[Diy_efi] CFI

Sat Sep 17 13:13:58 UTC 2005

The only problem with testing them by putting the car in gear is the car is running 1500 RMP and its just about impossible to hold the car with the brake.  I did a test onthe ecm it gave me gode 22 the TPS and 33 the MAP. From my understanding these will also cause the same problem.  It did also give me 12 for the ecm unit.  I have talked to so many people about this CFI that its makeing my head spin the dealer looked at me like i had 3 heads.the problem with those guys all they are is parts changers not much real knowledge left anymore.  I found one guy that has a CFI he says his runs great and not any problems like most people are telling me.  Typically from what i understand the CFI is not much different from the TBI since its just two TBI's any way.  Thanks for your help i do greatly appreciate it.

Steven

Bret Levandowski <skishop69 at yahoo.com> wrote:
Manually or by powering them up? If they're not moving when plugged in, unplug one of them and measuer the AC voltage on the plug. That will tell you if the IAC is bad or the ECM. I'll have to check my schematics in the morning for the pinout. Basically, if the voltage changes when the car is put in gear (loaded) then the IAC is toast. If not, ECM.  Ski

steve mac <shaolin116 at yahoo.com> wrote: I tried to get the thing to move but they do not

Bret Levandowski <skishop69 at yahoo.com> wrote: Very possible. Unfortunately, you need a special tool to command it in and out. It's been a while since I looked at a CF set up, but if you see the IAC pintle end where it contacts the seat inside the manifold/TB (the air passage) you could watch it and have someone put it in gear to see if it changes position. The only other option is to pull it, clean it, extend the pintle all the way by hand and re-install it. See what happens. Sometimes it works, sometimes not.  Ski

steve mac <shaolin116 at yahoo.com> wrote: yeah i know that all to well.  could the iac controllers be the root of my idleing problem?

Bret Levandowski <skishop69 at yahoo.com> wrote: Just a little rib jabbing. Something we started calling it years ago and it stuck. I'm on EBay entirely too much.

steve mac <shaolin116 at yahoo.com> wrote: evil eaby????? whats that about????

Bret Levandowski <skishop69 at yahoo.com> wrote: From what I've been told, and I'm no expert on CFI, is that the system operation is the same as are the connections. I believe you will have to do some wire splicing to get all the connectors to their proper locations switching to TBI. Just change the intake and get a stock 5.7l TB unit and you're in business. Should you decide to stick with the CFI, check Evil Bay. There are always a ton of those things for sale. That was a GM engineering marvel that should have gone straight to ye olde recycling bin.  Ski

steve mac <shaolin116 at yahoo.com> wrote: How hard would it be to hook up a throttle body with dual injectors? Would i be able to just take the plugs that i have now and hook everything up or am i just dreaming?  

Djfreggens at aol.com wrote: cross fire looks kewl but its like trying to run a marathon with a straw in your mouth(read no power or Tq. if you had a 10,000lb pickup truck a TPI manifold would be the  ticket(2200-4500rpm. if you want averaged over the curve power(2600-6200) try looking at a stealth ram. if you want low end heavy power look at a superram(2400-5800). if you want high end power(3400-7400) look into a tpis miniram ( junk IMO) if you wanna run vortec heads and use a factory manifold and have good overall power(2100-5900) check into the marine vortec intakes. these rpm figures are based on a typicaly 350ci or 5.7L engine. and that's unported as well. with port work the stealth ram will goto 7000rpm on a big inch small block.
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