excaliburcombo
Member
- Joined
- Jan 12, 2010
- Messages
- 168
Hi EK9.org
Need some opinion are tight valve lash will causing rich a/f ratio. We having wideband road tuning and all seem ok (part tuning 14.7-15 AFR WOT 13 AFR). After 1 week we decided to do valve lash adjustment due to idle not stable. Checked valve lash a bit tight from factory spec. Readjust back to factory spec in 0.15mm and ex 0.17mm now idle back as normal. But notice my LTFT add fuel percentage more (12%). Before valve lash adjustment the LTFT (5%).
Need some opinion are tight valve lash will causing rich a/f ratio. We having wideband road tuning and all seem ok (part tuning 14.7-15 AFR WOT 13 AFR). After 1 week we decided to do valve lash adjustment due to idle not stable. Checked valve lash a bit tight from factory spec. Readjust back to factory spec in 0.15mm and ex 0.17mm now idle back as normal. But notice my LTFT add fuel percentage more (12%). Before valve lash adjustment the LTFT (5%).