2f Tbi

[flozano]

Hello

My name is Facundo Lozano, I live in Chile, I have an FJ60 , and I'm installing a 2F TBI.

On this moment I have a cmplete Wiring Harness, Adapter Plate, GM HEI Dist converted wit 7 pin module, GM 4.3 TBI, 1227747 ECM with reburned 2F EPROM, external fuel pump, etc.

Yesterday I try my first test en my engine, the engine was start, but only for 30 seconds and stop.
I think may be the advance is the problem, I don't know wich advance have now, but I think is about 5 or 7 °, for this momment I can't move to 0° (my GM HEI is too big). but I think tath is the problem, mi ECM guess thath 0° but I have 7°, and when the engine start the ECM advance the spark.
May be I have other problems. (I don't have VSS for this momment), and I don't have Park/Neutral to grond connected. (may be is another problem), may be I have another problem.
anyone can help me?

Here I will post some pictures of my project.

7 Pin Module

GM TBI

Adapter Plate

Distributor Conversion

My Harness

 

[Tinker]

You might look around here http://www.034efi.com/ for links & info. Not much here on "MUD" about EFI conversions.

 

[flozano]

anyone can hep me?

any idea?

 

[Landpimp]

no help sorry, but i just realized when looking at those pics.......that a carb looks DAMN simple now

 

[treerootCO]

Here is your answer:

http://www.jagsthatrun.com/V8-chapters/V8-tpi-Speed-Sensors.pdf

It must be emphasized that the VSS is used to control the idle speed when the vehicle is moving. Without the VSS, a
vehicle may have stalling problems under certain conditions. The reason an engine not equipped with a VSS may stall
is because when the ECM has the signals that indicate the engine should be idling (foot off the gas pedal, vehicle
moving less than 2 mph),
idle speed
is
closed loop
(which is not the same as the O
2
sensor running closed loop) and the
ECM will try to maintain a
programmed
idle speed. If the vehicle is moving (with a VSS) , the ECM opens the IAC
(idle air control) a programmed amount, regardless of engine speed, which is usually a position that will make the
engine idle about 50-100 rpm above the stationary
programmed
idle speed. Stalling can occur when the vehicle is in
the over-run condition (foot off the gas pedal, engine speed above the programmed idle speed) because the ECM will
close the IAC to try to lower the idle speed to the stationary
programmed
speed. During some overrun conditions, the
fully colsed IAC may not be able to open rapidly enough to prevent the engine from stalling.
Raising the minimum idle speed with the adjusting screw can eliminate stalling, but the engine will still not run optimally
without a VSS.