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Old 08-28-2006, 02:59 AM
Bill USN-1's Avatar
Bill USN-1 Bill USN-1 is offline
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Exclamation Initial System Setup/Must Read

I know the first thing guys want to do when hooking up their fuel injection set up is to start it up and hear it run....

Well there are a couple things that need to be done after the installation.

Note: When setting the timing for the first time you must ensure the wiring is correct on the ignition module. The 2 wires from the pickup in the distr must be connected to the proper terminal, P and N on the module. To verify they are correct:
A. Set engine to TDC compression stroke. For IH use #8 for V8s and #1 for 4 cyls. For all other makes use the correct plug.
B. Remove the cap and verify the rotor phasing is correct IAW the distr conversion thread. Rotor should be just past center of the cap terminal in the direction of rotation(clockwise for IH) and the reluctor should be lined up.
C. Connect timing light and disconnect the timing bypass connector.
D. Crank engine to check timing. If the wires are connected properly then the timing will be within 5* of 0*. Just set timing to 0 and your good. If the timing is 20-30* away then swap the P and N wires and check again.
When the distr is set, lock it down and do not move it for any reason Until you perform timing below.


1. Timing- There are 2 ways to do this.
a. disconnect the bypass wire and set timing to 0° at idle when warm. procedure- warm up motor then turn off. unplug bypass. Start motor. Set timing to 0°. Turn off motor. Reconnect bypass. Unplug ECM to clear fault code.
b. leave bypass connected and set timing to the value listed for your idle rpm and MAP setting at idle, based on your specific BCC-broadcast code. You can look up most BCC files in the speadsheet attached in the parts required faq. Procedure-start motor and warm up. Set timing to the value listed in the spark table.


2. IAC reset/min idle speed- This sets the throttle plate on the throttle body to a specific rpm. I recommend about 500 rpm for most engines. A little common sense goes a long way. Obviously a cold engine will not properly idle when you disconnect the idle control. So ensure your engine is up to temp prior to setting the min idle speed.
Procedures- Go to sheet 7 of the pinout diagrams. At the top is the ALDL connector. You need to put a jumper between pins A and B of the connector. These are pins A9(wht/blk) and A12 (blk/wht) on the ECM. This puts the ECM into aldl mode. Turn the key on (not start) and the IAC should drive completely closed. You will normally hear a buzzing from the IAC. If you have the winaldl up and running on your laptop, you should see the IAC went from 145 to 0. Now unplug the IAC connector. turn the key off. Remove jumper. Start motor. If the idle is too low you may have to keep it running. On the front drivers side of the throttle body is the adjustment screw. It may be behind a silver plug. If so just use a nail or punch to poke it and remove it. Then use a #20 torx bit to adjust the idle speed to at least 100 rpm less then your warm idle speed. if 600 then set to 500 rpm. You are looking for the lowest consistant idle your motor will do. When set, turn off motor and reconnect the IAC. I try to keep the IAC count to about 40 with the motor warm and idling. If the counts drop to 0 then the IAC can no longer adjust the idle down.

This is a good time to verify the operation of the IAC. When the jumper is in and the key is on the IAC is driven closed. So while it is idling to set min rpm put a finger over the IAC port just above the IAC. There should be no air being sucked in and you should be able to see the pintle on the IAC.
When the IAC is connected and operating there should be a small amount of air being sucked in the port at idle and should increase as you apply some throttle.

3. TPS-throttle position sensor. With the idle set, you need to now set the TPS. This need to be set to about .54V. I normally shoot for about .2% on the sensor page or dash in winaldl.
The TPS is on the passengers side and will have 2 screws holding it on. The factory TPS will not have much room in the holes for adjustments so I use a drill bit or file to elongate the holes as needed. To adjust, just loosen the screws and trist the TPS. You can monitor the voltage on Pin B of the connector with the key on or at pin C13 of the ECM. You can also see it on the sensors tab of winaldl!! Anything away from .54V will also show as a percent of throttle. Such as .2 percent or 1.7 percent...depending on how far from .54 you are. I try to keep the idle setting to within 1 percent.
This is also a good time to check your TPS. Once it is set, just watch the voltage as you open the throttle. you should see a steady rise in voltage up to about 4.5-5V at WOT-wide open throttle. If it jumps up and down or skips some then you may want to replace it.

4. Fuel pressure- The system calculates the fuel needed based on the initial settings for injector size at a specific pressure. If the pressure changes then the fuel calculations will be off. I recommend checking the feed and return line pressures at the very beginning. This can save a lot of time later. The pressure is less then 15PSI so a simple cheap gauge is all that is needed. I picked up a HF fuel inj tester for $7 on sale. Comes with a T and a short rubber hose to install it.
The feed side pressure should be about 13psi and should not change with rpm or load. The return should be near 0psi.


If you get all these items done it will make the transition much smoother!!

Good luck.
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Bill USN-1


Click a link below that meets your needs! Either DIY or let me help.

COMMITED TO HELPING PEOPLE "PROPERLY" INSTALL EFI
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Last edited by Bill USN-1; 07-07-2014 at 08:48 AM.
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  #2  
Old 12-07-2006, 09:30 PM
IHWILD IHWILD is offline
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Default Re: Initial System Setup/Must Read

Bill can you make this a sticky? I just stumbled onto
it and would think it would be nicer at the beginning but its your call.

Rich
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  #3  
Old 12-07-2006, 09:47 PM
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Bill USN-1 Bill USN-1 is offline
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Default Re: Initial System Setup/Must Read

It's listed in the FAQ already.
Have you gone down the list of subjects in the FAQs?
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  #4  
Old 12-07-2006, 09:55 PM
IHWILD IHWILD is offline
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Default Re: Initial System Setup/Must Read

Quote:
Originally Posted by Bill usn-1
It's listed in the FAQ already.
Have you gone down the list of subjects in the FAQs?

Yea I think I just need to look at the FAQs when I am more awake... I just realized I missed the initial setup because everything else was in pretty colors and I just rolled right over it without thinking it was a link. and I just realized about the install one just now too looking at it...


I still feel like I am getting in over my head lol.. I aint so worried about the installing of the parts anymore as what do I once I have it on... I am guessing that once all the inital stuff is set then its is onto logging and tuning? I havent figured out all what I would need to tune.. if I understand correctly you have to burn the chip everytime you change something? Or am I missing something that you can do without having all the extra programmers and stuff.

Rich
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  #5  
Old 12-08-2006, 07:21 PM
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Darrell Tuxworth Darrell Tuxworth is offline
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Default Re: Initial System Setup/Must Read

Hey Bill.
Wondering why you picked IAC counts at idle to be around 40?
I read somewhere..don't recall where exactly...that you don't want your IAC counts at idle to be above 20.
Since the IAC is an air leak and thus some of the air is bypassing the throttle blades and not being used to draw in and shear the fuel dropplets this made sence.
Still haven't figured why a have a drop in fuel pressure at WOT yet. Replaced pump and the prepump filter but that didn't help. Can't imagine the engine uses more fuel than the pump can supply...Got to be something before the pump and thus starving the pump but there is no blockage in the line I can find.
If you get a chance could you email me your latest BIN for your 345? I am curious how diferently/similarly we are.
Do you come back to the States this year? Gonna be at RMIHR?
Darrell
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  #6  
Old 12-09-2006, 12:12 PM
Bill USN-1's Avatar
Bill USN-1 Bill USN-1 is offline
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Default Re: Initial System Setup/Must Read

Hey Darrell I was beginning to wonder if you gave up on FI.

Here's how I picked 40.
First it's not really written anywhere.
All the GM manuals I have state the minimum idle stop screw is set at the factory and does not need adjusted unless replacing the TB. Well I think we covered that part...we changed the motor!!

If you look for specs, there really isn't a min speed given. My books state that 60 counts is too much and 0 is too little.

But it also states that the IAC directly controls the idle speed under all conditions.

Now over the years I have seen a lot of different opinions on this and the 40 counts is based on my personal experiences and feed back from those I have helped.

A lot of bins will allow you to take the IAC counts down to 0 with out a problem. But I have had some bins that will for no real reason raise the idle speed, or I should say the idle speed starts to creep up the longer it runs if the counts were too low.

Now I have not read the hacks of the different bins to see if there is a real difference i am just going by trial and error.

Something else I have seen really play havoc with the IH installation is the system voltage level.
This is really a big deal for those still running the stock scout charging system. The voltage sensed by the ECM is lower then it should be so the ECM raises the idle speed to compensate.

So I now use tunerpro to set the voltage compensation to a 1.0 value. meaning no change in rpm.

Sense I have to make the info here fit as many people as possible, I simply say to keep the IAC counts at about 40. This way there should be no problems with any bin used.

Hope this makes sense....

I have 2 bins that I flip back and forth on in my scout.
I'm not totally happy with anything so I am always playing....
I can send them for you to try. I'll have to down load them out of the romulator and the moates ecms!!

How much pressure are you dropping?
If you change the regulator pressure does the drop in pressure follow?

What if you lowered the pressure but increased the inj PW?
Do you still get as much of a loss?
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Bill USN-1


Click a link below that meets your needs! Either DIY or let me help.

COMMITED TO HELPING PEOPLE "PROPERLY" INSTALL EFI
Learn to do it right.


May be the answer to all your fuel injection needs!


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  #7  
Old 12-09-2006, 01:02 PM
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Darrell Tuxworth Darrell Tuxworth is offline
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Default Re: Initial System Setup/Must Read

I never have given up on Fi. Like you, I am never completely happy with the FI so there is always something I am messing with.
I need to pull the TB and adjust the fuel pressure/ drill hole whatever to be able to adjust the pressure on my TB since I use the Howell TB.
I have about 12 PSI under normal conditions but about 9 at WOT 4000 RPM+.
You coming back from Italy this year?
Darrell
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  #8  
Old 12-09-2006, 01:14 PM
Bill USN-1's Avatar
Bill USN-1 Bill USN-1 is offline
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Default Re: Initial System Setup/Must Read

If you count December this year...well that's next December!!
I really miss the CO trip each year...although Austria, Switzerland and Germany's alps along with the rest of Europe has really been nice!!

Still working on my next location.

9 psi is definately a pressure drop!!

I might have to hook my gauge back up just to check mine again. But All the other times i have checked it, it never dropped.

Once you move the bottom round piece of the regulator, you can just turn it with some small pliers. Like shown in the regulator FAQ.

You may want to replace your spring with the stronger one listed here if you can't get enough out of your.
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Bill USN-1


Click a link below that meets your needs! Either DIY or let me help.

COMMITED TO HELPING PEOPLE "PROPERLY" INSTALL EFI
Learn to do it right.


May be the answer to all your fuel injection needs!


WANTED-Holley Distributor
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  #9  
Old 10-18-2007, 01:27 PM
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R290 R290 is offline
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Default Re: Initial System Setup/Must Read

Attached is a Word doc that contains what Bill said all on one page for easy prinitng.
Attached Files
File Type: doc initial startup & setup.doc (49.5 KB, 705 views)
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