Hi there,
I am using the microsquirt on a Porsche 911 SC with 6 throttle bodies. The engine start just fine but the idle is going crazy up to a steady 4500 rpm, the throttle position are almost close. The megatune is showing WUE on. Is this normal, how the engine can run with such high RPM with closing valve? How can I get that RPM down to the right idle? Is this related to the warm up enrichement.
Thanks
Un controlled Fast idle after engine start
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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).
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
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Re: Un controlled Fast idle after engine start
No vacuum leak. Did check everything. Just that my homemade throttle bodies was badly ajusted, slighly open. Wow!, just few degrees make this thing to 4500 rpm. Using 1 throttle body per cylinder is quite something to setup.
Thanks for your response.
Thanks for your response.
Re: Un controlled Fast idle after engine start
What are you using for throttle bodies? You will likely need a Synchrometer to accurately adjust the linkage between throttle bodies to get equal flow on all throttles. What are you using for CLT(cylinder head temp sensor) and where are you placing it? You can get a wide variation of temperature depending on where it is located and whether you are stopped or moving. WUE will have to be adjusted depending what sort of temperatures you are actually measuring.
-Dennis
-Dennis
Re: Un controlled Fast idle after engine start
The bodies are designed and machined by myself. Each one has the ability to have his preset opening at idle, but I realized it will be easier to close then all and control the flow of air by a metering valve installed at the vacuum port. MAP values is obtained to the EC by ganging all 6 vacuum hoses to a manifold. For now, I have no temp sensor on the cylinder at all.
Can anyone who have a 911 with 6 throttle bodies can tell me what is the typical idle speed they run the engine?
thanks
Can anyone who have a 911 with 6 throttle bodies can tell me what is the typical idle speed they run the engine?
thanks
Re: Un controlled Fast idle after engine start
I checked with a friend who uses Weber carbs and he says the idle can be set at 900 or 1000 RPM's.
-Dennis
-Dennis
Re: Un controlled Fast idle after engine start
Great, but for now I cannot do anything since my rpm pickup at the distributor was shorting making the start impossible. That must be the reason why it burns my CDI box.
Thanks for your response.
Alain
Thanks for your response.
Alain