Idle problems with motor swap - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 05-16-2009, 06:13 PM   #1
Junior Member
Thread Starter
 
Join Date: Dec 2007
Posts: 62
Total Cats: 0
Default Idle problems with motor swap

Hey all- first off here is my setup

70k '99 motor in a 1990 chassis (Naturally aspirated for now)
stock '90 ECU
RX7 MAF
'99 injectors/rail/etc.
'90 FPR.
Swapped all '90 sensors, etc as per the usual flyin miata swap. '90 Throttle body.

When I first did the swap everything ran FINE. Idled at 13-1400ish cold, 800 warm. Autocrossed the car once, and it idled high the rest of the day/drive home, then returned to normal. Autocrossed the car again and the idle was high from there out. ~2kish when warm. I adjusted the idle screw all the way down to make it livable, but now it idles at about 800 cold and 1200 warm. Any ideas as to why the idle would have just reversed like that? I was going to just megasquirt it and assumed that would solve the problem, but fixing the problem instead of covering it up would be preferable FYI- when the problem first showed up I was running the '90 MAF, the second time it showed up (when it never went away) I was running the RX7 one.

TIA
mtbgael is offline   Reply With Quote
Old 05-16-2009, 11:19 PM   #2
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

just swap to ms.
hustler is offline   Reply With Quote
Old 05-23-2009, 06:34 PM   #3
Elite Member
iTrader: (13)
 
Join Date: Dec 2006
Location: Taos, New mexico
Posts: 5,703
Total Cats: 237
Default

My car idled terrible before I went ms. Perfect idle with minimal droop now with ms.

I assumed my problem was the afm. Not sure though.
Fireindc is offline   Reply With Quote
Old 05-23-2009, 08:53 PM   #4
Junior Member
Thread Starter
 
Join Date: Dec 2007
Posts: 62
Total Cats: 0
Default

Thanks...haha I guess I'll just MS it.
mtbgael is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Noob to Miataturbo from MA JxPhan Meet and Greet 3 10-02-2015 03:17 AM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 02:49 AM.