idle with AC on problem

nunoctr · Post by **nunoctr** » Thu Jul 08, 2010 3:10 am

Hi hondata,

I run a 2007 Fn2 type R, runing AFM cal.

When I dont have the AC on it idles normal, but when I turn on my AC it goes down to +- 500rpm everytime I press the clutch .

What can it be and how can this be fixed?

is there any type of AC idle compensation ?

thanks

Post by **Hondata** » Thu Jul 08, 2010 8:50 am

What does you fuel trim do? Datalog?

nunoctr · Post by **nunoctr** » Thu Jul 08, 2010 8:52 am

I will post a datalog asap

nunoctr · Post by **nunoctr** » Thu Jul 08, 2010 3:13 pm

datalog

see seconds 6 and 14:

nunoctr · Post by **nunoctr** » Thu Jul 08, 2010 3:24 pm

datalog with the ac off:

see seconds 22 and 36. Very different.

Post by **Hondata** » Fri Jul 09, 2010 9:12 am

I've mainly seen this when the idle learn procedure is not complete because the battery is disconnected or the ECU reflashed - it takes 2-4 driving cycles to re-learn. It could also be the throttle body.

The eliminate the throttle body put the return to stock flash in, complete 4 driving cycles from cold, then check if it does the same thing.

ajpturbopittsburgh · Post by **ajpturbopittsburgh** » Wed Jul 14, 2010 1:31 pm

I have seen a drop in rpms when I sit in traffic with and without the A/C on. It sounds like it may stall but it recovers and never does. I have driven the car plenty so it shouldn't be learning idle anymore, correct?

Sorry I don't have a data log

nunoctr · Post by **nunoctr** » Wed Jul 28, 2010 2:35 am

Hi hondata,
well the problem is resolved.

I try the return to stock and it was the same.
So I runed the car for a day with the A/C always on (i never run the A/C as I don't like). The car started to learned the idle with the A/C (in the begin the car had the problem). In the end of the day the car is fine with the A/C on and never goes to 500 rpm.

Don't now if it's the correct, but my car almost have 2 idle learn procedures. One for the A/C off and one with the A/C on.
thanks

soxfan143 · Post by **soxfan143** » Thu Jul 29, 2010 6:31 pm

ajpturbopittsburgh wrote:I have seen a drop in rpms when I sit in traffic with and without the A/C on. It sounds like it may stall but it recovers and never does. I have driven the car plenty so it shouldn't be learning idle anymore, correct?

Sorry I don't have a data log

Yours sounds like a fuel trim issue.