 93 ecu on a 90 swap. |
 Aug 26, 2008 - 11:55 AM
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 Enthusiast  Joined Aug 31, '02 From Philadelphia, PA Currently Offline Reputation: 8 (100%)  |
I installed a 93 mr2 ecu in my 90 3sgte. I repined the harness plugs to work with the new ecu. The car drives perfectly but wont idle correctly. It will sit at 650 rpm and want to stall out. Then after a few min of driving it will bump itself up to 950rpm for the rest of the drive. If I put the car in diagnostic mode, it will stall right out.
I was thinking maybe it has something to do with the IAC valve, but wannabe confirmed they should be the same. I know 93s have a slightly different throttle body, so maybe that has something to do with it. Anyone here use a 93 ecu on their 90-92 motor? -------------------- 15PSI - 30MPG - Megasquirt Tuned
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Aug 26, 2008 - 11:59 AM
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 Enthusiast Joined Dec 19, '07 From tx Currently Offline Reputation: 22 (100%) |
I have the same problem - I bumped the idle to 1k and it idles fine but still acts a little funny on startup. It's nothing major but I'd sure like to get this straightened out - this is my one little gremlin left with all of that. I had started to think about cleaning the IAC valve but hadn't found any useful info on how to do it yet.
Was yours working perfectly before the ECU swap and just popped up immediately after? I'm staying tuned so I too can work this out. --------------------  ENGINE: '93 RC 3S-GTE/WRC CT-20b [18-20PSI] PERF: TRD/HKS/ARP/NGK/MSD/ACT/Blitz/STRI/APEX'i/TwosRus/GReddy/Magnaflo/KOYO SUSP: Tein/Bilstein/SusTech/ INT: SS-III SEATS/Toyota Hyper Sports EXT: WRC/TRD/404 QUOTE (lagos @ Aug 25, 2010 - 10:13 AM)  Its a safety feature so that people like you don't end up killing themselves or everyone around them. Slow down Paul Walker. 6GC Chat - Go there: [url="http://www.griffgirl.com/forum/chat/index.php[/url] |
Posts in this topic
lagos 93 ecu on a 90 swap. Aug 26, 2008 - 11:55 AM
lagos Yeah, mine was perfect. Only change was the ecu, s... Aug 26, 2008 - 12:04 PM DEATH Mine was too before the engine came out to be rebu... Aug 26, 2008 - 12:11 PM lagos So your running the 93 motor and the 93 ecu?
One w... Aug 26, 2008 - 1:06 PM DEATH Cool - I'll try that. But not to distract from... Aug 26, 2008 - 1:32 PM lagos I unplugged the IAC valve. Car idle went up. Plugg... Aug 26, 2008 - 10:14 PM lagos I did some research and found out that 93s got a d... Aug 27, 2008 - 12:23 AM Dr_Tweak Sure does sound like a timing issue, remember that... Aug 27, 2008 - 8:28 AM
lagos Yes, I checked the pins twice to make sure that th... Aug 27, 2008 - 10:19 AM |
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