AFR's drastic change when electrical load added.

s300 and SManager software questions & answers
Post Reply
Daz81
Posts: 13
Joined: Wed Nov 25, 2009 3:35 pm

AFR's drastic change when electrical load added.

Post by Daz81 » Tue Apr 15, 2014 6:02 am

Hi Guys,

I have 2 customers who are having this issue now.

With the engine running and afr spot on no issues, but as soon as any for of electrical load is added ie head lights on, fan on etc the AFR suddenly go lean by like 1.2 AFR's so were idling at 14.5 turn the head lights on adn thats drops to 15.7, turn the lights off and it settles, Its not just at idle and does it over the whole map.

Both cars are running grams 550cc injectors with the voltage/dead times added in as per the info supplied with the Grams injectors.

Ive read others having the same problem but nobody seems to post up how they fixed it.

Any help/info appreciated.

User avatar
Hondata
Site Admin
Posts: 8717
Joined: Thu Aug 15, 2002 12:13 pm
Location: Torrance, CA
Contact:

Re: AFR's drastic change when electrical load added.

Post by Hondata » Tue Apr 15, 2014 8:01 am

There are different ways of measuring the dead times and we've found some manufacturer data is way off. If the afr goes lean when the voltage drops then you need to start adding to the dead time at lower voltages.
Hondata

Daz81
Posts: 13
Joined: Wed Nov 25, 2009 3:35 pm

Re: AFR's drastic change when electrical load added.

Post by Daz81 » Wed Apr 16, 2014 1:32 am

OK, I will try that and get back to you.

Thanks

Post Reply