Hey everyone,
So I just changed my coils to some new 9U version coils because I was experiencing power loss after 30 mins or so of hard driving. I also replaced the wires with magnacore ignition wires. After I was done, it started right up and I took it out for a spin. The throttle seems less responsive than it was before I did the swap. It is especially noticeable in first and second gear. I was wondering what you guys recommend I do. I do have proscan with a USB to CANBUS cable so I can check some things as far as the electronic side goes. Any help is greatly appreciated. Thanks!

 

Stupid question;
Did you verify that the plug wires are on the correct plugs and firmly seated?

 

^^^ that was going to be my FIRST question.

 

or the coil trigger wiring plugs are mixed up and installed in the wrong coil position

 

The old wire connectors and plug wires were labeled 1 2 3 4 I replaced the coils all first because they are not plug specific. I then followed the wires down and replace one wire at a time. They are all in the right positions. The connectors were all checked multiple times cause I'm real **** about that kind of stuff. Do the coils have a break in period like brakes where they won't work to their full potential until a 100 miles or so?

 

no break-in. Should work on first run.

 

Could be coinecedence that your cat is bad.

Check your ground for the coils.

Mine came loose.

what are the conditions of your plugs?

 

My plugs only have 2000 miles on them and they looked great when i checked them. I couldn't justify buying new ones right now. I don't know about the cat. The car seems to have a lot better response now that I did a full ECU reset and learning. I'll keep you guys posted.

 

That's yer problem right thar.

 

I've ran the 10mm Magnecore wires now for 20,000 miles and have had no issues. This is on the stock coils though. Am I to assume you've found these wires to not be up to the task?

 

The build quality of the wires is excellent. They went on to the coils and plugs with a solid feel. They were recommended by many people on this forum so it obviously is not the wires.

 

Wow. That's some great logical thinking right there.

 

 

What I'm saying is that the wires are obviously not the problem. The wires were tested with my ohm meter to measure the resistance and all four wires were lower than the stock ones. I believe the problem lies in the ECU being that the coils are new I think the ECU has been trained for the old coils so I'm going to try a full reset and see how it goes.

 

What I am telling you is that there is nothing obvious in your observation.

Completely meaningless measurement.

You believe this to be a possible scenario, but you are dismissing the wires on the basis of a recommendation and a spurious reading with an ohmmeter?

 

The ECU doesn't "learn" the coils.....they either work or they don't

The Dwell might change based on RPM or load...but the PCM tells the coils what to do..no feedback loop except for missfires and knock

 

well I did a full ECU reset including the KAM and NVRAM reset. I gave the car a good 30 mins running to let it learn how to idle again and then I took it out. I can feel a huge difference in the low RPM's. The car seems more balanced now where as before it would only begin to pull above 7K. I'll keep everyone posted as to how this improves over time. I would also like to thank maniac and dan for their friendly and helpful input with my problems. I am only 17 and I have done every repair or upgrade to my 8 on my own. I will never go to any dealer unless absolutely necessary. I come to the forum regularly because I hold many people on here in high esteem because of their knowledge and experiences. Thanks again everyone for your help.

 

Highly commendable!

Excellent. You will do well.

Glad to see it worked out for you.

 

Thanks maniac. I thought I would try to reason this out before I started getting pissed about what you and dan were saying. I had a gut feeling that it was something electrical being that the car would come alive after 7K. I appreciate everyone's help and I'm looking forward to my next upgrade. ( RB flash, exhaust, and intake) Any advice?

 

Forget the RB flash. There are better choices.

Exhaust and midpipe are the best bang-for-the-buck combo.

 

well FWIW I ran them without issue, with the original Dec/2004 ignition coils that never went bad no less ...

 

You got lucky.

 

had the same feeling here too. whaddaya make of it MM?
well actually, i had the magnecor 10mm put on with only 2k miles on the car as i got the wires at 7stock right as i got my car. but then it started behaving badly, so i took them off. it was no better with the stock ones until the dealership gave me a the updated flash.

needless to say, it felt like how it should be the very first block of test driving.

mazdamaniac, what evidences did you have that its the magnecors fault in this? i also checked the ohm readings of both stock and magnecor 10mm wires dead cold. the low resistance on the magnecors was what i went with putting the set in.

i'm still considering putting them in since i didn't get around to putting them back in after the dealer reflash visit. but is there something here u know about them that i don't MM?