My efi project

[JBz]

Im roughing out my efi project and will post pictures. Right now im stumped on the idle air control valve. Its a ford part f2dz-9f715-c. This is the second one I purchased. I thought the first one was defective but the 2nd one is the same. The little valve is always partially open and when I put voltage to the wires it clicks and moves a tad towards the open side but it is already partially open. ist I applied 12volt 1 amp to the wires hopefully to get the valve to close all the way. then 8 amp 12 volt same thing. Just touched off the wires. Im stumped on this. Idont think its a steper motor as it has 2 wires but may be it is . Can someone gimme some insight on this .Is it supposed to close on engine vacuum. Here is another one on ebay and you can see in the pictures the valve in the right hole is partially open..Thanks jb



http://www.ebay.com/itm/231101364460?_t ... EBIDX%3AIT

[fish]

perhaps you need to ground the housing?
check for ohms between the wires and the housing?

[Casper]

fish might be onto something. Maybe check in the Ford technical world for info on that P/N. Would love to see more pictures when you get the chance.

[fish]

JBz
don't get stopped by IAC. It is not really needed anyway.
IAC is ony for cold start (can be compensated for with pulse width) and air conditioning loads.
Forget the IAC & move on with the project.
BTW I agree with the shirtless canuk.. more photos & tell us the story please!

[JBz]

Upon further reading im going to go a different way on the idle air control. Im going to use the SDS type. The valve says 8psi max vacuum. Not sure if that is something to worry about???????????? Ive had this one boxed up and on the shelf for over 20 years. Microsquirt doesn't handle a stepper iac JUST A PWM OR ON OFF. Im oldschool blow through or draw thru turbos before the days of efi but slowly getting the lingo down . JB

[JBz]

The engine is a 85 ltd. mileage unknown but Dave thought about 58,000. Though It had most of the injection systym I opted for a bare intake ive had for a while. Ive ben contemplating this and with Socrace post on his I finally bit. Starting off it had no TPS. I used the online link for a replacement but dd it a bit differently. I used a heavy spade mounted on the left ear and soldered in some 14 gauge solid house wire and bent it slightly to the right. Then it got trimmed to fit the TPS. this gave me just enough clearance not to fiddle with the connector I got from picknpull. I was able to set it at 4.97 volts. The finished unit doesn't look anything like the aftermarket Honda TPS as a lot of trimming is invovled.........JB


http://pnplace.com/gl1200/tps/LTD-SEi_T ... 080603.pdf

[irishcarbomb]

Cool! Not sure what ecu youre planning but most tuning software will let you calibrate the TPS (and other sensors for that matter). Throttle closed...click set lower. Throttle open...click set upper. Done.

I was even able to use the stock temp sensor since the FSM has the resistance levels for certain temps.

[JBz]

Cool! Not sure what ecu youre planning but most tuning software will let you calibrate the TPS (and other sensors for that matter). Throttle closed...click set lower. Throttle open...click set upper. Done.

I was even able to use the stock temp sensor since the FSM has the resistance levels for certain temps.

Thanks that's good to know. Im using microsquirt. The programming might be my biggest stumbling block.Not being wise to this ive already made a few mistakes. Part of learning I guess. When I get a little more done ill download Tunerstudio or something like that and study it and im sure ill be asking????????????s but for now what does FSM mean?? jb

[Casper]

I have seen the SDS unit, but did not look at the numbers. However, -8 PSI seems low, not sure on the GoldWings, but I think a typical car vacuum runs at some -20 PSI at idle at sea level, and spikes as high as -30 PSI during a deceleration?. Something to look into for both of us. At this point in time I am not sure if I will even use a IAC control valve on my system. The Jenvey's have a built-in, adjustable, manual bypass circuit for Idle Air. I think I will give that a try first. They do have provisions for an active IAC system. From what I understand the active systems are as much about producing good emission numbers as they are about producing a good idle. OEMs of course have to consider emissions as a critical factor. However, I do not think I will loose any sleep over some extra idle emissions from a one-off 4 cylinder motorcycle engine.

Cheers.

[irishcarbomb]

Cool! Not sure what ecu youre planning but most tuning software will let you calibrate the TPS (and other sensors for that matter). Throttle closed...click set lower. Throttle open...click set upper. Done.

I was even able to use the stock temp sensor since the FSM has the resistance levels for certain temps.

Thanks that's good to know. Im using microsquirt. The programming might be my biggest stumbling block.Not being wise to this ive already made a few mistakes. Part of learning I guess. When I get a little more done ill download Tunerstudio or something like that and study it and im sure ill be asking????????????s but for now what does FSM mean?? jb

Factory service manual.

Tunerstudio seems intimidating at first, but really its not that bad...lots of documentation online

[JBz]

I have seen the SDS unit, but did not look at the numbers. However, -8 PSI seems low, not sure on the GoldWings, but I think a typical car vacuum runs at some -20 PSI at idle at sea level, and spikes as high as -30 PSI during a deceleration?. Something to look into for both of us. At this point in time I am not sure if I will even use a IAC control valve on my system. The Jenvey's have a built-in, adjustable, manual bypass circuit for Idle Air. I think I will give that a try first. They do have provisions for an active IAC system. From what I understand the active systems are as much about producing good emission numbers as they are about producing a good idle. OEMs of course have to consider emissions as a critical factor. However, I do not think I will loose any sleep over some extra idle emissions from a one-off 4 cylinder motorcycle engine.

Cheers.

unfortunately I cant read the writing on the SDS fast idle valve. Appearance wise it looks exactly the same and the word CAUTION is in the same place. Can anyone read the writing. Scroll down the page to fast idle valve.Dont know why I would need a relay for that. My instructions call for a 1amp fuse and says it gets warm and that's normal. I think they must mean 8psi fuel pressure. Vacuum doesn't make sense to me. Thanks JB

http://sdsefi.com/specific.html

[Casper]

JBz. How about I drop into SDS on Monday and ask them directly about the vacuum limits on the IAC valve, and the relay. I need to talk them about my system, so I think it works out well for all concerned.

Cheers,

[sunnbobb]

oh that makes my head hurt.. you are glutton..

[JBz]

JBz. How about I drop into SDS on Monday and ask them directly about the vacuum limits on the IAC valve, and the relay. I need to talk them about my system, so I think it works out well for all concerned.

Cheers,

Sounds like a winner Casper. Thanks JB

[JBz]

oh that makes my head hurt.. you are glutton..

I know what you mean. Just trying not to overthink things and all should be well. Been there and done that too many times. THE VA doc told me I m very intelligent though jb