sweetj

Just wanted to see if anyone else with the AP1-AP2 set up has gotten the P0170 and P0171 CELs. Thanks J

nissfam

What modifications have you done? VAFC I am assuming??? If you are getting a code that says the car is running too lean then the ECU is reading values that show lean. If you are still at stock settings then you may have set something wrong in your intitial set up or have it wired incorrectly maybe.

I got a few CEL's when I first started tuning mine. (AP1) I cant remember the code # but it was "Manufacturer Controlled Air/Fuel Ratio" This code would be thown when at half throttle conditions while at the cam change over. With tuning and learning more I was able to get rid of that.

I am assuming this is the problem that you are talking about....if not I am way off

nissfam

I only assumed that you have a VAFC issue because you ask the question in the other thread about this... If you dont have one it could be an oxygen sensor sending bad values to the ECU. I am fairly new to the S2000 and honda's alike but these are the only things that I can think of that would cause this problem. Maybe a good starting point though?!

sweetj

I don't have a VAFC I have the AP1 ecu and the F22c motor. The O2 sensor is just fine. The shop is suggesting I get a VAFC to tune the fule ratio since I'm running that set up.

nissfam

Aahh! Sorry for jumping to that conclusion... Yeah, VAFC II would definitely help your problem then. So I have sort of a newb question then. Is there an advantage to running the AP1 ECU with the F22 motor or is that just what you have to work with? In that case I would guess the obvious options would be of course AP2 ECU, VAFC II, or the best thing would be AEM EMS!!! You could definitely take care of any issues you may be having with that for sure...

sweetj

I blew my engine in Sept so that was my option at the time. Now to decide wut is the best option.

J

Billman250

DO not get a VAFC to tune the engine, you will cook it. The AP2 engine is borderline lean with the 00-01 ECU but will hold up ok. Tuning for addl power will bring up the piston temps enough to scuff the bores.

That setup in bolt-on form should run fine with no issues, and no CEL.

sweetj

Bill Thats what I figured but now I got an the running leab cel's. What should I do?

Slows2k

Which injectors are you using, the originals or the new ones?

clawhammer

Can't you use the VAFCII to ADD more fuel?

To the OP. Why don't you stick the car on a dyno with a wideband and that will tell you your A/F ratios.