FiTech EFI Tuning Forum

Please or Register to create posts and topics.

Stalls during hard acceleration

Bogs or stalls during snap or quick acceleration.  Idles great, runs goods when I slowly accelerate all the way to WOT(file: data log 12.5.25(2)).  Fuel pressure is at 56PSI, doesn't drop off at idle when I open up throttle.  I have adjusted both accel pump values by 10 unit increments from minimum to maximum values, didn't help.  I have set timing and idle IAC.  Talked to Techs at FI Tech - not much help...

Sent GoEFI 30002 in to FI Tech at their request so that they could bench test - they said it's ok.

Engine is mild build chevy 350, vortec heads, dual plane intake, cam (lobe seperation 114deg, duration 266/276, valve lift .500/.510).

Data log attached when accel pump value set to 65.  At row 300 is an example of stall condition(file data log12.5.25(2)), to me it looks like its going lean but I'm new to tuning on these units.  When I increased accel pump values past 65 it did not solve issue.

Uploaded files:
  • You need to login to have access to uploads.
Austin DeHaas has reacted to this post.
Austin DeHaas

Your Learn is maxed out positive and your Trim is still commanding even more fuel.  You either have a the wrong base file loaded or you have a fuel delivery issue.

Accels are not your issue right now.