I have the bucking jolt issue and have tried all the fixes, I went back to the beginning and re-replaced the autolite plugs that had a variety of gaps from
.028 to .042, I noticed the sticker on the radiator brace and the gap was .052 to .054 per factory specs. it seemed to run better but will do some highway driving in the morning. went back to motorcraft plugs. dr

 

Your gonna get a lot of input on this...

Here is what I suggest.

Get a new set of plugs and gap them 0.005" under what ever the sticker says. Now here is the important part! Don't use the center electrode to lever against. Don't even touch it except for using the feeler guage to check the gap.

Do that and just about any plug you put in there will work fine. The 0.005" under size is to help with gap creep and an aging ignition system. Oh.. and TQ the plugs to 12ft lbs.

Here is what I use year round (including nitrous in the summer)

Rich

 

bausch plat. 4's no need to gap........

 

The only problem with Bosch is that they have been known for bad quality. I run them and they are fine in my truck but I am switching to NGK next time.

 

Don't take advice from a noob..



Bosch silver plugs are awesome.. I've done dyno tested different plugs in different engines and I LOVE the silver plugs. Even on pump they show great consistency on lean mixtures. They have cured a many misfire / ghost-knock problem for me. (I'm not talking about using aftermarket air/fuel management either) You cant go wrong with Bosch.

 

After throwing parts and time I could not find the problem with the bucking/jolt issue. I bought the truck used with 70k on the odo. it kinda shook but i was changing plugs and wires anyways, but I did not gap the autolite plugs since i thought they were pre gapped outta the box. Boy was I wrong!
I bought motorcraft plugs and a gapper tool and stretched the gap to .054, It runs sooooo smooth. took it about 150 miles today from whittier to long beach to So.Central L.A.(the hood), and back. idles great, climbs hills great and I am done D

 

Awesome, glad you fixed it. Just for your reference - I always triple check my plug gaps.

 

Excellent! Makes a feller feel good when it's something simple and cheap.

Rich

 

Rich, you are exactly right. When things go smooth and cheap it makes every thing better.

 

Auto Light Platinum @ .054

 

Previously posted......f.y.i......


When changing spark plugs, always use Motorcraft double platinum's, or fine wire platinum's. They are designed to be
the correct heat range for your 2.3L, 3.0L, or 4.0L engine, as well as Ford's EDIS.

A word of caution about gapping these plugs. On the double platinum's, there are platinum beads on the center electrode, as well as the outer electrode:










Make sure you use the "wire" type of spark plug gauge, NOT the "circular" type of gauge.
When using the "wire" type of gauge, DO NOT use force to insert it in the gap, the platinum
beads can be easily damaged. To adjust the gap, bend the outer electrode close to the
spark plug threads.


Use one of these type of gap gauges:

http://www.sears.com/shc/s/p_10153_12605_00940816000P


http://www.sears.com/shc/s/p_10153_12605_00993925000P


DO NOT use this type of gap gauge:

http://www.sears.com/shc/s/p_10153_12605_00999827000P

 

Okay, just ran across this. My question is, none of those guage you shown have the measurement of 0.052 or 0.054!! How do you guys make the gap with those tools? I am having a problem right now with rough running after changing my plugs (Autolite Double Platinum) and wires (Motorcraft).

 

GTFO.......

With that reasoning Goodyear Wrangler RT/S's are the best tires for your truck.....


GTFO, Just go, get out of here.