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Old 11-14-2012, 09:17 PM   #1
DavidDFW
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Tune up component question

Ive been reading the big tune up thread the past day, and had a question regarding components. Ive got a 96 5.8 351w, 170k miles, no work of significance ever having been done.

Lot of differing suggestions on components in the threads ive read (including whether to gap the plugs and bump the timing on a 5.8). I just bought the following components:

Ford Racing Wires $43
Autolite 24s ~$8.5
Motorcraft DR374B Distributor Rotor $19
Motorcraft DG470 Ignition Coil $43
Motorcraft DH411B Distributor Cap $47

Then I saw this on Summit's site:

http://www.summitracing.com/parts/cm...50?prefilter=1

Its a tune up "package" for $97.

Question: The summit package is significantly lower in price. Did I waste money or should I see better results with the components I bought?

Since Ive already bought the components listed above, this is really a question for next time. Thanks in advance.
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Old 11-14-2012, 09:25 PM   #2
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I just realized the kit doesnt have an ignition coil. Still more expensive, but close enough I guess it makes sense. sorry about that
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Old 11-14-2012, 09:29 PM   #3
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Stick with what you bought, much better quality than the Summit package.
You made a good choice choosing the MC coil over aftermarket made in China junk, especially MSD. I used the same parts when I did my tune up.
I also did the wider plug gap and timing bump.
The timing bump and plug re-gap may not do much good on a 5.8, maybe more harm than good. SeattleFSB has a few posts on why not to re-gap and bump the timing on a 5.8.

You actually purchased what most guys on here would recommend. I used the MSD cap cuz it has the Brass contacts
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Old 11-14-2012, 09:32 PM   #4
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yeah I read his posts on both plugs and timing - I dont plan to gap or bump as I dont know enough and expect the swap above will make a big enough difference to make me happy while I learn more.
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Old 11-14-2012, 09:40 PM   #5
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A couple of other things you can do is rebuild your injectors and replace all those crap plastic vac lines with silicone rubber ones, clean your throttle body.
That stuff is easy and inexpensive to do and can make a big difference.
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Old 11-14-2012, 10:01 PM   #6
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Quote:
Originally Posted by DavidDFW View Post
yeah I read his posts on both plugs and timing - I dont plan to gap or bump as I dont know enough and expect the swap above will make a big enough difference to make me happy while I learn more.
You definitely want to check the gap of your plugs. As during shipping and packaging or transit. Those plug gaps can change and you'll be wondering what's going on with your truck. Just gap them to what ford says for your truck. Personaly you should of went with motorcraft plugs instead of auto lite.
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Old 11-15-2012, 08:03 AM   #7
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yo DAVID,
Did you get the 9mm wires? if so, consider the Proform Ford Racing Licensed Spark Plug Wire Dividers 302-641 9mm $10.95 Black set of 6

http://www.summitracing.com/parts/pro-302-641

Silicone Brake Caliper Grease and Dielectric Compound
Lube Inside of Distributor Cap Surface; Suppresses voltage leaks by coating inner distributor cap surface. Part Number XG-3-A 3 oz.; or use spec ESE-M1C171-A; Also provides high voltage seal to secondary ignition wires.
http://www.fcsdchemicalsandlubricant...oduct=Silicone Brake Caliper Grease and Dielectric Compound&category=Greases
or = brand at any parts store.
Source: by miesk5 at FSB
Apply small amounts of grease to inside of boots on both spark plug
& distributor cap ends. Silicone dielectric grease will prevent corona & arcing. Be sure you have made a good connection in the distributor cap and coil. recheck these connections periodically. If terminals in distributor cap are gray-green, or appear corroded you may have a poor connection. Poor connections
at either the distributor or spark plug ends will cause arcing.

I guess you have seen sewiv's article @ http://www.fullsizebronco.com/forum/....php?p=1086609
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Old 11-15-2012, 06:09 PM   #8
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I got the dielectric grease - will look into the wire dividers - is there a reason other than an oderly appearance to using them?

Thanks for the other ideas as well... every easy cheap idea is a great idea to me
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Old 11-15-2012, 11:41 PM   #9
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Wire dividers prevent cross fire...Not sure of your firing order but 302s have 7 and 8 together which can lead to issues if the wires are close together or damaged.
I don't see air filter, fuel filter, pcv valve and crankcase breather filter on your list of parts...I know your thread is about ignition components, but I include these parts in a tune up.
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Old 11-16-2012, 07:41 AM   #10
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Quote:
Originally Posted by DavidDFW View Post
I got the dielectric grease - will look into the wire dividers - is there a reason other than an oderly appearance to using them?

Thanks for the other ideas as well... every easy cheap idea is a great idea to me
,,,,

yo DAVID,
As FORBYE advised; dividers herp prevent corr-fire;
Misfiring/Pinging due to Improper Spark Plug Wire Routing for 5.8

See;
94-96 5.0 HO - INCLUDES 5.8 - engine miss, spark knock, buck/jerk, surge and other driveability concerns
Source: by Tank92 (Tank) at http://www.supermotors.net/clubs/sup...y/media/299011

Engine miss, spark knock, buck/jerk, surge and other driveability concerns may be caused by induction crossfire. This occurs because of improperly
routed spark plug wires

If spark plug replacement is performed, the correct firing order and spark plug wire routing is essential to prevent the possibility of induction crossfire
between cylinders. Refer to the following procedures for inspection of the spark plug wire routing and firing order. Properly reroute the spark plug wires
if required.

To eliminate the possibility of the coil wire becoming disconnected, route the coil wire under the spark plug wires at the distributor cap.

Also, I use a short vacuum hose section to slip over spark plug to help thread in & it helps to prevent cross-threading when using socket & ratchet; esp in #4
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Old 11-17-2012, 02:32 PM   #11
DavidDFW
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thanks guys - ive changed the air filter recently but added the additional items you've suggested
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Old 11-17-2012, 03:24 PM   #12
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Check your spark plug gap just before you install each plug. If you drop or bump a spark plug, check it again. Check that your base timing is set at 10 degrees BTC. Then test for any Diagnostic Trouble Codes.

Route your wires as pictured below.


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