Strange behaviour at part throttle
#1
Strange behaviour at part throttle
I'm running 6psi on a d16y8, 450cc and SMC+. I've tuned it on the dyno (full throttle) and got decent a/f ratio. BUT, when i'm at low or mid throttle and accelerating the car start to hesiate a bit, kind of a jerking motion. Does anyone have the same problem with a similair setup?
thank you
thank you
#4
Re: Strange behaviour at part throttle (strangerqc)
You need to tune your partial throttle. When you tune your car at full throttle, it doesn't mean that your partial throttle is automatically tuned.
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#8
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Re: Strange behaviour at part throttle (strangerqc)
you can't really tune open loop with the hack. just avoid it. the ecu tries to run stoich for open loop mode-- i don't think it's all that safe.
#9
Re: Strange behaviour at part throttle (Johnyquest)
When my o2 sensor went bad, at part throttle in open loop the engine hesitated like crazy. Just one more thing to check out after you tried everything else..
#10
Re: Strange behaviour at part throttle (Chrome Pipes)
The fuel maps on the smc are very large. You are prolly just running really rich. The SMC is the problem, not your injectors.
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Re: Strange behaviour at part throttle (strangerqc)
again, that is your fuel curve at WOT, and not at partial throtte/boost. There is a chance you are running too rich at partial throttle.
#13
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Your car is jerking/hesitating under part-throttle because the SMC cuts your MAP signal to allow you to run those larger injectors(like the AFC hack). This problem is also common with the AFC hack.
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