I have a 2005 NA Ap2 with test pipe and cat-back. Walbro 255 fuel pump.

just got tuned by evans remotely and the car just doesn’t want to cold start. I have confirmed fuel and spark. Car cranks forever and no start. I will attach my trigger scope test that shows my trigger 2 (cam sensor A) only shows 0.20 volts instead of 5. I have a brand new sensor and tried swapping sensors didn’t work.

Evans played around with crank fuel and other things to try and get it to start and it doesn’t want to start.


A friend mentioned possibly sending unit fuse? Don’t know what that is but any help in my situation would be greatly appreciated thank you.

this is a current problem that I’m actively working on in the next week or so will post updates for others.

 

Did you just install this ECU? Can this ECU be easily set back to OEM tune or the OEM ECU put back? Either would answer the question "Where's the source of the problem?"

-- Chuck

 

just installed the ECU couple of weeks ago and since the beginning of the tuning process it was having this issue of low voltage for cam sensor A. The tune file was tested on another s2000 same setup and it worked fine. Also the car starts up fine with the OEM ECU.

 

Seems the car was running normally during the remote tune process. Do you recall anything you did to the car or engine since the last time it started -- between this tune and the last? Any connectors disconnected since the last time it started (low voltage could be misaligned or dirty connection)? Any ground screws removed/replaced?

Be nice if anyone knows what fuse protects this circuit. If not methodically pulling and checking each fuse seems in order. Just move down each column. Seems a waste of time checking the windshield wiper fuse but removal/replacement can wipe corrosion from the contact areas (preventive maintenance) and you're under the dash anyway.

Hope it's as simple as a fuse.

-- Chuck

 

nothing done to the engine before the tune. I’m not sure if there is a fuse for cam sensors but even if that was the issue I would think there would be 0 volts if it was a fuse problem. but the fact that there is 0.20 volts seems like it’s a bad connection.

i will do more testing tonight and will post any updates. Thank you very much.