My question relates to testing the well worn coil packs which contained a lot of corded stuff in the wells...and the metal inside looked dirty to the point you could not see it in some places....and the resistance in Ohms reading obtained...anyone know of the way it is done? He tried putting one end of his meter to the electric contact and the other end in the adjacent well of sparks...but no reading was obtained that way...then he put positive on positive and negative on negative....and got around .35....stated it was Primary Resistance.

Also...in Land Rover Discovery Workshop Manual (Rave CD) how does one find the test associated with code 1316...?

Thanks!

 

If you think it's bad then just get known good one from one of the parts guys and swap it in. Thats the easiest way to test it.

Dirt doesnt really mattaer that much on a coil pack. Any coil pack that has been on my truck has been packed with sand, mud, poo water etc and they all have still worked fine. I did swap in a known good one when I was having misfire issues and sure enough it wasnt the coil.

Best of luck figuring it out.

 

Well the best Rover mechanic I know of around here...(he is some distance from me) swapped a coil pack last time Rover was in the shop...in April...to track a problem which turned out to be a broken reluctor tooth...which was welded in situ. Problem now is unrelated as the symptomology is much different. The fact that he swapped a coil pack means that they know problems do happen in coil packs...

My question is how does one measure resistance correctly to diagnose? And...and does the resistance grow greater as they age (ohm reading becomes less)...with time and all...my guess is that they do and will fire but at less than optimal...which works the system harder....

 

I get it - that's why I am telling you do just do the same thing he did because it's a waste of time to measure resistance to diagnose a problem. If you think it's the source of the issue replace it with a known good part. If you think it looks bad replace it with one you think looks good. It's not rocket surgery

 

What did you have before p1313 and p1314? He's not a good mechanic if he didnt check reluctor tabs before swapping a coil in. Have you looked to see if the CKPS was damaged when the reluctor tab got broken off?

 

He's a competent Land Rover specialist...

Neither of those codes mentioned came up...

I replaced TPS and cleaned IAC...TPS was all chewed up...because of all the misfire issues I think the coil packs got extra hard wear....vehicle has high mileage...mostly unknown mileage as the odo was not working when i bought it...Mechanic found a bad relay which was the casue of the odo not reading...and i had spent $500 on diagnosis at tranny shop with no fix...they installed VSS...

When i bought the truck had CKPS replaced as that was code was coming up...

I guess I will buy a coil pack....if that is the only way to test em...

 

Why would the coil pack get extra wear because of misfires?

With all these unknown high milage I would do what I told you to do in the first place - vacuum test.. Unfortunately sounds like you may have sticking valve issues. However this will tell you if you have a vacuum leak. Also check your intake bolts to make sure they are all tight. Then you have covered the AIR portion of it. (pending your maf is working)

If that isnt the issue I'd move onto fuel.. Fuel injectors specifically as long as you have good fuel pressure.

Usually when a coil pack fails it will cause misfires on one bank A and one bank B cylinder.

I didnt see if you have done plugs, wires, clean maf etc? AKA a tune up

 

BINGO! I would look first at the CPS. This happened when my car lots its reluctor ring.

 

How do do you do a vaccuum test....do you use smoke....pipe smoke ok?

I looked for cracks in the main hose going into the plenum and nothing..and looked for cracked or unplugged hoses and nothing...there are not too many vacuum lines..I heard some people spray something like carb cleaner on the outside and listen to the motor if it increases/ surges....

I ordered the coil pack...so will try that..got a good deal on it...and is in A condition...mine was in D condition...

Will put on new Champions and the coil pack comes with some high temp 7mm wires that look in good condition....A....I know they aren't the 8mm Magnecors...maybe will get those for Christmas...


Fuel pressure regulator might need changed? I took my vise grips and clamped the return line and there was no increase in the sound of the motor....also took off the vacuum line to the FPR and no increase...though did not check the fuel pressure yet as no instrument for that right now...will prob buy one..

 

FWIW I recommend Kingsbourne wires - Kingsborne Ignition Spark Plug Wires Sets made in the USA - High quality and affordable

Look at your Maf - is it dirty?