67 twin turbo dart

[Matts440]

A valvetrain issue won't cause electrical noise - but if it's keeping one cylinder from working normally, it could result in some of the unevenness I saw on the tooth log. The log I saw looked like all the teeth were real teeth and not noise pulses. I had a bit of a scare when my Dart dropped a cylinder on the dyno - did all sorts of tests only to find that one of the adjuster screws was no longer locking in place and had backed out.

I haven't rechecked all the adjusters on all the rockers. Might reset them to cold and see if that works. Then adjust to the warm once it runs.

 

[turbovan]

Did you replace all the plugs and wires after the issue originally started? The wrong set of either would cause significant electrical noise.

 

[Matts440]

Did you replace all the plugs and wires after the issue originally started? The wrong set of either would cause significant electrical noise.

I did replace all the plugs with the exact ones I took out. The wires I just replaced the one with the same brand and type it's just a little longer.

 

[mpgmike]

An issue I ran into was while cranking, one table was used. After it catches, a different table kicks in. I had a transition issue I had to smooth out. It's been awhile since I read through this thread, so maybe you have that covered already.

 

[Matts440]

I've been going through the program and cant really find that its changing. But did find 2 more spark plug wires that had damage, so replaced all of them with Accel ceramic coated ones. They are smaller in size compared to the taylor 10.4mm these are 9mm. But while having the valve covers off to change plugs found a intake rocker arm really loose on adjustment, nothing stripped. How often do you all check your roller rockers with a solid lift cam? Will be adding this to the list now of checks.

 

[TT5.9mag]

I've been going through the program and cant really find that its changing. But did find 2 more spark plug wires that had damage, so replaced all of them with Accel ceramic coated ones. They are smaller in size compared to the taylor 10.4mm these are 9mm. But while having the valve covers off to change plugs found an intake rocker arm really loose on adjustment, nothing stripped. How often do you all check your roller rockers with a solid lift cam? Will be adding this to the list now of checks.

Race car? Every round on turbo stuff. Drag and drive turbo stuff, after every drive and every round. Street car solids maybe every 6 months. Or on any of them if you hear ticking chem em immediately

 

[Matts440]

Race car? Every round on turbo stuff. Drag and drive turbo stuff, after every drive and every round. Street car solids maybe every 6 months. Or on any of them if you hear ticking chem em immediately

That's the thing there was no noise, could have been the misfire and not wanting to run, well atleast part of it. Good to know will have to add those tools to my pit bag.

 

[TT5.9mag]

That's the thing there was no noise, could have been the misfire and not wanting to run, well atleast part of it. Good to know will have to add those tools to my pit bag.

It sucks trying to figure out if problems are mechanical vs electrical.

 

[Matts440]

It sucks trying to figure out if problems are mechanical vs electrical.

Think mine was both unfortunately

 

[TT5.9mag]

Think mine was both unfortunately

That’ll make pull your hair out.

 

[Matts440]

That’ll make pull your hair out.

oh yeah, surprised I still have mine lol I'll get it sorted out

 

[Newbomb Turk]

oh yeah, surprised I still have mine lol I'll get it sorted out

Any updates?

 

[Matts440]

Any updates?

More issues, ordered new fuel filter due to elements still on back order, got those installed and the fpr started leaking, go to look up a rebuild and mallory no longer sell that one or ordered a aeromotive one and waiting for the fitting to get that mounted properly so it will now have equal pressure to both rails where the old set up, after doing more research was not since it was mounted to the one rail and not in the center between them. So got the new aeromotive X1 with the proper diaphragm to handle the flow of my twin pumps. It's just been my lucky time with this lol

 

[Newbomb Turk]

More issues, ordered new fuel filter due to elements still on back order, got those installed and the fpr started leaking, go to look up a rebuild and mallory no longer sell that one or ordered a aeromotive one and waiting for the fitting to get that mounted properly so it will now have equal pressure to both rails where the old set up, after doing more research was not since it was mounted to the one rail and not in the center between them. So got the new aeromotive X1 with the proper diaphragm to handle the flow of my twin pumps. It's just been my lucky time with this lol

Which Mallory regulator did you have? I have a couple of rebuild kits for one of them. Not like that will do you any good now.

MSD is just gutting the Mallory line. I detest that.

 

[mopowers]

Which Mallory regulator did you have? I have a couple of rebuild kits for one of them. Not like that will do you any good now.

MSD is just gutting the Mallory line. I detest that.

I tried finding a rebuild kit for the 3-port Mallory return style regulator. You're right - they quit making them. Kinda shitty.

 

[Newbomb Turk]

I tried finding a rebuild kit for the 3-port Mallory return style regulator. You're right - they quit making them. Kinda shitty.

Yep

 

[Matts440]

Which Mallory regulator did you have? I have a couple of rebuild kits for one of them. Not like that will do you any good now.

MSD is just gutting the Mallory line. I detest that.

It's there 4305M one, 4 port with gauge port.

 

[Newbomb Turk]

It's there 4305M one, 4 port with gauge port.

Let me see what I have at home when I get there tomorrow.

If I have one you can have it.

I just bought two rebuild kits for my regulator. That should outlast me.

 

[Newbomb Turk]

It's there 4305M one, 4 port with gauge port.

I can’t find the part number on line for the rebuild kit for your regulator.

I can post the part number I have and you can tell me if that’s what you need.

 

[Matts440]

I can’t find the part number on line for the rebuild kit for your regulator.

I can post the part number I have and you can tell me if that’s what you need.

Thanks for checking, but it's all good since I bought the aeromotive one, which will suite the set up better. Now just need to replumb that one in.

 

[Matts440]

Well I don't know what to think anymore on this car. Still doing the same thing, even after readjusting all the rockersto cold. Both triggers are set perfect. Alternator wire covers with rfi suppression wrap. Here's a tooth log. Have a datalog of it starting then dying again like before and misfire. Crank tooth on #1 and cam half moon center per megasquirt. New spark plug wires. Wondering if I need to borrow my buddies bore scope maybe a piston is shot from going lean.

 

[Matts440]

Wonder if a coil is going out??

 

[Newbomb Turk]

Wonder if a coil is going out??

@TT5.9mag

 

[TT5.9mag]

Well I don't know what to think anymore on this car. Still doing the same thing, even after readjusting all the rockersto cold. Both triggers are set perfect. Alternator wire covers with rfi suppression wrap. Here's a tooth log. Have a datalog of it starting then dying again like before and misfire. Crank tooth on #1 and cam half moon center per megasquirt. New spark plug wires. Wondering if I need to borrow my buddies bore scope maybe a piston is shot from going lean.

View attachment 1716474243

What’s it doing? Just randomly dying after it’s running? If your tooth loggers are showing good and it’s staying in sync state then it’s dropping something else.

Wonder if a coil is going out??

One coil won’t make the thing shut off. It would have to loose (I’m guessing here) 3-5 coils before it would just quit.

 

[TT5.9mag]

@TT5.9mag

Wish I knew. Thanks for tagging me. Funny I gave Matt the coils he’s using. I hope that’s not the problem. lol there are a few guys here more familiar with the megasquirt stuff. Hopefully they’ll chime in.