lol. I've pulled that one before. You won't do it again.
'69 Valiant 2DR Project
- Thread starter DNasty777
- Start date
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TT5.9mag
Two atmospheres are better than one
Just call it rust prevention and tell everyone you did it on purpose.
In other news, I'm an idiot. I found the water pump gasket on my bench. I guess that explains the leaking water pump...
TT5.9mag
Two atmospheres are better than one
****
mygasser
Well-Known Member
DieWilde13
Well-Known Member
Great news!
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.
The runout on the crank pulley is crazy, I’ll reinstall it tomorrow and see if I can get it better.
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.
Good idea, I’ll try that. I’ll also try swapping coils as another test.
mygasser
Well-Known Member
test things one at a time though or you won't know what fixed it (if either does), lol.
neil.
Haha definitely have done that before
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?
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.
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.
TT5.9mag
Two atmospheres are better than one
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
Well-Known Member
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.
neil.
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.
mygasser
Well-Known Member
fingers crossed it's an injector at fault then 
neil.
neil.
It doesn’t seem to be the coil or injectors, unfortunately. The injector wiring probes out fine as well.
I guess it’s time to do a compression test.
I guess it’s time to do a compression test.
mygasser
Well-Known Member
****, that's not good news
Definitely not. I just checked compression on 1,5, and 7 because they are the easiest to get to and it looks like I'm down a hole. 1 and 7 were both 135psi, 5 was at 20. I took the valve cover off and it looked like the rockers were actuating but I'll check for bent pushrods and flat lifters on #5 anyway.****, that's not good news
At this point, I just hope its in the heads or valvetrain. I have a set of IMM ported import heads, new rockers and an LA single plane waiting in the wings.
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