Zach's Carbs to Microsquirt conversion thread, 7/20/18 update Options

[Dtjaden]

Zach,
Did you check the cable and baud rate as I suggested in post 551? If these are not correct you will never connect.

[VaccaRabite]

And the verdict is...

The coms ground pin on the Microsquirt was burned. That's why I was unable to connect. The guy said once he replaced the bad pin it connected immediately. He says its a fairly common fault.

If I'm still having issues when I get it back, I'm going to pull the harness out of the car, and take the ECU, the harness, and my laptop with me to his shop when I go down to visit Scotty_B in richmond in August, since the guy's shop is about an hour further down the road.

If anyone was interested, the guy DIYAutotune sent me to to check the Microsquirt was:
Peter Florance
PFTuning.com

Zach

[crash914]

Peter is one of the good guys. Been around quite a while and very good with the MS units.

I still need to complete the new wiring on mine....soon...

[VaccaRabite]

Zach,
Did you check the cable and baud rate as I suggested in post 551? If these are not correct you will never connect.

Sorry I never replied. MY bandwidth has been severely limited lately.
The cable is legit, I tested it to make sure. It was one of the first things I checked when I was having issues connecting.

Also the COM port has been set to the correct BAUD on both laptops. The DELL D630 did have the BAUD set at 9600 initially, but that was corrected fairly early on.

I still have the three spare tester units. I can throw them in a box for you today if you want.

I got them, and have not had a chance to try them yet. With any luck, I won't need to.

Zach

[Mblizzard]

I have to send mine in to be fixed as well. But it is a resistor not a pin.

[McMark]

Wow. Did he mention if there was a reason? I should probably have you send those other units to him instead of back to me when you're done and check them all out.

[VaccaRabite]

Wow. Did he mention if there was a reason? I should probably have you send those other units to him instead of back to me when you're done and check them all out.

No, he did not speculate on a reason, he just let me know what was wrong, and that it was a common fault when the ECU was to blame for connection issues.

Zach

[VaccaRabite]

So a brief update and a little progress.

I've not touched the car in months. On Sunday I NEEDED a project to take my mind off other issues. So I built a test harness (that only had power, ground, and coms in the Ampseal. I set it up on a switch with a 2 amp fuse in the circuit. Hooked my car battery to the system for isolated power. Plugged in my laptop, ECU, powered the system on and the ECU IMMEDIATELY connected to my laptop!

So, the ECU is fixed, and my laptop (I was using the Dell with the native RS232 port) has proven good.

I'm going to do some connectivity tests on my harness again (and check them against the test harness that I know works). I'm hopeful the the RX and TX lines are just in the Ampseal backwards (which would be my fault).

Should be in business soon!

Oh, also I've been driving the car a little as is. Only a few miles at a time... Man, I really miss this car!

Zach

[crash914]

Great news! I will assist if needed. We will be in the new house next week and should be fully moved by early October. Lift will be available.

[VaccaRabite]

baby steps to progress.

Today I bit the bullet and took the harness out of the car.
Hooked it up on my kitchen table, and instantly got a connection! I literally danced a little.

Again, all that was connected was switched, fused power, ground, my battery and coms. No other sensors were hooked up.

The ampseal connector on my car's harness is CONSIDERABLY looser then the one on the test harness I made. I'm sure its from plugging and unplugging it so many times. But for the sake of being sure, I unplugged and reseated the ECU.

Power on, no connection detected.

So, I think the ampseal itself may be the issue. Or one of the COMS pins inside the ampseal needs some love. I hate taking these things apart... they are fiddly. But that is my next move. Pull the COMS pins and inspect them. I think I have another new Ampseal 35 block on hand, maybe I just replace the loose block with a new tight one.

Zach

[VaccaRabite]

Now that I am following this train of thought...
I wonder if while chasing connectivity while the ECU had the blown COMS ground, I probed too aggressively and expanded a female COMS pin in the Apmseal block so that it no longer has a good mechanical connection to the male pin on the ECU?

Just another thing to test...
Zach

[VaccaRabite]

Its incredible how this drags.

I had sent the harness back to Mark to have him re-wire the Ampseal. Which he did. As soon as it got back, I hooked it up and have been happily communicating with my laptop.

In January I wired in an AAR, but have not had a chance to test it yet.

Last weekend I put the harness back in my car. Well most of it. Weather went from 70 to 40 in about an hour and I ended up getting sick. :-(
This weekend I'm hopeful to finish the wiring.

We still have salt on the roads here, and the forecast is for several more inches of Snow Saturday (WTF! - I've never had snow this late in the spring.)

I finally bought a 2 port fuel pump and will be simplifying the plumbing under the tank. Hopefully this will resolve the issue I was having with fuel pressure decreasing under load.

I know I can't make Hershey this year. So that pressure is off. But i still want to drive this car. And I have motivation right now from the trip to Amelia Island. So lets make use of it.

Zach

[crash914]

get yours done and I will finish mine...lets go for a ride!

[Porschef]

We still have salt on the roads here, and the forecast is for several more inches of Snow Saturday (WTF! - I've never had snow this late in the spring.)



Zach

Yeah, this is crazy weather. Still salt here also, so I'm not taking the car out.

Haven't started it since October... (IMG:style_emoticons/default/dry.gif) (IMG:style_emoticons/default/icon8.gif)

[VaccaRabite]

get yours done and I will finish mine...lets go for a ride!

Hell yes.


Zach

[VaccaRabite]

Fuel pump arrived this weekend. But, well, life. I've been stupid busy. Being sick as a dog for a week didn't help, and working 7 days a week.

Damn, this month has flown by! I'm so close. I need to make time and finish this thing!


Zach

[bulitt]

(IMG:style_emoticons/default/smilie_pokal.gif)

Like eating an Elephant. However some Elephants are bigger than others... (IMG:style_emoticons/default/blink.gif)

[Mblizzard]

While it is frustrating when you don't have time to work on things, I think it is worse when you have time but lack the part or have to spend lots of time on a minor issue that should take 5-min and then turns in to a Mongolian cluster F&*k and steals all of your time.


Hang in there. You will likely still beat me back on the road.

[VaccaRabite]

Been working on the car in little bites.

The gas tank is epoxy sealed with the Caswell kit.

The new pump is in place and wired in. No fuel lines are run to it yet.

I’ve bent up a hard fuel line to make that tight 180 turn after the fuel pump. Tired of fighting kinks.

The harness is back fully in the car, including the AAR valve wiring.

The AAR is wired, but the hose barbs are HUGE compared to what I need. I will either need to make fittings to step the hoses down, or replace the AAR with one using the same size hoses.

I’m close to starting the car again. Maybe this weekend. Won’t have a working AAR yet, but should be able to get the engine running again.

God all this takes me so long.

Zach

[McMark]

I looked back but couldn't find any info in this thread about your AAR, but if the one I was working on will work I can send you my adapter piece and you'll have to order a Hyundai valve.
http://www.914world.com/bbs2/index.php?showtopic=319149

(IMG:http://www.914world.com/bbs2/uploads/post-419-1509652659_thumb.jpg)