your timing about 10/12 degrees, just be sure to advance it. You will notice a difference in sound with that much movement -sounds much like a cold start with the sharper clatter. It is fun to play with, especially if you can get your hands on a llumi probe. More movement that that will cause you starting and other troubles...
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Elder User
Joined: Mar 2006
Posts: 901
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From: North-Eastern, Ohio
New glowplugs and relay.
No matter if its warmed up or not, it'll hesitate under accelleration while at highway (55+) speeds, but if its warm, it doesn't while at idle.
No matter if its warmed up or not, it'll hesitate under accelleration while at highway (55+) speeds, but if its warm, it doesn't while at idle.
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