I’m planning to do an EFI conversion on my 2.8 engine with a Peugeot 604 carb manifold. Fuel only (for now) controlled by megasquirt , keeping stock distributor and ignition ecu. Where do I get the vacuum advance for the distributor?
Location: Boston
Posts: 38
I’m planning to do an EFI conversion on my 2.8 engine with a Peugeot 604 carb manifold. Fuel only (for now) controlled by megasquirt , keeping stock distributor and ignition ecu. Where do I get the vacuum advance for the distributor?
Location: Belfast
Posts: 158
My VIN: 4087
Club(s): (DOC-UK)
Interested to follow this. Are you going for something like this?
https://www.demon-tweeks.com/us/webc...ors-webatb400/
Location: Boston
Posts: 38
Not quite. I'll be using a Jeep 4.0 throttle body with a fabricated elbow to attach the throttle body to the carb manifold.
It will be very similar to SpittyBug setup.
TPS and throttle ports.jpgPeugot Manifold002.jpg
I found these pictures on SpittyBug's EFI conversion post.
I'm guessing that Jeep TB doesn't have a ported vacuum connection like original?
If not, and if you're using TPS, you could connect the stock solenoid to an unused Megasquirt output and open it around 3-5% throttle.
If you do use this approach, the OEM solenoid is electrically noisy and need one of the factory filter capacitors to be installed or a flyback diode.
Luke S :: 10270 :: 82 Grey 5-Speed :: Single Watercooled T3 .60/.48 :: Borla Exhaust :: MSD Ignition :: MS3X Fully SFI Odd-fire EFI :: DevilsOwn Methanol Injection
Location: Boston
Posts: 38
The Jeep throttle body only has a manifold vacuum port, which is used for the MAP sensor that is attached to the TB. No ported vacuum.
Correct me if I’m wrong: I assume that the stock vacuum solenoid is connected to manifold vacuum, and it is normally closed, and opens when voltage is applied to the terminals.
Dave M vin 03572
http://dm-eng.weebly.com/
Location: Boston
Posts: 38
Thanks Dave,
Basically I need a solenoid that does exactly the opposite of the stock one, or send power to the stock vacuum solenoid at idle only.
This will only be a temporary solution until I get the distributor hooked up to the megasquirt.
Last edited by Tom_hd02; 05-13-2021 at 12:16 PM.
Location: Illinois
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My VIN: 11408
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Dave M vin 03572
http://dm-eng.weebly.com/