AFR 15 @ Boost! HELP
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Joined: Mar 2008
Posts: 52
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From: Malaysia
You're leaning out very badly on your cold starts...
it runs open loop for about 30 sec on cold startup so my guess is your MAF is jacked up or the MAF table itself is totally off. Try setting MAF table back to stock (or HPX if thats what your running) then starting over.
I basically did 80% of my tune on MAF adjustmanets alone starting with cold starts, then idle, then no load revving, then light load, then boost... the fuel comp table is +/- 5% top to bottom.
it runs open loop for about 30 sec on cold startup so my guess is your MAF is jacked up or the MAF table itself is totally off. Try setting MAF table back to stock (or HPX if thats what your running) then starting over.
I basically did 80% of my tune on MAF adjustmanets alone starting with cold starts, then idle, then no load revving, then light load, then boost... the fuel comp table is +/- 5% top to bottom.
All this while I wasn't tuning using the MAF tables but on the fuel & ignition map instead. Guess I've got it wrong. Any link where I can learn and understand more about tuning uprev the right way?
Thanks.
check the tuning section or search for threads i have created. I had a few threads about tuning in osiris and questions were answered by Jared at uprev. It's very informative.
Are you using HPX or stock? Is it possible if you could post a shot of your MAF adjustment?
All this while I wasn't tuning using the MAF tables but on the fuel & ignition map instead. Guess I've got it wrong. Any link where I can learn and understand more about tuning uprev the right way?
Thanks.
All this while I wasn't tuning using the MAF tables but on the fuel & ignition map instead. Guess I've got it wrong. Any link where I can learn and understand more about tuning uprev the right way?
Thanks.
There's nothing 'wrong' with tuning around your MAF (instead of making some adjustments to the MAF) but you can end up with cold/warm start issues, unstable idle, ect ect. I never did have issues in boost though even when I left the MAF table alone. I think you have a bad MAF or bad MAF signal.
Thread Starter
Registered User
Joined: Mar 2008
Posts: 52
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From: Malaysia
Alright I've did some data logging. Found out that bank 1&2 is leaning out one after the other around the said rpms. Mine Z is a 2003 so I have no wideband as standard. All this while I am relying the AFR from LC-1. Do I have a bad O2 sensor or is it anything worse. This only happen at part throttle. Everything is fine when I go full throttle. Please help
Alright I've did some data logging. Found out that bank 1&2 is leaning out one after the other around the said rpms. Mine Z is a 2003 so I have no wideband as standard. All this while I am relying the AFR from LC-1. Do I have a bad O2 sensor or is it anything worse. This only happen at part throttle. Everything is fine when I go full throttle. Please help
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