performance intake manifold

[deevergote]

Yes, you will need to replace your PT3 with the PT6.
You CAN use an auto ECU, but it may give some minor issues. Best to find a manual ECU.

[tabaccord19]

Yes, you will need to replace your PT3 with the PT6.
You CAN use an auto ECU, but it may give some minor issues. Best to find a manual ECU.

Okay thankyou sounds like I have all the information needed. If I need more help I will make a new thread explaining exactly what the problem is. Thanks again to everyone.

[deevergote]

I've never done the wiring myself, so I can't help much there. I know there's at least one thread that goes into detail on it... but you'll have to search for it. In the worst case, get everything set up and post pictures of the areas you're stuck on. It's a common enough thing that help will come quickly.

[tabaccord19]

I've never done the wiring myself, so I can't help much there. I know there's at least one thread that goes into detail on it... but you'll have to search for it. In the worst case, get everything set up and post pictures of the areas you're stuck on. It's a common enough thing that help will come quickly.

Okay. Will do. I found on another forum that you can change the auto ECU to a manual by taking out the resistors on certain spots and putting a jumper wire. Have you heard of that working?

[deevergote]

I don't know the details, but I'm sure it can be done. Many things can be done to Honda ECUs, including converting one model to another (such as changing a P06 to a P28).

[cloudasc]

Okay. Will do. I found on another forum that you can change the auto ECU to a manual by taking out the resistors on certain spots and putting a jumper wire. Have you heard of that working?

Yes it is possible to do automatic to manual conversions, but it isn't just as simple as removing/moving resistors/jumper wire, the actual program on the chip itself needs to be changed too, otherwise you end up with a couple other issues. You should check the links in my signature, as it is possible to convert pt3's to pt6's and do automatic to manual ecu conversions.

[deevergote]

With the abundance of CBs on the road (and in the junkyards), it'd be far more effort to convert an auto ECU than it would be to just locate a manual one.

[cloudasc]

With the abundance of CBs on the road (and in the junkyards), it'd be far more effort to convert an auto ECU than it would be to just locate a manual one.

Sadly the junkyards are not what they once were, there have already been alot of cb's that have compacted , the cars that came with pt6's are considerably scarcer, I know 3 years ago I had some trouble even finding an accord with a f22a6, then the added complexities of finding one thats manual, as there are plenty of autos to go around. I know that isn't the case everywhere, and results do vary, these cars are 20 or more years old, and alot of them have been visited by Mayhem.

For someone with the experience and equipment to de/solder electronic components, it shouldn't take more then a half hour to convert an ecu (pt3 to pt6, or auto to manual), and the required component cost is less than $10 depending upon whom/how they are aquired; which overall cost with time/effort should be less then trying to find, pay, and get a ecu as specific as a manual pt6, legally that is. This at least is my perspective on the matter, based upon personal observations, and experience. Other views are always welcome.

[Jarrett]

Tabaccord19, when I get home I'll take pictures of the process.

[Jarrett]

Alrighty, here we go. If this doesn't get rep, I don't know what will.

You want plugs from an OBD-1 ECU like this P28.


Take out one of the connectors from the socket. I chose to take out connector A since that's where we'll putting the pin in the existing harness. Not necessary though.


Pop open the locking tab on the connector. I did not have my precision flathead so I opened it with a larger flathead and that's why it's got broken tabs. This is not an issue on the donor pigtail, but take much more care on the existing connector in the car.


Remove one of the pins from the connector. You want one of the smaller ones and not one of the larger ones that are on the ends of the connector. If this part gets too tedious for you, keep trying. I sucked at it up until a week or so ago and then coupes explained it a bit better. Now I'm practically an expert. Weird.



This is what the pin lead should look like once it's removed.


Cut it off about this long.


Then strip that. Don't use your teeth. That metal hurts.


Pretend the wire in this picture is a long piece of wire that you'll be routing through the firewall to the black box under the intake. I'll update it when I read the color that the F22A6 uses for those like me who care.


Twist the two sections of exposed copper together to form a solid wire. Then you're going to want to solder that connection. If you can, put some heat shrink tubing over that wire first. It's super cheap at Harbor Freight and way better at sealing than electrical tape. Don't be cheap. I won't be soldering it for the pictures but you get the point.


Open the locking tab on connector A in the car to expose the channel for A17. Slide your new pin into place until you hear it click. That sound is the pin seating itself securely.


Close the locking tab and insert into the ECU. It might be a decent idea at this point to go ahead and secure the ECU to the floorboard again and zip tie the wire to the bundle for connector A. That way when you thread it through the firewall you'll know exactly the length you need. Let me know if you need any more help.

[tabaccord19]

Yes it is possible to do automatic to manual conversions, but it isn't just as simple as removing/moving resistors/jumper wire, the actual program on the chip itself needs to be changed too, otherwise you end up with a couple other issues. You should check the links in my signature, as it is possible to convert pt3's to pt6's and do automatic to manual ecu conversions.

I was looking at the two kits on the page but I don't really see much difference. I am not positive that I will find a manual EX in a junk yard around here I have one of the very few manual CB7s and well I have only seen one other that someone was working on. Would it just be better to convert my PT3 to a PT6. Or switch a PT6 auto to a manual?

Also thanks for the pictures Jarrett. Those will come in handy once I start the wiring.

I have a PT6 ECU now and just checking to see if it an auto or manual. the code after PT6-A50. anyone know

[cloudasc]

I was looking at the two kits on the page but I don't really see much difference. I am not positive that I will find a manual EX in a junk yard around here I have one of the very few manual CB7s and well I have only seen one other that someone was working on. Would it just be better to convert my PT3 to a PT6. Or switch a PT6 auto to a manual?

Also thanks for the pictures Jarrett. Those will come in handy once I start the wiring.

I have a PT6 ECU now and just checking to see if it an auto or manual. the code after PT6-A50. anyone know

^^ That would be an Automatic PT6. Technically it would be easiest to convert the PT6 to manual, as you wouldn't need to to add the components for the IAB's.

The AMD "chip kit" is meant as a one time programming option, otherwise if you plan on "tuning" the ecu, you would use the SST "chip kit". The only difference between the two is how the chip is erased, amd = uv, sst = electronic.

[Cb_JoeyG]

Good info here, Rep'ped for a nice instuctional post

I really need to wire up my IABs i can tell i lose alof of power because of the way mines hooked to vacuum.

If your going to do this i suggest doing it the correct way and wireing it up for best power

[tabaccord19]

^^ That would be an Automatic PT6. Technically it would be easiest to convert the PT6 to manual, as you wouldn't need to to add the components for the IAB's.

The AMD "chip kit" is meant as a one time programming option, otherwise if you plan on "tuning" the ecu, you would use the SST "chip kit". The only difference between the two is how the chip is erased, amd = uv, sst = electronic.

Which kit should I get for switching the PT6 Auto to manual. There are a lot of different options in the link from the banner and well I don't know about the ECU stuff so naming the particular kit would be great.

[cloudasc]

Which kit should I get for switching the PT6 Auto to manual. There are a lot of different options in the link from the banner and well I don't know about the ECU stuff so naming the particular kit would be great.

The name of the kit for your application from pt-tuner.com would be the AMD 27C512 EPROM + 28 PIN DIP COMBO, then before clicking add to cart, select PT6 Manual from the drop down list.

I looked at some pictures of the same model ecu you posted earlier, and the only other thing you may have to aquire in order to convert it is one 4.7K Ohms resistor for spot R57.

It should be as easy as moving the jumper (single black line) resistor from number 3 to number 2, and moving R54 to R56, but you may have to add the resistor I mentioned to R57, then you remove the existing 28 pin chip from the board, solder in the dip socket, then insert the chip provided into the socket, and it should behave exactly like a manual. This would physically make it the same as an PT6-A11 except the component group next to the IC10 marking on the board would still be present.

If you would like to look at the various circuit boards that I have aquired images for in regards to the pt3 and pt6, feel free to take a look at the Wiki