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Old 03-29-2008, 03:22 AM   #7
Morley
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Re: TPI cold start injector ?

Quote:
Originally Posted by iroc343
I am using accell 24 lb/hr injectors. Funny thing is, as long as I keep it running and cleaned out for 30 seconds it's fine.
It only "seems" fine. Your rich condition in open loop tells you that something isn't quite right. You are running a MAF TPI system. Because the MAF sensor knows exactly how much air is entering the engine it can compensate for a multitude of "sins" (mods). If you were to run a scanner while your engine is in closed loop I would bet that your BLM's were nearly firewalled at 160.
The Accel 24# injectors aren't 24#. I used to have them in my car after switching from a 305 to a 350 with heavy mods and I had to "lie" to the ECM and tell it they were 20# injectors (makes the injector pulse them longer) to get my BLM's down to the low 130's. I finally replaced them when I got the Accel TPI base and put in LS1 injectors (25#) and only had to fib a little to the ECM to get the BLM's to read 126-130 (the "happy" range).
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