Gen 4 3sgte idle problems
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This area is dedicated to technical discussions that don't fit into the more specific areas of the technical section and that may apply to any type of MR2. E.g. tyres, bodywork and rust repairs, lubrication etc. Please try to spell correctly because this will help people find information later if they are using search functionality. If you need assistance with your car and want to host a spanner day, please use the appropriate section of the forum: http://mr2.org.nz/phpbb3/viewforum.php?f=35 Thank you.
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Gen 4 3sgte idle problems
Hi all I’ve done a gen 4 3sgte swap in my 1996 mr2 and it has some trouble it doesn’t idle at all when it cold and when it’s up to temp it idles very low and runs rich at idle would it have anything to do with the stud that broke off in the pic? Thanks all
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- Benckj
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Re: Gen 4 3sgte idle problems
That’s simply the stop for holding TB butterfly open a tad. Doesn’t sound like your problem. Are you running the gen4 ECU, TPS and IACV?
Jim Benck
90 rev 1 parts car
98 rev 5 GT- all the mods
90 rev 1 parts car
98 rev 5 GT- all the mods
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Re: Gen 4 3sgte idle problems
I might have to check the wiring for power to the IACV. Or at least you could do the check as I can't come see you. I didn't touch the other 2 wires, just the one to get power to the valve for the ECU to ground either way.
Power should be from pin 2 which is black with red to the centre pin on the idle valve.
Power should be from pin 2 which is black with red to the centre pin on the idle valve.
1990 SW20 MR2 G-Limited (GEN4 3SGTE Installed)
2000 AE111R Corolla Wagon NZ New Daily
1996 AE101R Corolla Sprint NZ New Selling Soon
1990 EP81 Starlet XL (Sold)
1990 EE90 Corolla XL (Sold)
Instagram https://www.instagram.com/sw20glimited/
2000 AE111R Corolla Wagon NZ New Daily
1996 AE101R Corolla Sprint NZ New Selling Soon
1990 EP81 Starlet XL (Sold)
1990 EE90 Corolla XL (Sold)
Instagram https://www.instagram.com/sw20glimited/
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Re: Gen 4 3sgte idle problems
The IACV may possibly need a good clean.
Boosted cars are like hot women.
A little edgy, every guy wants one,
some guys can't handle them,
and if you throw a little alcohol in them they'll rock your world.
A little edgy, every guy wants one,
some guys can't handle them,
and if you throw a little alcohol in them they'll rock your world.
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- Club Member - MR2OCNZ
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- Joined: Sun Sep 03, 2017 8:00 pm
- Stomping Ground: Wellington
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- First name: Kyle
Re: Gen 4 3sgte idle problems
Great thanks for the tips guys I’ll check up on all that and hopefully it’ll work
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- Club Member - MR2OCNZ
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- Joined: Sun Sep 03, 2017 8:00 pm
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- First name: Kyle
Re: Gen 4 3sgte idle problems
Thanks so much guys I checked the wires and they had power to I pulled the IACV out and cleaned it now its nice and shinny now the car idles perfectly when cold and then drops down a bit once it’s up to temp as it should
- Benckj
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Re: Gen 4 3sgte idle problems
Good work. The IACV seems to be a common fault with 3sgte’s and not many owners ever look at until it fails.
Jim Benck
90 rev 1 parts car
98 rev 5 GT- all the mods
90 rev 1 parts car
98 rev 5 GT- all the mods
- GDII
- Forum Moderator - MR2OCNZ
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- Joined: Sun Jul 10, 2011 5:13 pm
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Re: Gen 4 3sgte idle problems
Glad you got it sorted. Always frustrating to have a car that won't idle properly. These valves are never cleaned so quite often stick.
1990 SW20 MR2 G-Limited (GEN4 3SGTE Installed)
2000 AE111R Corolla Wagon NZ New Daily
1996 AE101R Corolla Sprint NZ New Selling Soon
1990 EP81 Starlet XL (Sold)
1990 EE90 Corolla XL (Sold)
Instagram https://www.instagram.com/sw20glimited/
2000 AE111R Corolla Wagon NZ New Daily
1996 AE101R Corolla Sprint NZ New Selling Soon
1990 EP81 Starlet XL (Sold)
1990 EE90 Corolla XL (Sold)
Instagram https://www.instagram.com/sw20glimited/
- GDII
- Forum Moderator - MR2OCNZ
- Posts: 5741
- Joined: Sun Jul 10, 2011 5:13 pm
- Stomping Ground: Wellington
- Prime Mover: SW20
- First name: Phill
Re: Gen 4 3sgte idle problems
It's a 3SGE and 4AGE thing too. I think it's a general 90s Toyota problem now that they are getting older and filled up now with enough stuff to stick them in place.
1990 SW20 MR2 G-Limited (GEN4 3SGTE Installed)
2000 AE111R Corolla Wagon NZ New Daily
1996 AE101R Corolla Sprint NZ New Selling Soon
1990 EP81 Starlet XL (Sold)
1990 EE90 Corolla XL (Sold)
Instagram https://www.instagram.com/sw20glimited/
2000 AE111R Corolla Wagon NZ New Daily
1996 AE101R Corolla Sprint NZ New Selling Soon
1990 EP81 Starlet XL (Sold)
1990 EE90 Corolla XL (Sold)
Instagram https://www.instagram.com/sw20glimited/