Quote:
Originally Posted by al lkosmal
+1.....on the fuel pump "set up for carbs" .....check your fuel pressure. if you are truly using a fuel pump that is designed for use with carbs, it will not provide the pressure/flow required for EFI. ....Easy to check fuel pressure with the Rasant /AEM system and is a standard step in the setup of the system. Any chance that you were data-logging, while on the dyno?
regards,
al
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I'll throw one in there as well....make sure the vacuum hose to the fuel pressure regulator is hooked up (to your manifold, below one of the throttle butterflies I'm guessing with an ITB setup?); if it isn't you're going to be running out of fuel pressure with increased engine speed.
(even better, have you got a plot or can you run a diagnostic capture, of the fuel pressure whilst you're driving? Not familiar with AEM, I presume it'll allow you to capture live data? And FPR?)
ETA: As another thought, find out whether the AEM can auto-map itself. My old MBE ECU can be put into self calibration mode, used for coarse-grain trimming of the engine, which then gives you a suggested number of points on the 3D map which you can either accept outright, or use as a basis for trimming that area yourself, manually.
If you were able to get some logged data from when you're driving, and where it feels "ok" to you, I'm sure there's a few folk on here who could read something revealing into that data. (Sorry, I'm not one of them!)