'69 Valiant 2DR Project

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DNasty777 said:
Forgot to loop the trans line, sprayed everything down with trans fluid, so that’s fun. Chased down one small oil leak and a couple fuel leaks. All is good now. 75psi oil pressure so looking good on that front too.
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lol. I've pulled that one before. You won't do it again.
 
In other news, I'm an idiot. I found the water pump gasket on my bench. I guess that explains the leaking water pump...
 
Water pump gasket is on and the leak is fixed. I don’t think #5 is firing, or maybe it’s only firing sometimes. The header is gold on all other runners except 5 and the engine sounds like it’s galloping a little. I’ll try and get a video of it.

The runout on the crank pulley is crazy, I’ll reinstall it tomorrow and see if I can get it better.
 
4hr2oM6.jpg


The plug on the left is out of #5, right is #7. If you look at the headers you can definitely see a lack of color on the #5 runner. The plug looked brand new, opposed to its neighbors that were sooty from the rich tune. I’ll double check spark on #5. I have to think of a way to check the fuel injector for that cylinder.
 
DNasty777 said:
View attachment 1716254197

The plug on the left is out of #5, right is #7. If you look at the headers you can definitely see a lack of color on the #5 runner. The plug looked brand new, opposed to its neighbors that were sooty from the rich tune. I’ll double check spark on #5. I have to think of a way to check the fuel injector for that cylinder.
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Does the Holley have a test mode to test injectors and coils? Something to allow you to cycle them individually high/low to confirm your wiring is good before you dig in too much further?
 
subcom said:
Does the Holley have a test mode to test injectors and coils? Something to allow you to cycle them individually high/low to confirm your wiring is good before you dig in too much further?
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Yes it does have output testing, I’m going to check spark on #5. I think I can test injectors too but I’ll have to spray it into a bucket or something.
 
DNasty777 said:
Yes it does have output testing, I’m going to check spark on #5. I think I can test injectors too but I’ll have to spray it into a bucket or something.
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Just make sure the fuel pump is turned off. Disconnect it, pull the fuse/relay or whatever it takes and then run your injector test. That’s how I did it with my Megasquirt. You should be able to hear the injectors click when they go high. If they don’t then you may have a short somewhere.
 
subcom said:
Just make sure the fuel pump is turned off. Disconnect it, pull the fuse/relay or whatever it takes and then run your injector test. That’s how I did it with my Megasquirt. You should be able to hear the injectors click when they go high. If they don’t then you may have a short somewhere.
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It’s a valid test but you should also test them for flow. They can click and not flow fuel. Running pressure to em and cycling them in to a bucket is a good idea.
 
Spark on 5 looks fine. I’m going to order one of those cheap injector pulse boxes and try that next.
 
mygasser said:
now it seems to be fuel related why not just swap injector 5 with another that you know works? if 5 still won't fire it's the wiring not the injector and no money spent.
neil.
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I really hope it’s not the wiring, it’s the only portion of the loom I didn’t mess with! lol

Good idea, I’ll swap injectors. I have one of those thermal thermometers so I’ll grab a reading and see if that tells me anything. I have another set of bigger injectors showing up tomorrow too so I can swap if need be.
 
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