Coil packs, replace one or both?

[timebombprod]

How do I test the cap and wire setup? Am I pressing the starter button with the cap unplugged from the spark and seeing what it reads? Or am I taking it completely off and doing something else?

[Redman]

How do I test the cap and wire setup? Am I pressing the starter button with the cap unplugged from the spark and seeing what it reads? Or am I taking it completely off and doing something else?

Not while trying to run engine.

Twist cap off the wire.
Measure Ohms (resistance). Meter on Ohm scale. Test the meter itself by touching leads together, should read Zero. THen to test the cap, One lead into each end of the cap to make contact. SHould be about 5K (5000). As the cap goes bad it can be 10k or 20k or 50k or 100k then goes completely open infinity and readthe same as if leads are on nothing.
Replacement caps are less than 5 bucks each. Do go bad with miles and heat.
Also look to see if can see the "conductors" at the end of the wire. If suspect, cut end off about 3/8".

Yes, NGK.
THe two inside caps are different part number from the outside two. Only so the inside are longer to reach, and outside shorter so dont have knee against it.

[Burque73]

Am I completely taking off the wire from the coilpack aswell?

If needing replacement, are NGK plug caps reputable and is the wire 7mm thick with the tubing?

This is kind of a PITA so be careful. If you try to pull the wires out of the coil you'll find them glued in with epoxy. If you manage to get the wires out, it's difficult to clean out all the insulation from the wires and leftover glue in the hole, so the new wires will fit. Also, The little spike in the center of the hole is easy to damage if you're not careful. Gluing the new wires in needs to be done with care as not to get any adhesive on that spike too, while still using enough to get a water tight seal.

The wire I used to do this was 7mm from Auto Zone and I used a plastic weld epoxy followed by a high temp RTV to make sure it was sealed well.

[timebombprod]

Okay so, testing two plugs. Multimeter is set on the horseshoe setting at 20k, tested cap 2 and 3 and in getting readings of 11.2 and 11.86, now does that mean 11 thousand? If so I guess I know what it is now.

Testing by putting one feeler in the cap and other feeler on other end of cap, swapped feelers and same reading. Gonna test 1 and 4 and they've never been tooken off.


Okay so 4 is testing at 10 which is still bad but a bit lower, I tried to test one because 1 burns very well, I cant find a resistance on it? Its obviously different from plug 4 so it's some other cap but I cant get a single reading

[roeme]

Okay so, testing two plugs. Multimeter is set on the horseshoe setting at 20k, tested cap 2 and 3 and in getting readings of 11.2 and 11.86, now does that mean 11 thousand? If so I guess I know what it is now.

Testing by putting one feeler in the cap and other feeler on other end of cap, swapped feelers and same reading. Gonna test 1 and 4 and they've never been tooken off.


Okay so 4 is testing at 10 which is still bad but a bit lower, I tried to test one because 1 burns very well, I cant find a resistance on it? Its obviously different from plug 4 so it's some other cap but I cant get a single reading

Yep, your caps are due for replacement. As explained very well by redman, they must either read around 5k or close to zero.

It's "either" because the spark plugs themselves may have an integrated resistor as well - combining them with a resistor in the spark plug cap isn't advisable unless your ignition system is in tip top shape. Hence, you should measure the resistance of your spark plugs too to know what you have.

[fastbysuzuki]

I think the caps are the same as the 850 if so then you need
Ngk plug caps. 2 X XB05F-R NGK PLUG CAP


use 2 each - NGK XB05F and VB05F.