Pro-Flo 4 stalling on cold starts and running rich

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Tuesday

Well-Known Member
Joined
Jan 13, 2023
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Location
Cary, NC
I’ve just had my 1973 Plymouth Scamp back from the shop, it’s powered by a modified 360 Magnum. It’s running a Pro-Flo 4, that’s been completely factory reset, as it’s had all sorts of fuel pressure problems. Now has new fuel regulator installed and TTI headers, so had to had ECU reset to self learn - only problem is now it starts lumpy, and as soon as I give it some throttle, not the full heavy right foot, it stalls when it’s cold - when engine is warm it starts straight up. Also, smells like it’s running rich. Any Pro-Flo 4 aficionados or users have anything to share - some say remap. I’m away this week, but scratching my head getting ready to play with her and sort her out next weekend. What do we think it could be? Not had this before!
 
Need more details, please supply an image of your PF4 Digital Display at idle plus what number Map are you using? Please also describe your complete fuel system including your regulator brand, how it is plumbed and whether it is vacuum referenced?
 
I’ve just had my 1973 Plymouth Scamp back from the shop, it’s powered by a modified 360 Magnum. It’s running a Pro-Flo 4, that’s been completely factory reset, as it’s had all sorts of fuel pressure problems. Now has new fuel regulator installed and TTI headers, so had to had ECU reset to self learn - only problem is now it starts lumpy, and as soon as I give it some throttle, not the full heavy right foot, it stalls when it’s cold - when engine is warm it starts straight up. Also, smells like it’s running rich. Any Pro-Flo 4 aficionados or users have anything to share - some say remap. I’m away this week, but scratching my head getting ready to play with her and sort her out next weekend. What do we think it could be? Not had this before!
I’m very proficient with this system. Call me during the week.
 
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