Did a EDIS conversion and everything worked great. I then switched from a MPI to a TBI setup and now my rpm's are about half of actual. i cant figured out what it could be. The only changes I made were to the fuel settings. Any help would be greatly appreciated.
Chevy 4.3L V6
EDIS 6
MS II PCB 3.0 v2.89
here is a MSQ and a datalog. RPM was staedy just half what it should be. I am aware of the VE values etc being off. I just started to retune the fuel setti ng with the new TBI.
FORD EDIS RPM READING ABOUT HALF OF ACTUAL
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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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Army of Six
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FORD EDIS RPM READING ABOUT HALF OF ACTUAL
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Army of Six
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Re: FORD EDIS RPM READING ABOUT HALF OF ACTUAL
Maybe I should clarify. The motor runs ok. Idles ok at approx 850-900 rpm but in mega tune it shows me idling at 350-400. And the injectors on my tbi are high impedance.
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kjones6039
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Re: FORD EDIS RPM READING ABOUT HALF OF ACTUAL
Where are you getting your tach signal from EDIS?
MegaTune? Really? Why not TunerStudio?
A couple things with your msq!
2.89 code is getting a bit old now, I think. You might consider upgrading!
6 cylinders with 4 injectors? Makes calculating Required Fuel a bit difficult.
Cranking speed = 190? Awfully low!
These have nothing to do with your rpm issue but just something I noticed that will effect your tuning efforts.
Ken
MegaTune? Really? Why not TunerStudio?
A couple things with your msq!
2.89 code is getting a bit old now, I think. You might consider upgrading!
6 cylinders with 4 injectors? Makes calculating Required Fuel a bit difficult.
Cranking speed = 190? Awfully low!
These have nothing to do with your rpm issue but just something I noticed that will effect your tuning efforts.
Ken
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
MS2 v3 w/ms2extra 3.4.0 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
MS2 v3 w/ms2extra 3.4.0 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
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Army of Six
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Re: FORD EDIS RPM READING ABOUT HALF OF ACTUAL
Hey Ken. Thanks for the reply. I know the stuff is dated. I pulled it years ago then recently decided to put fuel injection back on. Already had mega tune and my ini files Etc ready to go. That being said tonight I will be installing tuner studios and 3.3.3? tonight. The low cranking rpm was an attempt to solve a starting issue which I wasn't able to. ThAts why I went back to a TBI. I fabricated the TBI with four #48 injectors (left over from another project).
As for the tach signal, I am getting it from pin 1 (pip) on the EDIS. My tach signal in mega tune was perfect since the recent Edis install I don't know. But there she sits
As for the tach signal, I am getting it from pin 1 (pip) on the EDIS. My tach signal in mega tune was perfect since the recent Edis install I don't know. But there she sits
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Army of Six
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Re: FORD EDIS RPM READING ABOUT HALF OF ACTUAL
Update. I downloaded and installed v2.920 and tuner studios ( big thumbs up so far). So far my rpms are looking good after the update. Must have been a glitch in the older version.
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kjones6039
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Re: FORD EDIS RPM READING ABOUT HALF OF ACTUAL
Ya gotta love it when a plan comes together!!! 
Ken
Ken
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
MS2 v3 w/ms2extra 3.4.0 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
MS2 v3 w/ms2extra 3.4.0 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7