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05-19-2007, 07:11 PM | #1 |
Scooby Newbie
Member#: 58251
Join Date: Mar 2004
Chapter/Region:
Tri-State
Location: Northeast PA
Vehicle:2004 Sti GT35R 530whp @ 27psi |
Question about high idle on Hydra
Hopefully some of you more experienced with the hydra can help me resolve a small problem I encountered after installing the following mods:
perrin 815cc injectors, GT52, APS Inlet, APS Fuel rails (Hydra has been in the car for over a year) So after getting all this installed, I load the base map, and the car is idling at 1200rpm, I check the Idle speed target for 90c coolant temp, and its set to 904 target (Yes coolant temp was currently at 90c, so I was in the right load site too ) I double checked, my TPS is calibrated properly (min set to 43, max at 160ish), so it is reading 0***37; TPS at idle, my idle P,I,D is 135,195,50 respectively, min PWM is at 20, I tried setting it to 5 but no noticeable change. AFR's at idle are (now) 14.7:1 after I removed some fuel in the -535mmHG / 600-1200rpm load sites from the base map. What else could I be missing to get the idle to drop down to where it should be? I did the simple vacuum leak tests involving pinching some hoses, spraying some choke cleaner in various areas listening for an idle increase, and found nothing of the sort. Am I doing something stupid or forgetting a setting? A 1200-1300rpm idle tends to get a little annoying after awhile As soon as phil gets back from europe I plan on getting it tuned by him, I Just want to get some of the minor tuning out of the way and make sure there are no mechanical problems before that point.
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05-19-2007, 07:15 PM | #2 |
Scooby Newbie
Member#: 56133
Join Date: Feb 2004
Vehicle:2004 Euro spec Sti Black - Rotated gt3037s |
Go to SELECT-OUTPUTS menu,
Check that if ISCO is selected in one of the PWM's, if it is not selected, ISCO is selected in PWM 4, in my map. Hope it helps.. |
05-19-2007, 07:28 PM | #3 |
Scooby Newbie
Member#: 58251
Join Date: Mar 2004
Chapter/Region:
Tri-State
Location: Northeast PA
Vehicle:2004 Sti GT35R 530whp @ 27psi |
PWM Map 4 is the boost control map on the USDM STi's, I would assume that yours is different being a euro spec?
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05-20-2007, 06:09 PM | #4 |
Scooby Newbie
Member#: 56133
Join Date: Feb 2004
Vehicle:2004 Euro spec Sti Black - Rotated gt3037s |
I dont mean the PWM MAP 4 , i mean the PWM 4 in the OUTPUTS MENU, PWM MAP 4 is also boost control in my Hydra , but the one in the outputs menu is different.
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05-20-2007, 06:55 PM | #5 |
Scooby Newbie
Member#: 33364
Join Date: Feb 2003
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05-20-2007, 07:03 PM | #6 |
Scooby Newbie
Member#: 56133
Join Date: Feb 2004
Vehicle:2004 Euro spec Sti Black - Rotated gt3037s |
Yes, that is exacty what i tried to explain.
This is the correct selection, Thanks ! |
05-20-2007, 09:19 PM | #7 |
Scooby Specialist
Member#: 110648
Join Date: Mar 2006
Chapter/Region:
PRSIC
Location: San Juan, Puerto Rico
Vehicle:2005 Hydramist 35R82 93oct 479whp 456tq |
if you have an sti, I believe a map that affects the idle is on the 2d pwm map 2. s/b around 0%X = 22, 7%X=33.2, 13%X=46.8, 20%X=60.4 and after that 74.8 all the way to the end. Mine came high in the first three values and would idle at about 1500.
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05-22-2007, 09:41 PM | #8 |
Scooby Newbie
Member#: 58251
Join Date: Mar 2004
Chapter/Region:
Tri-State
Location: Northeast PA
Vehicle:2004 Sti GT35R 530whp @ 27psi |
My 0X site was at 20, lowering it to 8 brought my idle right down to the idle target of 904 - hopefully PWM2 does control the ISC, and this does not have any negative side effects, thanks for the suggestion.
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05-22-2007, 11:05 PM | #9 |
Scooby Specialist
Member#: 110648
Join Date: Mar 2006
Chapter/Region:
PRSIC
Location: San Juan, Puerto Rico
Vehicle:2005 Hydramist 35R82 93oct 479whp 456tq |
It does controls the ISC. For some reason yours had to be lower. It worked? Great!! Just passing the favor. I had the same issue and a fella helped me out back then...
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05-22-2007, 11:14 PM | #10 | |
Scooby Newbie
Member#: 58251
Join Date: Mar 2004
Chapter/Region:
Tri-State
Location: Northeast PA
Vehicle:2004 Sti GT35R 530whp @ 27psi |
Quote:
(Here: http://www.hydraems.com/forums/viewt...hp?p=1490#1490 ) (Oddly enough, it looks like your thread LOL) So I should probably put that back to 20, and go from there. From that post, it sounds like I will need to raise the I of my ISC, however I had it up to 195 and was still idling ~200rpm higher than the target. Its not like its the end of the world, I can tolerate a 1200rpm idle until I get to bring the car in for a tune |
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06-01-2007, 10:32 AM | #11 |
Former Vendor
Member#: 54918
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Gaithersburg, MD
Vehicle:673 WHP Element Tuning Pro Comp Engine |
Most of the information posted here is incorrect for the STi. The STi is DBW and does not have an idle speed control valve so DO NOT MAKE CHANGES TO YOUR OUTPUTS. If your idle is high then look for a vacuum leak and if you are confident there are none then PWM Map 2 is for adjusting DBW idle. On most Hydras that are not brand new as in shipped this month you cannot use a value below 20. On new Hydras shipped in May you can go lower. This map would be similar to adjusting the minumum pwm duty for the WRX. Also increasing the integral under isc settings will also lower the idle. Typically the base settings of 20 for PWM Map 2 and 175 for the integral should deliver an idle around 800 to 900 rpm.
Thanks, Phil www.elementtuning.com |
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