Wide band AFR creeps higher as RPM raises no matter what the VE is set to. Fuel pressure rises with boost. Engine is supercharged and logging boost shows a steady gain in pressure as expected. I have 96 pound injectos and max 8lbs boost. These injectors should be good to 900+ horsepower. I was running 80 MPH at the 1/8 mile - which is less than 400 HP. Engine pulls fine to about 4000 then starts to go flat but will still rev to 6000. So leads me to believe it isn't getting enough fuel. Fuel lines are -10 from the rear sump, split into -8 into the fuel rails and the fuel pump is brand new, good for 1200hp.
Is it possible that I have something messed up on the injector setting that wouldn't allow the injectors to stay open even if the data log shows duty cycle over 130 and pulse width over 25? Both of which to me mean the injectors are staying open 100% of the time. And with this size injectors should just be flooding the engine - but AFR creeps to 14.2.
Pete
AFR Won't Drop
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
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insanezane
- MegaSquirt Newbie
- Posts: 28
- Joined: Mon Sep 22, 2008 5:35 pm
Re: AFR Won't Drop
do you have any type of fuel filter and do you have a boost referenced fuel pressure regultor because according to the duty cycle the injector are wide open
Re: AFR Won't Drop
Thanks Lance, I will give this a try tomorrow.
Pete
Pete
Last edited by slo_5_0 on Sun Sep 28, 2008 5:22 pm, edited 1 time in total.
Re: AFR Won't Drop
Thanks for the thought, yes, I do have a boost referenced fuel pressure regulator and the fuel pressure does indeed rise one to one with boost.insanezane wrote:do you have any type of fuel filter and do you have a boost referenced fuel pressure regultor because according to the duty cycle the injector are wide open