So the other day on the way home i started getting a pretty nasty misfire. Drove over to my buddy's shop and hooked up his modis scan tool. Read a misfire on cylinder #4 under load. So i went home and pulled the #4 and #1 COP and switched them. And re scanned it. Now reading the misfire on cylinder #1. It appears that coolant leaked down on to the COP causing it to fail.



So remembering that everyone on here used to swear by the global coils on ebay i jumped on and bought myself 10 of them. Only after i bought them did i stumble across a few threads saying how the quality of their parts has gone down. Did i make a mistake buying these coils? Also will adding another hose clamp onto the leaky coolant line fix my problem?

 

Well, If you have bought them might as well go ahead and use them. I would replace the whole coolant line myself.

 

Actually you can get Visteon/Motorcraft coils now, - at a great price. Visteons have "0" bad reports.

Engine forum has plenty of recent info.

 

I had looked at some of the other treads before posting. I guess what i really want to know is, are they global coils really so bad now that i should return then asap and just buy a single motocraft one to replace the cop that failed? will it be ok to use without running a significant risk of damaging the pcm? is it important that i change all 8? I believe i read 130k is about the time to change them and im at 128k.

 

Oh you had purchased already ? No, I wouldn't return them. I've never had a problem with those yet.

Change them all out for ignition integrity. Save your old ones, just in case. Toss the bad one.

I've seen a fresh set of coils make a significant difference. But, I should also mention, - I changed the injectors in that vehicle at the same time. The truck went from feeling like a heavy slug to feeling lighter and more responsive.

How they run is more of a combination of things.

 

Ok cool! I actually bought the set of 10 so i would have 2 extra to keep in my truck just in case. I plan on bench testing them before i put them in. I believe i saw one of your articles actually. Ill reference back to it but if i remember correctly it could not bench test under load but im not sure like i said ill have to look again.

I also was looking at some re manufactured injectors. Rebuilt cleaned inspected and tested. My injectors make so much damn noise. I don't know if its normal or not.

 

I would use them to. Make sure you fix the coolant leak and all..

 

Yea, fix that coolant line. Those usually only leak at pressure burst. Makes it hard to determine that it's leaking.

I think you can get one piece HC lines @ Rock Auto now. I had to go with a 2 piece, = HC connect was purchased separate and added to the line.

Dealership one piece lines are the best for replacement, -but damn expensive. -Those lines are. I've heard they come w/the embedded brass reducer now. Yea, there's more to those lines than you think. Various shape/thickness transitions for reinforcement and so on. That brass reducer protects the heater core from pressure burst as well.

 

Yea, I purchased the 10 pack last time as well. No, you can't bench test them without a Rotunda kit. The only thing I did at the bench is pulled the boots and crimped some of the springs tight on the coil blades (the ones that were loose.)

I also used the 8 that were closest in resistance with one another, - should be 508, but it can vary and doesn't mean they are bad. Unless you get nothing at all of course. That's a DOA.

You can also prep for install. Grease the entire inside of the boot, slide the spring thru, then hit the spring end (plug contact point) w/lacquer thinner.

If your changing plugs, use a thin coat of grease on just the porcelain before install. That makes for a perfect install when mounting the coil boots which should be twisted down (side to side).

 

Yes, that's normal. The skinny Bosch type/design 3's are even louder. I can hear those echoing thru my headers when under the truck.

 

What exactly is a pressure burst? How does it work and is there a way i can force the truck to do this so i can watch for a leak?

I just put new plugs in about 10,000 miles ago What does the lacquer thinner do?

The ones i have on there now are loud! i can hear them eco off walls when i drive by. At least that's what i think that ticking sound is. Always seems a lot louder when im driving then parked in my driveway reving it up so its hard to know for sure.

 

Coolant pressure within the system. Yes, you pressurize the system. Dealership will have to that, -or a mechanic.
Cleans the contact points. Mineral Spirits, Denatured alcohol will do the same.

You reach inside the boot, grab the spring, pull it past the end of the boot and clean the contact point. Hemostats work best, but you can use a screw driver as well.
Geezzz. Not sure that I have ever heard them that loud. Might try changing them out. But yea, make sure it's the injectors lol.

 

tonight my heater started stinking like coolant and fogged my windshield up! heater core..... are you freakin kidding me!!!!

I seriously can never freakin win with this truck. Its just one thing after another... please excuse me while i go bash my head into the wall lol.

 

Yea, sounds like the coolant system is rotting away. Or the core is starting to plug up. Big job, - time consuming anyway.

 

Yeah so iv heard. Im going to get to experience the joys of this job myself now. I guess i should start doing my research. If the system is rotting away im sure im going to have to replace alot more then the heater core.