chevy 4.3 with holley projection
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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.
chevy 4.3 with holley projection
Need help. Currently have a chevy 4.3 v6 with HEI igniton and holley projection. Just can not get it to run properly holley says not compatable with a v6. is their a way to trick computer to think its a v8 or what new computer can i go to drive holley throttle body i already have o2 sensor installed. if slowly accelerating engine falls flat and back fires at 2200 rpm range. If accelerate hard past it engine will rev to 5k. rich lean shows engine goes way lean at time of backfiring. thinking has to do with the trim and switch over points of fuel map. and to top of problem have a trip planned in a week and a half need to resolve asap. Thank you for help.
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Matt Cramer
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Re: chevy 4.3 with holley projection
Just about anything in the MegaSquirt lineup has been used with the Pro-Jection throttle bodies. Biggest question: How many wires are on the idle control valve on this one? Holley used a couple different styles over the years.
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DonTZ125
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Re: chevy 4.3 with holley projection
The Holley ECU may not know what to do with a V6, but the MS has no such issues.
Not sure what you mean by "switch over points of fuel map."
Not sure what you mean by "switch over points of fuel map."
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kjones6039
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Re: chevy 4.3 with holley projection
I'm not sure I understand.........echas9 wrote:Need help. Currently have a chevy 4.3 v6 with HEI igniton and holley projection. Just can not get it to run properly holley says not compatable with a v6. is their a way to trick computer to think its a v8 or what new computer can i go to drive holley throttle body i already have o2 sensor installed. if slowly accelerating engine falls flat and back fires at 2200 rpm range. If accelerate hard past it engine will rev to 5k. rich lean shows engine goes way lean at time of backfiring. thinking has to do with the trim and switch over points of fuel map. and to top of problem have a trip planned in a week and a half need to resolve asap. Thank you for help.
You are still running on the Pro-Jection ecu? I am not even a little bit surprised that the Holley will not work with a V6......
Why, a shiny new MS of course!what new computer can i go to drive holley throttle body
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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Matt Cramer
- Super Squirter
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- Joined: Sat Jul 03, 2004 11:35 am
Re: chevy 4.3 with holley projection
The early Pro-Jections used a pretty crude tuning method where you had one adjustment knob for a high RPM range and one for low RPM, and a couple others. You couldn't change the RPM point where one knob stopped and the other began.DonTZ125 wrote:The Holley ECU may not know what to do with a V6, but the MS has no such issues.
Not sure what you mean by "switch over points of fuel map."