[Diy_efi] CFI

Sat Sep 17 16:10:35 UTC 2005

Correct. It was late and I wasn't thinking. :(

Dustin Lof <bubblesjrtwo at yahoo.com> wrote:if they are four wire iac motors then you need to
measure DC voltage across the green pair and the blue
pair

--- Bret Levandowski 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 wrote:I tried to
> get the thing to move but they do not
> 
> Bret Levandowski 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 wrote: yeah i know
> that all to well. could the iac controllers be the
> root of my idleing problem?
> 
> Bret Levandowski 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 wrote: evil
> eaby????? whats that about????
> 
> Bret Levandowski 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 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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