I just installed the sparktech non-cdi cop system. But when the car is warmed up, the idle becomes erratic. It seems like the car wants to catch the rpm, but can't, it shoots up and down. The AFR also moves around 12.0 to 15.6. But when I install the OEM ignition this goes away, the idle is rock solid and AFR is 14.6-14.7 constant.

I can't figure out what can be the problem. I tried resetting fuel trims, i.e. disconnecting battery, but no effect. Also uninstalled/ reinstalled so that I can rule out installation problem. Otherwise the ignition is fine, i.e. at high RPM high boost situations.

Any input appreciated.

 

I would put the stock coils back in and see if it fixes it

 

I did. The stock coils don't have this problem.

 

Very interesting Issue.. Did you contact the manufacturer??

 

Spark tech will get you fixed up 100%. Might be a bum coil. Things happen no worries. They'll stand behind their product

 

No, I didn't yet contact the manufacturer. Didn't think its related to the manufacture of the product, but some other problem maybe? The product is top notch in quality.

Does the COPs affect idle after install? if so, how?

 

But How do I know its a bad coil? The car pulls cleanly all the way to redline.

I know SparkTech will stand behind their product. Craig seems a pretty standup person.

 

^just saw this thread. Please drop me an email info@sparktechignitions.net with specifics and we'll be sure to rectify the situation IF it's product related.

 

Thanks. Email sent.

 

^Replied with some suggestions.

 

Its why I love doing business with Craig and the guys at Sparktech, they are always on their game. Something goes south, they have the knowledge and desire to see what they can do to make it better.

 

What was the outcome?

 

idle speed sensor burnt maybe??

 

Here is his update https://www.evolutionm.net/forums/se...ce-review.html

It truly is sad that threads like this get lost but BAD reviews are at the top and get all the attention. One of the reasons I like to post in positive threads myself.

Merry Christmas to ALL

 

Cool - nice of you to send him a new one. You can really only blame the OP for not updating his original thread I guess. I found this though via Google lol. And for myself, being a consumer, I always research what kinds of issues products have before purchasing them (along with researching the good).