Mechanical issue or setup/tune?
Thread Starter
Evolving Member
Joined: Oct 2009
Posts: 139
Likes: 13
From: Casa Grande, AZ
Mechanical issue or setup/tune?
Im getting this car professionally tuned, but I haven't put many miles on it the past couple years so I wanted to get some dial in to work out any potential bugs and I'm trying to determine if this is a setup issue or a mechanical issue. Mods are-
ID1000s
walbro 255
fuel lab AFPR
omni 4 bar
Intercooler
Exhaust
Hks 264/272s
The car is a 98 eclipse with a 96531706 rom on an evo 8 ecu. Injectors are fresh, on 91 fuel. The front o2 sensor appears to be dead and I plan to lock it into open loop or use the wideband AFR patch to control closed loop until a new o2 sensor comes in. The issue I'm running into is the car goes dead lean when you get into boost. Since my o2 isn't cycling I planned to just dial injector scaling in with a quick WOT and locking the fuel table at a specific AFR to match it up. Using wideband AFR's I feel like my latencies and scaling are in a ball park to be half decent driveability wise to get into some low boost without pegging lean. You can see in the log that anywhere near 100 load (1:1 SDVE) it doesn't seem to be adding any fuel and just goes lean. I thought my AFPR diaphram was sticking but I can boost it with an air compressor and it runs fuel pressure up 1:1. I'd have to drop my scaling quite a bit to get WOT AFR's inline and I don't think scaling should be as far off as it would need to be. Current scaling is 975 and latencies are:
3.648
3.048
1.752
1.32
1.056
0.864
0.744
Am I just that far off on setup so far or does someone see something mechanical causing issues? I've had the car previously running fine on FIC1120 low-z but that was a few years ago. I just switched over to the ID's. Like I said I plan to have this professionally tuned but wanted to work out any bugs before hand. It starts/idles/cruises well enough, but I'd like to get things closer.
ID1000s
walbro 255
fuel lab AFPR
omni 4 bar
Intercooler
Exhaust
Hks 264/272s
The car is a 98 eclipse with a 96531706 rom on an evo 8 ecu. Injectors are fresh, on 91 fuel. The front o2 sensor appears to be dead and I plan to lock it into open loop or use the wideband AFR patch to control closed loop until a new o2 sensor comes in. The issue I'm running into is the car goes dead lean when you get into boost. Since my o2 isn't cycling I planned to just dial injector scaling in with a quick WOT and locking the fuel table at a specific AFR to match it up. Using wideband AFR's I feel like my latencies and scaling are in a ball park to be half decent driveability wise to get into some low boost without pegging lean. You can see in the log that anywhere near 100 load (1:1 SDVE) it doesn't seem to be adding any fuel and just goes lean. I thought my AFPR diaphram was sticking but I can boost it with an air compressor and it runs fuel pressure up 1:1. I'd have to drop my scaling quite a bit to get WOT AFR's inline and I don't think scaling should be as far off as it would need to be. Current scaling is 975 and latencies are:
3.648
3.048
1.752
1.32
1.056
0.864
0.744
Am I just that far off on setup so far or does someone see something mechanical causing issues? I've had the car previously running fine on FIC1120 low-z but that was a few years ago. I just switched over to the ID's. Like I said I plan to have this professionally tuned but wanted to work out any bugs before hand. It starts/idles/cruises well enough, but I'd like to get things closer.
Newbie
Joined: Sep 2013
Posts: 9
Likes: 3
From: Switzerland
Did you remove the injector resistor box?
Because for high-z injectors it needs to be done.
How to bypass the injector resistor box
Because for high-z injectors it needs to be done.
How to bypass the injector resistor box
If you are on gasoline and running 43.5 psi base fuel pressure, your scaling setting is too lean for your ID 1000's. Try setting it closer to 812.
Quote:
Originally Posted by travman
PHP Code:
Quote:
Originally Posted by Rawkus
PHP Code:
Quote:
Originally Posted by travman
PHP Code:
Code:
Code:ID 1000s Scaling: 812 latencies 4.69v = 5.328 7.03v = 3.144 9.38v = 1.992 11.72v = 1.368 14.06v = 1.008 16.41v = .792 18.68v = .624
Originally Posted by Rawkus
PHP Code:
Code:
Code:ID 1000s Scaling 812 3.816 3.144 1.944 1.392 0.984 0.72
Last edited by CDrinkH2O; Mar 20, 2022 at 11:48 AM. Reason: Typo
Thread Starter
Evolving Member
Joined: Oct 2009
Posts: 139
Likes: 13
From: Casa Grande, AZ
If you are on gasoline and running 43.5 psi base fuel pressure, your scaling setting is too lean for your ID 1000's. Try setting it closer to 812.
Quote:
Originally Posted by travman
PHP Code:
Quote:
Originally Posted by Rawkus
PHP Code:
Quote:
Originally Posted by travman
PHP Code:
Code:
Code:ID 1000s Scaling: 812 latencies 4.69v = 5.328 7.03v = 3.144 9.38v = 1.992 11.72v = 1.368 14.06v = 1.008 16.41v = .792 18.68v = .624
Originally Posted by Rawkus
PHP Code:
Code:
Code:ID 1000s Scaling 812 3.816 3.144 1.944 1.392 0.984 0.72
Thread Starter
Evolving Member
Joined: Oct 2009
Posts: 139
Likes: 13
From: Casa Grande, AZ
Got a new o2 in so it would develop trims and ported in new settings. That got my idle and cruise both within +/- 1%, but still lean in boost. Swapped to a MAF ROM and its working fine for that now. Must be something in my SD setup not working, thanks for the settings!
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