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Re: 87 Dodge "Southeast of Disorder"
draggnastro #500023 September 26th 2011 11:01 pm
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If it was set correctly before you pulled the head and you haven't moved the distributor, then it should still be fine. However, how sure are you that it was set right before?


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Re: 87 Dodge "Southeast of Disorder"
draggnastro #500026 September 26th 2011 11:06 pm
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thats true, no i didnt move it, but i did have an occasional problem where it would diesel after i shut it off if i had run it for awhile. May be worth checking before i head out on the road with it. Just got to change the oil and retighten the alternator bracket and i should be good to go.


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Re: 87 Dodge "Southeast of Disorder"
draggnastro #500042 September 27th 2011 1:47 am
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Your base timing should 16 BTDC at 725 RPM idle in neutral with the parking brake on and the engine fully warmed up. SCC ("Spark Control Computer") is another name for the lean burn system. You will need to find the wire that went to your old carb and ground it for the timing test. The computer needs to see that it is grounded for the timing to be set right.

Also, be sure that (a) the vacuum pod on the computer still holds a vacuum and (b) the outer ring of the vibration dampener has not slipped giving you an incorrect timing reading. You can check for vibration dampener slip with a piston stop tool and some white out. I can tell you how if you are interested. The outer ring on the dampener in my brother's 83 van slipped giving a timing reading that was 8 degrees retarded! It really made a difference when I fixed that.

Be sure the vacuum hose to the distributor is plugged into a source of MANIFOLD vacuum- that is, it has full vacuum at idle. It does not plug into a port on the carb that only gets vacuum when the throttle is opened. it is backwards from a standard distributor.

[Linked Image]

[Linked Image]

If you are going to be using the lean burn computer to control your timing, you will need to leave all the sensors in the engine and hooked up. You might have some sensors that don't have a place to mount in the 170 head, mainly the coolant temp sensor for the computer. The CTS is a key component for timing control. You need to figure out a way to get that sensor installed and working. Possibly the top tank in the radiator or the upper radiator hose. However, keep in mind it is supposed to be seeing the coolant temp on the engine side of the thermostat, so if it is installed on the radiator side of the thermostat it will take longer for the sensor to tell the computer that the engine is warmed up.

[Linked Image]

Last edited by Reed; September 27th 2011 2:05 am.

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Re: 87 Dodge "Southeast of Disorder"
draggnastro #500108 September 27th 2011 9:19 am
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I'll check all that out today Reed. I dont have a timing light, so once i get it fired and running I'll see how she feels and if need be i can borrow a light from someone. Ill check the vacuum line to the dist and all the others. Were you able to find a spare vacuum tree?


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Re: 87 Dodge "Southeast of Disorder"
draggnastro #500134 September 27th 2011 11:13 am
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Crap, sorry, I need to go dig through my spare parts bolt buckets. I am pretty sure I have one, I just need to find it.

You need to get a timing light, a hand held tachometer, and a vacuum gauge at a minimum. All of those can be bought cheaply on Craigslist.

TIMING GUN

MORE TIMING LIGHTS

Tachometers

Tach and timing light

Vacuum gauges are cheap and can be purchased at most parts stores. It is a good idea to install one permanently in the van to monitor engine condition. Plus, driving to maximize engine vacuum is a great way to improve fuel economy.


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Re: 87 Dodge "Southeast of Disorder"
draggnastro #500148 September 27th 2011 12:01 pm
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Just checked- no power brake vacuum trees in my garage. You might be able to scrounge one off of a v-8 or build one using plumbing fittings from the local home improvement store. Just be sure that you get the right threads.


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Re: 87 Dodge "Southeast of Disorder"
draggnastro #500178 September 27th 2011 2:24 pm
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no worries, ill figure it out. I got it all buttoned up and fired up today. One slight problem. The carb i got is missing the bolt that acts as a lever for the accelerator pump linkage, as well as the seal for where the rod goes through the top of the carb for the accel pump. Maybe a pic would be easier to explain.


2003 Grand Caravan

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Re: 87 Dodge "Southeast of Disorder"
draggnastro #500181 September 27th 2011 2:38 pm
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old hand
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I have used zip ties before to fasten linkage lol

Re: 87 Dodge "Southeast of Disorder"
draggnastro #500182 September 27th 2011 2:38 pm
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Ok, heres the location of the screw for the accel pump.

[Linked Image]

and the missing o-ring/bushing/whatever goes there

[Linked Image]


2003 Grand Caravan

Member Vanatics Van Club-Spfld, IL
Member Florida Van Council
Member Central Florida Vans,-Orlando, FL

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