My Turbo Miata Budget Build - Page 3 - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to   Members

DIY Turbo Discussion greddy on a 1.8? homebrew kit?

LinkBack Thread Tools
Old 09-24-2016, 11:24 PM   #41
Thread Starter
Join Date: Dec 2015
Location: Fairfax, VA
Posts: 39
Total Cats: 9
Default COPs

Alright well i figured i would take on installing COPs as I was getting pretty significant breakup on the dyno around 6300 RPM. Went for the Toyota COPs and followed a combination of a few threads on here and the FM big spark kit instructions (since I'm running Hydra). Car fired up on the first crank thankfully. I'm running the COPs as sequential direct fire. good news is Im no longer getting the misfire/breakup at 6300 RPM. Bad news is I'm getting noticeable misfire elsewhere in the rev range. Most noticeably around 4500 RPM. Doesn't seem to happen every time but happens enough to be an issue. The hope was the cops would solve these issues not create them.

Im running the general dwell settings recommended by Jason and most everyone else. My plugs are gapped to .040. I did not use a capacitor or an extra ground strap. I did wire cylinders 1 and 4 and 2 and 3 individually to their cooresponding 12v and ground connectors on the original ignition harness.

Here are some install pictures as this is a build thread after all.

kmo25 is offline   Reply With Quote
Old 09-25-2016, 06:08 AM   #42
Elite Member
iTrader: (5)
Join Date: Feb 2013
Location: Staunton, Va
Posts: 1,602
Total Cats: 105

Wait a minute. ...where's the pic with the hold down bracket?
ryansmoneypit is offline   Reply With Quote
Old 09-25-2016, 11:24 AM   #43
Thread Starter
Join Date: Dec 2015
Location: Fairfax, VA
Posts: 39
Total Cats: 9

no idea what that is.

misfire issue resolved. turns out two of the coilpacks I bought had cracked boots and were filled with some kind of crud/build up inside the boot. This must have been shorting out the spark. Replaced the boots and cleaned the coils. Added some dielectric grease to the plug porcelain and misfires disappeared.

Last edited by kmo25; 09-27-2016 at 10:44 PM.
kmo25 is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Complete Torsen Swap with Subframe - WI Padlock Miata parts for sale/trade 22 05-09-2016 09:12 AM
Turbo built? frenchmiata Engine Performance 1 03-05-2016 07:52 PM
Parting out wrecked miata Delhole94 Miata parts for sale/trade 46 08-19-2007 03:57 PM
Turbo project starts: T25 for a NB '99. What trim/ar? jhoexp DIY Turbo Discussion 7 08-01-2006 04:38 PM
Parts help Delhole94 General Miata Chat 4 07-18-2006 09:50 PM

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 05:00 AM.