Webber 750 engine

Hi Doc

I think they make a fuse/relay block to go with the Microsquirt, but think that a unit from a small compact car will work fine and be less expensive.

That is if it ever warms up enough and the mud dries out so I can get in a salvage yard.

Tony
 
Last edited:
I know what you mean about the computer problems. My screen does not come on, then all of sudden its on. :der: I went to best buy to look at new screens and they told me my cable is bad not the screen. So I bought a new cable. it does not fit my computer so tonight was the first I have been back on in a while.
If Michael buys a redrive from Swiss, it will be good to see two different drives and their approach to the Weber engine. I am sure Neil will have something soon. Bensen days is approaching and I would not be surprised to see Ernie with a Weber on one of his Dominator's this year.
 
fuse box

fuse box

Hi Doc

I think they make a fuse/relay block to go with the Microsquirt, but think that a unit from a small compact car will work fine and be less expensive.

That is if it ever warms up enough and the mud dries out so I can get in a salvage yard.

Tony

I have already purchased the "HOT BOX" prior to the engine. I was going to use it with the engine I have now because I didn't like the way the wires were setup. Oh I got a Microsquirt ECU:usa2::drum:
I got the engine, cables, ECU, fusebox,

All I need now is the gearbox! and the know how. I'll wait on Neil for the gearbox.
 
Last edited:
Great going Doc, Isn't that Microsquirt something else??

Tony
 
set up shop

set up shop

Great going Doc, Isn't that Microsquirt something else??

Tony

I'm gathering as much as I can before I go to GITMO, so I can start working on the engine as soon as get there. The delivery system to GITMO is not with the speediness as one might think, plus you have seller that won't deliver to APO (military) addresses.:eek:hwell:

Doc
 
I have already purchased the "HOT BOX" prior to the engine. I was going to use it with the engine I have now because I didn't like the way the wires were setup. Oh I got a Microsquirt ECU:usa2::drum:
I got the engine, cables, ECU, fusebox,

All I need now is the gearbox! and the know how. I'll wait on Neil for the gearbox.

Doc or Tony,
Could you look in your instructions and tell me how many inputs does it give for the Idle Air Controller (stepper motor type).
 
Doc or Tony,
Could you look in your instructions and tell me how many inputs does it give for the Idle Air Controller (stepper motor type).

Mark
I read this in the microsquirt introduction page:
"No stepper IAC control: In order to make room for the dual ignition inputs and dual outputs, the ability to to control a stepper IAC was removed. PWM Idle valves, as well as on/off idle valves, can still be used.":confused:
 
HI Mark

Ditto what Doc said, I don't find any IAC on my intakes or TB's anyway, so was not concerned at the time.

Doc, that thing about not delivering to a APO may be a regulation/political thing more than a vendor thing. I remember when I was in the military and at a APO address and wanted to order a personal weapon from a major firearms manufacture, I had to order it though my CO to get it delivered to the APO.

Tony
 
Which ECU do you have

Which ECU do you have

HI Mark

Ditto what Doc said, I don't find any IAC on my intakes or TB's anyway, so was not concerned at the time.

Doc, that thing about not delivering to a APO may be a regulation/political thing more than a vendor thing. I remember when I was in the military and at a APO address and wanted to order a personal weapon from a major firearms manufacture, I had to order it though my CO to get it delivered to the APO.

Tony

Tony are both of you using the Megasquirt I, or the Megasquirt II, and are you using the 3 board or higher?
I dont think the Megasquirt I will work in NA or Turbo. I am wondering if the Megasquirt II will work without a daughter board for more sensors. The weber IAC has 6 leads, Looks like Megasquirt will work with a 4 lead unit. I don't want to start swapping out what not broke if I can keep from it. I am getting close to ordering a unit and would like to know more about it. I have not even got into the Wide band O2 sensor yet.
 
Last edited:
Hi Mark

Well now you've done it, it's panic time, I have a salvage Weber harness coming next week and I CAN NOT FIND THE INSTRUCTIONS!!!! I found the ECU but the instructions are not with it so that means they are SOMEWHERE in the house, big house !! As best I can remember when I ordered it a few months ago, I checked the website and they said it was the latest version , a number II and with the number III version board. Sorry can't help with your quesstion till I find the papers and that will take a miracle or a accident to find them quick.

Tony
 
Mark

You might try this, go to "www.DIYAutoTune.com" click on company profile , go to bottom of page and click on the "questions/info " line and that will give you a e-mail address and a phone number. The opening page on Microsquirt.com states the Microsquirt was designed primarily for bikes, snowmobiles, watercraft,ect, but can be used in cars also. I notice in the accessories they have a option for a IAC "block" for a Jeep 4.0 IAC and the connector.

Tony

PS. also a call to Randy would probably help with the IAC question on the Weber but he is not yet familiar with the Microsquirt and is following our progress with it
 
Last edited:
HI Mark

Ditto what Doc said, I don't find any IAC on my intakes or TB's anyway, so was not concerned at the time.

Doc, that thing about not delivering to a APO may be a regulation/political thing more than a vendor thing. I remember when I was in the military and at a APO address and wanted to order a personal weapon from a major firearms manufacture, I had to order it though my CO to get it delivered to the APO.

Tony

The vendors that won't deliver to APO, are vendors that only use UPS or Fedex for delivery and don't deliver with USPS.:eek:hwell:
 
Tony are both of you using the Megasquirt I, or the Megasquirt II, and are you using the 3 board or higher?
I dont think the Megasquirt I will work in NA or Turbo. I am wondering if the Megasquirt II will work without a daughter board for more sensors. The weber IAC has 6 leads, Looks like Megasquirt will work with a 4 lead unit. I don't want to start swapping out what not broke if I can keep from it. I am getting close to ordering a unit and would like to know more about it. I have not even got into the Wide band O2 sensor yet.

I don't know what version mine is, it hasn't arrive yet. But this is a serious overlook, If it doesn't work, we'll have to look for one that does work.
 
Ok Mark and Doc

I had a small(very small) memory function and went to "www.microsquirt.com" and found a whole list of specific subjects to look at and 2 of them were "air and fuel" and "air and idle", lots of info there. First, since my engine only has the throttle bodies on it and no other hardware, my question is, does the Weber use a IAC valve. Next, at the top of the subject page there is a site labled www.microsquirt.info, click on it and it takes you to the design set up of the Microsquirt and tells you what series board and model it is. It also tells you that the Microsquirt is NOT SET UP FOR A STEPPER IAC valve but will still run a PWM idle set up or a FIDLE valve set up and at the very bottom of the page tells about a Zetec Ford that was run with just the idle stop setting on the throttle .

Tony
 
Last edited:
I don't know what version mine is, it hasn't arrive yet. But this is a serious overlook, If it doesn't work, we'll have to look for one that does work.

Doc,
I was reading some of the assembly manuel and it was stating if you want a stepper motor, then jump such and such wires , if you want dual ignition jump such and such, this was during the assembly of the unit. I also saw they have daughter boards to add more inputs. I think it is because of the amount of power availble from the ECU to the sensors is limited, but the unit is capable of handling either engine with some add ons.

John volunteered to do a build and post it so others could benifit from his experience, Some of the assembly will require, knowing what sensors will be used and then what type of sensor it is.

The jeep is either a 4 wire or 6 wire step motor. I will have to look it up.

The megasquirt is a highly adaptive unit. If I can get the weber going with the stock ECU and over 1/2 of the feed backs missing. Then we should be able it get it to scream with the Megasquirt. I will probably order mine Friday.
I believe You and I have the same engine
 
Hi Mark

I read just a little about a FIDLE valve and it sounds like it is just a simple air inlet valve that maybe has a needle adjustment for a certain speed and is either open or closed, sounds like it may be controled by a solenoid valve sensing the water tempureture, The way it was described in Microsquirt info (for determination of type) was that if the engine ran a high idle and the suddenly dropped to low idle after warming up it would be a FIDLE valve but if it came down in stepps it would be a stepper valve or a PWM and a PWM had fewer wires that a stepper.

Tony
 
Hi Guys,

I've been reading too. They have at least 3 different models that are set up to make it easy for different sensors on the various engines.

We need to order the one that matches our engine's sensors as closely as possible.
Else we have to add on other 'car' manufacturers sensors and wire them to the board.

I need a list of the sensors we have on the engine and then I need to get the spec on each sensor example of things we need to know about the sensors.

1) Input polarities
2) do we have fuel injectors? If so are they low-impedance or high-impedance
3) IAC control or PWM

...and more.

The point is not having the engine or the sensors I have no way of selecting the best.

Can you guys provide me with a list and do we have any of the spec's for the sensors yet so we can select the best Microsquirt model?

I would need part # and manufacture if possible for the sensors we have on each of your engines!
 
Well John

I can only give you some second hand info. The injectors are hi impedance, the oil pressure sensors are the same, the water temp. sensor may vary in style depending on the type of intake manifold (probably same reading value) AIT may vary in style, MAP may vary in style, all of the "variables" are due to the different model of engines ,marine, snowmobile, off road, ect ect. ignition coils are the same. cam sensors are the same , crankshaft timing sensors are the same. As I recall the "critical" set ups are the timing of the injectors and the choice of ignition coil arrangement, but the instructions are very detailed and clear. If I can find my instruction book I will photo copy it and snail mail it to you (IF--- I can find it).

Randy at Watcon is trying to make up some specs for us on these very items and carry them in stock where possible. As I said earlier he is also in the process of making up "pigtail" adapters that have the correct plugs on them that can be soldered/connected to what ever harness we make up. There may be two different length or maybe one length and you cut to fit. He has no price for the kit yet but is working on that also. I think he will only sell the adapter made up rather than just a connector/plug because he has the proper tool for making the leads and does not want poor adapters made up using the wrong crimping tool, like a pair of pliers and a hammer !!

He is really bending over backwards to help us since he is really interested in this engine. It all just takes time.

Tony
 
OK, I hope you can find the instruction book that would help.

I feel the best way to approach this is to:
1) define our sensors
2) select the model

But it appears all of the models can be adapted with added cost of parts and labor.
IT may vary in style, MAP may vary in style, all of the "variables" are due to the different model of engines ,marine, snowmobile, off road, ect ect

This will make it hard to standardize.

Once we know what we have or need to add, the rest appears easy.
 
Tony,
We have the stepper motors which is a finer adj than the idle valves. I did not mean to cause so much confusion. I was concerned as the Megasquirt give us 4 pins for the IAC and the Weber uses 6. Same for the Lambda sensor. If John was going to assembly it , I saw that he would have to address it during the construction of the PC board.
It may prove very difficult to do without the Weber engine or at least the manuel.

John,
The manuel is very detailed on the engine components. Look back at the thread and Michael posted the link for the Manuel. If you think you will have a Weber some day, it would be a good 6 dollar investment for you. If not I will scan some of the needed information and send it to you when necessary. Some of the wiring may be for the instrument panel, I have not research all of it.
I feel very confidant the Megasquirt 2 with the V3 or 3.57 boards will be just dandy for this application.
 
Last edited:
Top