8th Generation Honda Civic Forum - View Single Post

RedShiftChris · 08-10-2008, 03:02 AM

Hi all,
I've been working with an AEM FIC setup on a TSI turbo Civic LX. I'd like to get some feedback from those of you running a similar setup. Please let me know your current performance of the following and what you did to fix it. Please see a webpage a put together to see what I'm looking at.
REDSHIFT'S TSI TURBO CIVIC AEM FIC DEVELOPEMENT
I show you this to let you know that we have a ton of data to look at. This is not a seat of the pants thing we are doing....we can actually see what is happening.

We've had the following issues, and the following resolutions:

1) Startup and then car dies - we've gotten it so it won't kill. Turned out that the Fuel adjustment from MAP had too negative a number in the low RPM's and was making the car kill when it was warmed up. It started ok when cold because of the extra cold start fuel, but when warm it would kill most of the time.

2) Startup crank time - we have to crank the engine for 2 seconds before the ecu sees rpm (seen on rpm gauge and Honda Datalog System). This is why the car takes so long to start. As soon as the ecu sees rpm, then engine immediately fires the injectors and starts... but for the first 2 seconds, I am seeing no fuel injector (because of no rpm reading). I suspect this is related to the FIC's handling of the crank position signal (becuase it goes through a processor before being sent to the stock ecu). Is anyone at all out there with a Civic able to see rpm immediately when starting the engine, or is everyone seeing it like 2 seconds after first turning the key.

3) Tip-in off idle - We are getting a fairly pronounced stumble with medium to heavy tip-in off of throttle (meaning the transition from no throttle input at idle to some throttle input to rev the engine). I am seeing inconsistent fueling at tip in. Anyone else have this same thing?

4) Actual driving tune (including fuel throttle) seems very good.... Shawn Church did a good job of that. Still the customer has noted a hesitation at mid-rpm under boost that feels a bit like a lean condition and may be related to vtec perhaps? Haven't spent much time with this... anyone else notice this. I think it's actually caused his car to set a check engine light.

I'd appreciate any exchange of information.
Cheers,
Chris at RedShift

08-10-2008, 03:02 AM	#1 (permalink)
RedShiftChris Senior Member Join Date: Nov 2006 Location: Dallas, PA Posts: 1,061 Chris Shenefield	AEM FIC on TSI Turbo Civic Hi all, I've been working with an AEM FIC setup on a TSI turbo Civic LX. I'd like to get some feedback from those of you running a similar setup. Please let me know your current performance of the following and what you did to fix it. Please see a webpage a put together to see what I'm looking at. REDSHIFT'S TSI TURBO CIVIC AEM FIC DEVELOPEMENT I show you this to let you know that we have a ton of data to look at. This is not a seat of the pants thing we are doing....we can actually see what is happening. We've had the following issues, and the following resolutions: 1) Startup and then car dies - we've gotten it so it won't kill. Turned out that the Fuel adjustment from MAP had too negative a number in the low RPM's and was making the car kill when it was warmed up. It started ok when cold because of the extra cold start fuel, but when warm it would kill most of the time. 2) Startup crank time - we have to crank the engine for 2 seconds before the ecu sees rpm (seen on rpm gauge and Honda Datalog System). This is why the car takes so long to start. As soon as the ecu sees rpm, then engine immediately fires the injectors and starts... but for the first 2 seconds, I am seeing no fuel injector (because of no rpm reading). I suspect this is related to the FIC's handling of the crank position signal (becuase it goes through a processor before being sent to the stock ecu). Is anyone at all out there with a Civic able to see rpm immediately when starting the engine, or is everyone seeing it like 2 seconds after first turning the key. 3) Tip-in off idle - We are getting a fairly pronounced stumble with medium to heavy tip-in off of throttle (meaning the transition from no throttle input at idle to some throttle input to rev the engine). I am seeing inconsistent fueling at tip in. Anyone else have this same thing? 4) Actual driving tune (including fuel throttle) seems very good.... Shawn Church did a good job of that. Still the customer has noted a hesitation at mid-rpm under boost that feels a bit like a lean condition and may be related to vtec perhaps? Haven't spent much time with this... anyone else notice this. I think it's actually caused his car to set a check engine light. I'd appreciate any exchange of information. Cheers, Chris at RedShift
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