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Topic: 1988 TC single Holset turbo 5.0/ 4R70W (Read 270340 times) previous topic - next topic

1988 TC single Holset turbo 5.0/ 4R70W

Reply #375 –
Quote from: Chuck W;358616
One question.  Why did you choose to use the EDIS module and not just do the direct coil control? 

Not saying that has anything to do with it, but I know that as soon as it was sorted out that you could do things without that extra module, that is how most were doing it.

Good question. Way back in 2001 when I built my first Megasquirt I ordered a spare board in case I f'ed up on the assembly.  Then a buddy gave me a MS1 processor, so I had those things laying around.  I acquired other components over time to assemble this computer. Since it's a V2.2 board I can't really do the coil control. All the necessary components for that do come on the V3 and later boards.

I use the EDIS-4 module on the TR7 and it works well for me. Like you say, it has limitations if you want to do spark cut or launch control.

1988 TC single Holset turbo 5.0/ 4R70W

Reply #376 –
Ah, I found something at last! First I ohm checked the injectors. All check out at 3 ohms on the button. Power wires all good to the injectors, and continuity in the loom checked.

Then hooked an buttstuffog meter between the injector ground and 12v. No swing on injectors 2,3,5, and 7. The computer isn't grounding injector bank 2. I'll look at the MS and the flyback board to see what is going on and try it again. I'll do a quick compression test to look for tight valves before I button up the upper intake once I sort the injector issue out. This might be the problem guys.

Ta-dah!!!!

Reply #377 –
Alrighty then!

This is sooooo strange. I could not for the life of me find a single hardware problem with the Megasquirt, but it WAS acting strangely on the stim.

Compression check A-OK on all cylinders, BTW.

I re-downloaded the s19 file and re-flashed Megasquirt (again). This time I started with the .msq supplied with the 29y4 code and just made my hardware changes to it.

Checked it on the stim and it looked OK.

Then I decided to re-wire the fuel pump relay, and guys I think this was causing ALL the trouble.

I was using constant 12v to feed both 12v sides of the relay and when I'd connect the battery with the ignition off, the relay would click constantly. I THINK it was finding a ground through MS and corrupting the firmware when that happened.

I cut the pulldown 12v wire and ran it up to the fuse panel that supplies SWITCHED 12v to everything else, and the clicking was gone.

Checked that MS was grounding all injectors and that problem was gone. Bolted her back together and .............
 
I'll post a link to a vid of the results. :popcorn:

1988 TC single Holset turbo 5.0/ 4R70W

Reply #378 –
I'll wait right here:drink:
Fox-less at the moment

1988 TC single Holset turbo 5.0/ 4R70W

Reply #380 –
Cool, glad you at least found a direction.  Sounds like a good lead.

On the direct control with the V2.2 board, they actually do have a procedure for the V2.2 board using some extra VB921's. That's the route I'm going on the V6 in the Scorpio.  It does have a V3.0 board, but there are also directions for building the same set up on the V2.2. It would take 4 VB921's for the V8 (wasted spark).

Anyway, just an FYI.
Long live the 4-eyes!  - '83 Tbird Turbo - '85 Marquis LTS - '86 LTD Wagon

1988 TC single Holset turbo 5.0/ 4R70W

Reply #381 –
Quote from: Chuck W;358647
Cool, glad you at least found a direction.  Sounds like a good lead.

On the direct control with the V2.2 board, they actually do have a procedure for the V2.2 board using some extra VB921's. That's the route I'm going on the V6 in the Scorpio.  It does have a V3.0 board, but there are also directions for building the same set up on the V2.2. It would take 4 VB921's for the V8 (wasted spark).

Anyway, just an FYI.

 

Thanks, I wasn't aware of that option for the 2.2 board.

Yes, the lead was a good one!

1988 TC single Holset turbo 5.0/ 4R70W

Reply #382 –
Awesome , congrats man
Fox-less at the moment

1988 TC single Holset turbo 5.0/ 4R70W

Reply #383 –
Awesome Dude.I'm wicked impresses at you trouble shooting skills and the patience to follow through. After watching you I know my speedo will work again well if I ever get it back in the car?

Happy Easter to you and yours and everyone here.
[SIGPIC][/SIGPIC]:ford:87 Turbo Coupe through the floor sub frame connectors, 5.8 swap Ford racing heads Harland sharp 1.6 rockers BBK shorty swap headers 2 1/2 BBk X pipe magnaflow ler's. Megasquirt 2 with 36lbs injectors on hurricane intake with 4150 throttle body.Tremec TKO 600 Quicktime blowsheild spec stage 3 clutch. 3.73 gears and still not done

1988 TC single Holset turbo 5.0/ 4R70W

Reply #384 –
Quote from: flylear45;358648
Thanks, I wasn't aware of that option for the 2.2 board.

Yes, the lead was a good one!


Heh, I must've been typing REALLY slowly.  I thought I was replying to your 6:13AM post, and you guys got 2-3 posts (and a vid) in before I finished my post. :hick:

Great to see you got it sorted out and fired!
Long live the 4-eyes!  - '83 Tbird Turbo - '85 Marquis LTS - '86 LTD Wagon

1988 TC single Holset turbo 5.0/ 4R70W

Reply #385 –
Sweet:D

So what's next? try to sort out the tune and then try to run it with the turbo?
--SteveN 👍
[thread=28690]1988 Cougar V6[/thread]
2012 F-150 3.7L

1988 TC single Holset turbo 5.0/ 4R70W

Reply #386 –
Congratulations flylear!  Exciting to see the video too.  Thanks for sharing.  Will you use the automatic logging/tuning software to fine-tune the fuel tables?
 

1988 TC single Holset turbo 5.0/ 4R70W

Reply #387 –
Quote from: hypostang;358650
Awesome , congrats man


Thanks, this does feel pretty good right now.
 
Quote from: thewestie;358653
Awesome Dude.I'm wicked impresses at you trouble shooting skills and the patience to follow through. After watching you I know my speedo will work again well if I ever get it back in the car?

Happy Easter to you and yours and everyone here.


Thanks, I was sure barking up the wrong tree a couple of times here lately. I heard the relay acting up right away, and should have done something with it sooner. Live and learn.
 
Quote from: Chuck W;358660
Heh, I must've been typing REALLY slowly.  I thought I was replying to your 6:13AM post, and you guys got 2-3 posts (and a vid) in before I finished my post. :hick:

Great to see you got it sorted out and fired!


That was kinda funny. We had a couple quick hits on you, Chuck! If you and the guys were closer the beers would be on me today!
 
Quote from: sarjxxx;358669
Sweet:D

So what's next? try to sort out the tune and then try to run it with the turbo?


Thanks, Steve!

Actually the turbo is on it now. I had so much trouble getting the cold side on I just said screw it and left it on.  I ran a lot of oil through it and left the wastegate off. It seems OK except it was spewing some oil at first out the turbine exhaust. That leak seems to have settled down since I tried to start it the first time. I'm hoping it's not a bad seal and that it just needs to bed in a bit

I'm not too concerned with much tuning until I get it roadworthy. There isn't much tuning you can do without putting a load on the engine. I will try to get the idle valve working right, and fine tune the basic VE and spark tables from the generic Chevy SB tables that came loaded with the firmware.

For instance the VE table in there now only goes up to 100 kpa since it was made for a NA engine. (normal atmospheric pressure at the surface is about 93 kpa or so)  I'll want to expand the table up to 250 kpa and adjust the cells to make a smooth map. Just little junk like that to get it to match my setup better.

Plan is to get the exhaust on (minus cat until I get it tuned and the oil is gone from the exhaust), get all the gauges working, work on getting the brake system refreshed and working properly, and remove the rest of the trim, door handles, and mirrors so I can start the paint job. I'd love to get it in paint in a couple of weeks. I may take a vacation week to do that now that it is running good.
 
Quote from: The Shredder;358670
Congratulations flylear!  Exciting to see the video too.  Thanks for sharing.  Will you use the automatic logging/tuning software to fine-tune the fuel tables?


Thanks Shredder! WOOT! I couldn't wait to get the video up to show all you guys that have been following along the last couple years that I'm not a complete lunatic.

I may try using Tuner Studio on this car. I never tried it before, but guys really seem to like it. I used the auto-tune  feature in Megatune a little on the TR7, but I liked to datalog and use Megalogviewer to tweak the tables better. The new tuning software may change my mind on that.


Thanks to all for helping me get over the hump on this one. I really feel like it's gonna be much simpler from here.

1988 TC single Holset turbo 5.0/ 4R70W

Reply #388 –
Ran it as few more minutes today. It's making huge billowing clouds of oil smoke. sigh.

I am running out of hope that the turbo seal will start to do it's job.

1988 TC single Holset turbo 5.0/ 4R70W

Reply #389 –
Just when hope is almost gone for the turbo. I got it.

Fixed two issues.

First of all, the oil smoke was just unbelievable. It looked like the garage was on fire last night. All coming from oil burning on the inside of the hot exhaust as it exited the turbo.

I did two things. First I pulled the oil feed line to the turbo and carefully blew compressed air through it, hoping there was some debris interfering with the oil discharge. When I did, I noticed a major restriction to ANY air escaping the crankcase.

Got me thinking that I haven't made up a fill tube breather line yet, so I cracked the oil fill cap a few turns and ran the engine again. After the residual oil burned off, I was back in business! Crankcase pressure was stopping oil from draining back from the turbo and causing it to get past the seal.

Next was a severe intake leak. I could not idle the car down under 1700 rpm's and it was obvious I was trying to tune around extra air. I knew the IAC wasn't buzzing, so I yanked it and sure enough it was passing a LOT of air. Totally FUBAR.

Until I get a new one it is just gasketed off.

Car idles great and is taking throttle like a champ.

Now to get on the gauges and brakes, and get the dash stuff all finalized. I'm still fighting a wee bit of an oil leak around the Harbor Freight oil tee. I may end up ditching it for a brass tee.