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Topic: 1988 TC single Holset turbo 5.0/ 4R70W (Read 252234 times) previous topic - next topic

1988 TC single Holset turbo 5.0/ 4R70W

Reply #360 –
Thanks guys! 

Yesterday wasn't what I'd hoped for. I have something wrong that's keeping the car from 'catching' and running. I ran the battery down twice yesterday cranking and trying settings up and down with REQD FUEL and CRANKING SETTINGS.

Those are the only two fueling parameters to tune at this stage. I'm not quite sure what the problem is. After sleeping on it, I'm going to try to datalog the start process and take a video to show you all what it's doing.

I THINK it might be either a bad EDIS module, loss of VR signal, or a Megasquirt issue.

I've gone over the software setup many times, checked for spark at both coilpacks, checked the firing order and plug wire connections.

I'm hoping the datalog points to something because I'm a bit puzzled right now.

1988 TC single Holset turbo 5.0/ 4R70W

Reply #361 –
YouTube video:
Video Preview Image



PW2 isn't an issue. That's only for dual table. All header tubes have heat in them, so it's getting fuel and spark to all.


 It just won't stay running.

1988 TC single Holset turbo 5.0/ 4R70W

Reply #362 –
I can't find anything wrong. I need to pull the upper intake to explore a fuel leak, so I'll check the valve lash. Maybe the valves are too tight.

1988 TC single Holset turbo 5.0/ 4R70W

Reply #363 –
To me it sounds like your losing spark when you let of the key?
[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 #364 –
Quote from: thewestie;358544
To me it sounds like your losing spark when you let of the key?

 Thats what it sounded like to me too .
Fox-less at the moment

1988 TC single Holset turbo 5.0/ 4R70W

Reply #365 –
In that video, yes it sounds like it. At times it will run for a few seconds afterwards before it stalls.

I yanked the upper and fixed the fuel leak, and got a new oil pressure sender to fix the oil leak. Pulled all the plugs out.

4,7,8,1 and 6 were black, sooty, and fouled looking.

2, 3, 5 looked like they were perfect, or maybe hadn't even seen fuel.

2, 3, 5, and 7 are on the same injector bank. 6, 8, 1, and 4 on the other.

The worst news is that there is a lot of frothy oil coming from the turbo. Signs of a bad seal I think. We'll see on that. I do have a restrictor fitting to put in the oil feed to the turbo.

I tested continuity on the injector connectors. Checked out fine.

Something is wrong, I just don't know what yet. I'll not be happy until I check the valve lash. I've about had it for today.

EDIT

I intend to pick up a noid light to test the injector harness and see if MS is outputting to the injectors properly. I also want to see why the idle valve doesn't seem to be operating.

1988 TC single Holset turbo 5.0/ 4R70W

Reply #366 –
Quote from: flylear45;358555
In that video, yes it sounds like it. At times it will run for a few seconds afterwards before it stalls.

I yanked the upper and fixed the fuel leak, and got a new oil pressure sender to fix the oil leak. Pulled all the plugs out.

4,7,8,1 and 6 were black, sooty, and fouled looking.

2, 3, 5 looked like they were perfect, or maybe hadn't even seen fuel.

2, 3, 5, and 7 are on the same injector bank. 6, 8, 1, and 4 on the other.

The worst news is that there is a lot of frothy oil coming from the turbo. Signs of a bad seal I think. We'll see on that. I do have a restrictor fitting to put in the oil feed to the turbo.

I tested continuity on the injector connectors. Checked out fine.

Something is wrong, I just don't know what yet. I'll not be happy until I check the valve lash. I've about had it for today.

EDIT

I intend to pick up a noid light to test the injector harness and see if MS is outputting to the injectors properly. I also want to see why the idle valve doesn't seem to be operating.



it sounded like it fired on the first two trys the fuel table might be to fat on the start cycle did you try and start the car with the throttle wide open and feather the throttle to see if you can keep it running


my cougar had a hard time to continue running on the first start up. had a fat tune for the blower and the victor Jr intake..

Nick
Quote
there's only about a half a dozen man made objects that are herd by the human ear below 40Hz,a pipe organ,thunder,the space shuttle lifting off,a jet airplane taking off or landing,a large canon,an atomic bomb ignited in your back yard and the heat wave afterward oh wait you would be dead so you would'nt hear it scratch that!,and maybe beating your hear against a wall less then 40 times a second..rap music is'nt one of them!thats 40-60Hz@100+db the moving air is under 40Hz
 

1988 TC single Holset turbo 5.0/ 4R70W

Reply #367 –
oh one other question when you wired the ignition circuit did you make sure it was tied into the ignition circuit that is still powered when in start position.. there are two ignition circuits. one is power with ignition on and off while in start position and the other is power with ignition on and on while in start position.. i figured you would know this but might have overlooked it

Nick
Quote
there's only about a half a dozen man made objects that are herd by the human ear below 40Hz,a pipe organ,thunder,the space shuttle lifting off,a jet airplane taking off or landing,a large canon,an atomic bomb ignited in your back yard and the heat wave afterward oh wait you would be dead so you would'nt hear it scratch that!,and maybe beating your hear against a wall less then 40 times a second..rap music is'nt one of them!thats 40-60Hz@100+db the moving air is under 40Hz

1988 TC single Holset turbo 5.0/ 4R70W

Reply #368 –
How about timing?
88 Cougar LS 5.0 .030 over, ported E7s with GT40 valves & trickflow springs, Proform roller rockers, HO cam, removed air silencer, K&N filter, smog pump delete, 2.25" dual flowmasters, Pacestter H-pipe & headers, HO computer, 65mm TB, Explorer intake, 19# injecters, 3.45s, rebuilt posi, and TCI shift kit.

1988 TC single Holset turbo 5.0/ 4R70W

Reply #369 –
Quote from: Blown306Cougar;358559
it sounded like it fired on the first two trys the fuel table might be to fat on the start cycle did you try and start the car with the throttle wide open and feather the throttle to see if you can keep it running


my cougar had a hard time to continue running on the first start up. had a fat tune for the blower and the victor Jr intake..

Nick

Actually it seems to only be running on puddled fuel from the start prime. That after looking at the datalogs and lots of tries. I tried it the way you suggest.
 
Quote from: Blown306Cougar;358562
oh one other question when you wired the ignition circuit did you make sure it was tied into the ignition circuit that is still powered when in start position.. there are two ignition circuits. one is power with ignition on and off while in start position and the other is power with ignition on and on while in start position.. i figured you would know this but might have overlooked it

Nick

Yeah, I'm coming off the Gr/R wire from the ignition, and I tested it and MS power with a test light while cranking and in run. It's powered during both.
 
Quote from: Bruce M;358571
How about timing?

I checked the cam timing before I put on the front cover. I could have the lash too tight, though.
I'm going to test the injector electrics with a noid light first thing, and do a compression test. If the readings are low, then I'll be re-setting the valve lash.

As far as ignition timing, it is set in a fixed spot by the location of the VR sensor to the toothed crank wheel. If the EDIS control module is bad it could throw off the timing, though. MS sends it's signal to the EDIS and EDIS does the timing from there. I have a new (used) EDIS coming soon from Ebay. If the compression is good I will suspect it is (part of) the problem.

1988 TC single Holset turbo 5.0/ 4R70W

Reply #370 –
I dont think it would start if the valves were tight. When yours started it sounded good while it ran. I didnt hear a miss.
88 Cougar LS 5.0 .030 over, ported E7s with GT40 valves & trickflow springs, Proform roller rockers, HO cam, removed air silencer, K&N filter, smog pump delete, 2.25" dual flowmasters, Pacestter H-pipe & headers, HO computer, 65mm TB, Explorer intake, 19# injecters, 3.45s, rebuilt posi, and TCI shift kit.

1988 TC single Holset turbo 5.0/ 4R70W

Reply #371 –
I havent been around for a wile but its nice to see your coming along with this and hope the little bugs dont keep you down to much.

1988 TC single Holset turbo 5.0/ 4R70W

Reply #372 –
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.
Long live the 4-eyes!  - '83 Tbird Turbo - '85 Marquis LTS - '86 LTD Wagon

1988 TC single Holset turbo 5.0/ 4R70W

Reply #373 –
Quote from: Bruce M;358585
I dont think it would start if the valves were tight. When yours started it sounded good while it ran. I didnt hear a miss.

 

It didn't stay running long in the vid, but you can hear it chugging and it sounds like it was running on 4 or 5 cylinders when it does.

1988 TC single Holset turbo 5.0/ 4R70W

Reply #374 –
Quote from: SirChirpAlot;358589
I havent been around for a wile but its nice to see your coming along with this and hope the little bugs dont keep you down to much.

 
Thanks, man. It's coming, just more bugs than I expected. It's still fun, though. I know I'll get it worked out in the end. Hopefully I'll find enough time this week to get it running so I can start on paint next weekend. Hard to say for sure at this point, though.