SVX Network Forums Live Chat! SVX or Subaru Links Old Lockers Photo Post How-To Documents Message Archive SVX Shop Search |
IRC users: |
#1
|
|||
|
|||
Fix for SVX stalling issue with stock ECU and manual transmission
Hi folks,
For those of you with an EG33 with the stock SVX ECU and a manual transmission: you are likely experiencing stalling when coasting to a stop when the engine is hot. This is due to the ECU being programmed for an automatic transmission which triggers Deceleration Fuel Cut Off (DFCO) when the engine is hot and you are coasting/decelerating to a stop. I have a simple fix for this which has been working well for me in a variety of driving conditions: When depressing the clutch (and ONLY when depressing the clutch), ground the ECU Neutral pin (B10) and add a 200 ohm resistor in series with the coolant temp sensor. This can be achieved with a switch on the clutch which triggers a DPDT relay. The reason this works is because the additional 200 ohm resistor in series with the coolant temp sensor tells the ECU that the engine is not fully warmed up. When the engine is not fully warmed up, DFCO is disabled. Before implementing this mod, be sure to make sure the following components are set to stock settings: TPS, throttle stop screw, IAC valve, Aux air bypass valve. If you are like me, you probably already spent hours fiddling with these to solve the problem, to no avail. Enjoy. Cheers, Matt Fairfax, CA |
#2
|
|||
|
|||
Re: Fix for SVX stalling issue with stock ECU and manual transmission
Also, this fix works with a cold, warm, or hot engine with AC on or off.
|
#3
|
|||
|
|||
Re: Fix for SVX stalling issue with stock ECU and manual transmission
Here’s a schematic...
|
#4
|
||||
|
||||
Re: Fix for SVX stalling issue with stock ECU and manual transmission
where is the stock ECU located, I need to open mine up to see what is causing CEL 45 (atmospheric sensor error).
TIA
__________________
1995 LSI, Added the following - Gear Firm-Up unit (that I sell) together with Power TCU ROM & Power switch, K&N air filter, SVX side badges (USA type), Rear Deck Blower (JDM type), Side front markers (USA type), Side rear markers (USA type), Middle rear light (USA type), USA OEM Fog Lights fitted into NZ OEM glass (NZ OEM headlights had only reflectors fitted) Full set of yellow (90SH) Polish bushes includes 15 min mod, R1 Concepts drilled/slotted/gold finish rotors & Red covered braided brake lines (both from Dayle at Motorsport warehouse), EBC Redstuff brake pads. Full SVX bra (only used for shows). Koni adjustable inserts fitted inside OEM strut body, Zoom lowering springs (2" lower), OEM headlight washers fitted. |
#5
|
||||
|
||||
Re: Fix for SVX stalling issue with stock ECU and manual transmission
You need to share this on svxnation facebook!
__________________
#1 1994 Ls ebony parts car-rip #2 1994 L laguna blue - sold #3 1992 Lsi pearl white - sold #4 1992 Lsi pearl white -Ate two engines - Rip #5 1994 L Laguna Blue fwd - Now Awd and manual - 03 wrx 5mt - 18's stern warp st4s - totaled hit a tree #6 1992 Lsi custom orange parts car #7 1992 Lsi green 4.44 swap. Currently for sale #8 1992 Lsi custom pearl white. Project car... sold #9 1992 Teal 4.44 swapped... sold #10 1995 Laguna Blue. Sti 19 wheels, #11 1994 Laguna Blue. Came with #10 engine and trans are out but plan to put it back on the road. Willing to sell it at any time! 😂 |
#6
|
||||
|
||||
Re: Fix for SVX stalling issue with stock ECU and manual transmission
It's located under the dash, near the kick panel on the drivers side, have to pull the lower dash trim off
__________________
Huck Subaru Ambassador 92 SVX LS-Tour Magnaflow Exhaust, 5-Spd-AWD 88 XT6 AWD 5-Speed "Bride of FrankenWedge" 15 Impreza Premium Sedan 15 Crosstrek XV 5-Speed My 5-Speed "How-To" Write-up 1976 Pontiac Firebird Formula Current Count of Subaru's Owned.... "70" |
|
|