Cold start and idle issues on H22A

jdmrocket · Post by **jdmrocket** » Mon Dec 15, 2008 3:17 pm

I have JDM P30 running H22A7 from Accord Type-R.

Just after start up RPM is significantly lower than specified in the calibration during warm-up for about a minute.

Another issue is with idle: I can't set idle RPM lower than 850. This must be a problem with ECU. Because if I plug EDM P30 ECU with the same calibration I can set any RPM. I've played with IACV duty cycle - did not help. If I unplug IACV plug the engine idles at 500-600 RPM.

Post by **Spunkster** » Mon Dec 15, 2008 3:21 pm

Is your IACV 2 or 3 wire?

jdmrocket · Post by **jdmrocket** » Mon Dec 15, 2008 3:26 pm

Spunkster wrote:Is your IACV 2 or 3 wire?

Originally it had 3-wire IACV but I put a 2-wire one.

Post by **Spunkster** » Tue Dec 16, 2008 10:16 am

If it is working correctly with your conversion and a different ecu with the s300, then you may have a damaged ecu.

jdmrocket · Post by **jdmrocket** » Thu Dec 18, 2008 11:02 am

Spunkster wrote:If it is working correctly with your conversion and a different ecu with the s300, then you may have a damaged ecu.

I doubt that. A friend of mine has the same problem (high idle) with JDM p30.

As for low RPM on warm-up - could absence of FITV be the cause? If yes why Hondata does not have an option to compensate?