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Old 05-13-2009, 04:14 AM   #1
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Default new supra owner. with some problems

Just bought an 89 7mge and i'm having idleing problems. when i start the car it'll idle starting at around 850 and shoot up to 3000 rpms at a steady rythm. any suggestions?
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Old 05-13-2009, 04:19 AM   #2
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It is supposed to iddle at 800 rpm.
So no wories there !
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Old 05-13-2009, 04:38 AM   #3
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I'm trying to figure out why its going back and forth between 800 and 3000
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Old 05-13-2009, 08:50 AM   #4
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Check you vacuum lines first, theres a thread here somewhere showing you all the vacuum line locations. Then you want to check the timing. After that check your TPS to make sure it's still operational and sitting in the right position. Check the TPS screw as well and make sure it's not twisted up too high. Lastly check your ISCV. Just pinch it a bit see if it brings down the engine rpm a bit. Doesn't mean it's the ISCV, it's just to see how the engine reacts.
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Old 05-13-2009, 10:53 AM   #5
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Also try to check if the MAF sensor is wired.
When you drive it is all ok?
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1988 yelow manual turbo targa
HKS ssqv bov
Hose Techniques silicon hoses
Forge manual boost controller
boost gauge
K&N FIPK
ACT clutch kit HD-G6
Fidanza lightened flyweel
550cc RC Injectors
255lph Walbro Fuel Pump
LIPP Lexus AFM Replica
3" turbo back echaust with divorced
downpipe and no cats.
Aeromotive FPR
Aem Uego Wideband Gauge+O2 sensor
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Old 05-15-2009, 06:16 PM   #6
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I haven't driven it yet i picked it up for $500 about a month ago. It's in great shape except for the idling. I'm checking the vacuum lines and replacing the ones that need replaced this weekend. There's also a few sensors that that look like they need replaced too. Hopefully I'll have it running right by the end of the weekend. I'll keep you guys updated thanks for the help.
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