2.7 x-faktory PMO EFI Upgrade.

[rwest]

My second request for Dennis (he’s a wiring genius and always a pleasure to work with) was to make me another relay socket with foot long leads, so instead of mounting a Bosch relay to the small amount of real estate I have on the rear relay panel, I can use the space available on the panel for relays- I have 5 holes and only one factory relay.

This relay is the one that gets switched on by ignition to power up the EFI and EDIS systems by a bigger gauge of wire.

[BCLi]

Originally Posted by rwest

My second request for Dennis (he’s a wiring genius and always a pleasure to work with) was to make me another relay socket with foot long leads, so instead of mounting a Bosch relay to the small amount of real estate I have on the rear relay panel, I can use the space available on the panel for relays- I have 5 holes and only one factory relay.

This relay is the one that gets switched on by ignition to power up the EFI and EDIS systems by a bigger gauge of wire.

Fantastic, Rutager! I need to do something similar for the relays and am working with Al on this.

Bert

[al lkosmal]

Bert, I plan to supply a nice relay that can be used to provide the proper signal to your stock fuel pump relay. It will require you to do some installation and wiring. You might want to talk to Dennis and see what he is supplying too. It sounds like Dennis is using the stock type relay socket....so if you have an available relay socket hole in your panel...it may be a tidier install for you. I'll ship you this relay and instructions on monday, but check out the alternative too.

regards,
al

regards,
al

[rwest]

Been doing a lot of thinking and planning without a lot of wrenching, but I feel like I’m solving my little issues.

One of my big goals for this project is reliability, so I spent a bit of time sourcing brass fittings and in doing so realized that I could couple my IAC directly to the vacuum manifold by using a 1/4” to 3/8” NPT fitting. This will eliminate one hose and one fitting as well as solve where to mount the IAC.

I don’t deal with pipe fittings much and man are they confusing as the internal is what they measure from, so the fittings look huge compared to what they are listed as.

[al lkosmal]

Rutager,
I recently bought one of the FAST IAC valves. this is a GM style IAC valve in a machined assembly that includes the filter. It is a 4-wire stepper and I got it working pretty well in very little time......using a MS2,3.57.....



This unit, just by luck, threads directly onto the RHD vacuum manifold that I supply.....very tidy install and works well.....I'll post a pic, once the wiring, etc. is finished.

regards,
al

PS: the unit i received is all black...no shiny valve body on mine.....

[rwest]

Looks interesting Al,

Simpler is better!

[BCLi]

Originally Posted by al lkosmal

Bert, I plan to supply a nice relay that can be used to provide the proper signal to your stock fuel pump relay. It will require you to do some installation and wiring. You might want to talk to Dennis and see what he is supplying too. It sounds like Dennis is using the stock type relay socket....so if you have an available relay socket hole in your panel...it may be a tidier install for you. I'll ship you this relay and instructions on monday, but check out the alternative too.

regards,
al

regards,
al

Thanks Al. Have communicated with Dennis, and he's wanting to see how Rutager's set up works first. Much appreciated.

[rwest]

Originally Posted by BCLi

Thanks Al. Have communicated with Dennis, and he's wanting to see how Rutager's set up works first. Much appreciated.

Hi Bert,

I plan on testing the adapter out quickly once it arrives as I know it would be useful to many people.

Rutager

[BCLi]

Originally Posted by rwest

Hi Bert,

I plan on testing the adapter out quickly once it arrives as I know it would be useful to many people.

Rutager

Thanks so much Rutager. I hope it works out for you and the rest of us. Collective wisdom is a great thing!
Best,
Bert

[rwest]

The new harness socket for supplying power to the EFI and ignition as well as the fuel relay adapter arrived yesterday and I took the week off for tinkering on the car and around the house, so that’s what I did!

The new harness fits in my new relay panel nicely and will help with a factory appearance and by using the factory relay, I can always swap in the one from the horn or fog lights in an emergency.

[rwest]

The fuel pump relay adapter was an idea so I could adapt the current factory wiring to work in a fashion that the ECU wants. Dennis made me up a custom harness and my tests proved that power would go to the pump when the Megasquirt ECU supplied ground and more importantly wouldn’t power the pump when it shouldn’t!

It is going to be a bit interesting to run the wires in the relay panel to mount the socket in an open space- appears that the panel may unbolt at the top giving me some extra room to work.

Also need to figure out a way to label so when my forgetful mind works on it down the road or the next owner or shop finds themselves digging into it.

[rwest]

What the...

While cranking over the engine to verify pump operation in the start position I got two backfires?????

...on a engine that physically has no ignition or fuel injectors!

A bit of detective work finally figured out that my masking tape over the intake to stop junk from falling in was stuck well enough that it ripped loudly- whew, I don’t need anymore evidence that I might be going insane.

Just need to remember to put engine back on TDC at cylinder #1 before starting the tune later- good to circulate some oil though.

[BCLi]

Pretty exciting update, Rutager! Glad to see you have been able to get more stuff done. And you're right - documenting the changes is a really good thing to think about now, rather than as the memories fade after driving the car for a bit!

[rwest]

Did a bit of wiggling and wrangling and got the socket in the spot next to the original relay- 2nd pump relay location for the turbos.

[BCLi]

Rutager, which IAC did you go with? I noted the one Al did recommend. Did you decide to put a Y in to get vacuum to the brake boost? Been talking with both Al and Dennis, and given the cold-to-me climate of CO, the better part of valor might be to put one in now rather than later for the very reason you note. Thanks,
Bert

[rwest]

Hi Bert,

After some questions and answers from Al, I opted to stay with the original one he supplied, but instead of extra hoses, I found a brass fitting that allowed me to screw It directly into the vacuum manifold. I like that it is from a Jeep, so likely easy to source if a replacement is ever needed. There was a real cool all in one manifold IAC unit, but it used a BMW part and also needed an resistor wired inline too.

[rwest]

Brake booster- I got the PMO units and they have a port on the intake manifold just for the brake booster, so good to go!

[chrisbalich]

Originally Posted by rwest

Brake booster- I got the PMO units and they have a port on the intake manifold just for the brake booster, so good to go!

I have this setup with my Triumph ITBs and I hate it. It works just fine. But in my head, it's weird to pull all the vac from one cylinder instead of a little from all 6.
It's on my list of things to change this year...when I add an IACV.

[BCLi]

Thanks Rutager. I don't have the same vacuum manifold as you do, but I think going down this route is the best approach. I did discuss this with Al and Dennis, and they were quite helpful in their thoughts as well. I don't have the PMOs so will need to tap the vacuum manifold either directly or via a Y-connector to go this route.
Does the Jeep IAC run off 12v dc?
Regards,
Bert

Originally Posted by rwest

Hi Bert,

After some questions and answers from Al, I opted to stay with the original one he supplied, but instead of extra hoses, I found a brass fitting that allowed me to screw It directly into the vacuum manifold. I like that it is from a Jeep, so likely easy to source if a replacement is ever needed. There was a real cool all in one manifold IAC unit, but it used a BMW part and also needed an resistor wired inline too.

[rwest]

Hi Bert,

Sorry I didn’t answer your question about the Jeep IAC, because I don’t know... if I read it correctly and hopefully Al or someone who is familiar with the MS ECU can verify that it gets hooked up directly to the ECU and uses whatever voltage comes out of the box.

Just like most of us, we have too much going on and not enough time, but I found a bit of time last week and this weekend to continue fab work on three custom mounts that I hope to get to the anodizer early this week.

Even used the old rub trick from grade school- hold paper against an object and then use the side of the pencil lead to get the impression of where edges and bolt holes are so I can drill properly.