90' NA miata with an NA8 swap, starts then dies. - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 10-19-2015, 10:01 PM   #1
Junior Member
Thread Starter
 
Join Date: Oct 2015
Location: NYC
Posts: 58
Total Cats: 2
Default 90' NA miata with an NA8 swap, starts then dies.

Just bought me a 90 miata with a 1.8 swapped into it, running...iffy. Drove the car home, and it had "flat spots" while cruising but pulled fine under acceleration. Got it close to home and the car died while idling at a light. Restarts for 2-5 seconds then dies, repeatedly. Got it to run again after 30 minutes of fussing around under the hood only for the same thing to happen again on a rough road 2 minutes later.


Here's what I know about the car:
  • Has this coil on plug setup. I see the capacitor where the wires connect to the harness and I see the resistor in the diagnostics box.
  • TPS is definitely not connected to anything
  • Is running a (working, tested it on my other 1.6 miata) 1.6 afm
  • Has the EGR tube crimped and folder over (cheapo blockoff?)
  • Has a new ground off the back of the valve cover to the frame.
  • has a new O2 sensor

I'm hearing suggestions to swap in a 1.8 ecu, at that point id rather buy a megasquirt.

Any helpful input on this is greatly appreciated!
reip is offline   Reply With Quote
Old 10-19-2015, 10:05 PM   #2
Sadfab Union President
iTrader: (3)
 
Join Date: May 2014
Location: Kansas
Posts: 2,690
Total Cats: 113
Default

Why does it have anything other than stock coils on stock ecu? They're probably deader than **** now.

Sounds like a giant hacked up pile of mess, I'd get a megasquirt and fix the hack.
deezums is offline   Reply With Quote
Old 10-19-2015, 10:40 PM   #3
Junior Member
Thread Starter
 
Join Date: Oct 2015
Location: NYC
Posts: 58
Total Cats: 2
Default

Quote:
Originally Posted by deezums View Post
Why does it have anything other than stock coils on stock ecu? They're probably deader than **** now.

Sounds like a giant hacked up pile of mess, I'd get a megasquirt and fix the hack.
even though its seems to be the same mod that braineack has posted on the forum?

being that the harness is already changed to run that Toyota COP connector, would it be wise to just get a Fab9 COP setup?

Last edited by reip; 10-19-2015 at 10:56 PM.
reip is offline   Reply With Quote
Old 10-19-2015, 11:14 PM   #4
Sadfab Union President
iTrader: (3)
 
Join Date: May 2014
Location: Kansas
Posts: 2,690
Total Cats: 113
Default

Yeah, you set proper dwell in your custom ecu. How are you doing that on the stock ecu?

You should buy a megasquirt and fix the hacked up ****.
deezums is offline   Reply With Quote
Old 10-19-2015, 11:20 PM   #5
Junior Member
Thread Starter
 
Join Date: Oct 2015
Location: NYC
Posts: 58
Total Cats: 2
Default

Quote:
Originally Posted by deezums View Post
Yeah, you set proper dwell in your custom ecu. How are you doing that on the stock ecu?

You should buy a megasquirt and fix the hacked up ****.
I have no idea I bought it this way. What does the resistor in the diagnostics box do? And the capacitor at the plug to the harness?
reip is offline   Reply With Quote
Old 10-19-2015, 11:37 PM   #6
Sadfab Union President
iTrader: (3)
 
Join Date: May 2014
Location: Kansas
Posts: 2,690
Total Cats: 113
Default

uh?

Buy a megasquirt?
deezums is offline   Reply With Quote
Old 10-20-2015, 10:10 AM   #7
Junior Member
Thread Starter
 
Join Date: Oct 2015
Location: NYC
Posts: 58
Total Cats: 2
Default

and after I buy the megasquirt, you can adjust the dwell for those specific COP's?

that is if they're still good. I know getting a MS is vital, but if the car still doesnt run with it...I still have the same problem, and a bigger hole in my wallet.

Ideally, all of those COP's couldnt have died at the same time.
reip is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1.6 or 1.8 Slocus13 DIY Turbo Discussion 23 10-27-2015 09:43 AM
Built 1.8 and 6-Speed ihmcguinness Miata parts for sale/trade 9 10-21-2015 11:00 PM
Good Start for a 1.8 swap... Elfering Miata parts for sale/trade 0 10-19-2015 04:41 PM
1.8 swap worth it on a budget? And correct me if my plan is mistaken. 1991 DIY Turbo Discussion 35 10-12-2015 04:28 PM
1.6 Idle help needed teesea MEGAsquirt 7 10-09-2015 02:48 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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:11 PM.