anybody ever make their own spark plug wires? stumbling in boost...
- Thread starter alloyguitar
- Start date
So, I believe I've discovered my problem.
...we pulled off the upper intake manifold to hook up some wire seperators and steal my fuel rail to weld in a -8an bung for my new afpr (got a good deal on a holley 1:1 boost referenced on ebay. 29 bones) and noticed that there was coolant sitting in the runners. Not a lot, mind you, but it was still coolant.
Now, the car has an hks mhg, but it was installed prior to my owning it, so I cannot guarantee the work at all, but I can say that we retorqued it to 78ish ft. lbs (my motor tech did it, so I don't remember the exact number) when we relocated the fuse box to the front bumper earlier this year and didn't seem like it had any trouble until it hits boost. It idles flawlessly and runs perfect up until 10ish lbs of boost.
What I'm thinking is that the wall of missing I was describing earlier was coolant leaking around the cylinders due to bhg. I do know that the individuals who installed the headgasket were big mustang guys and don't know anything about forced induction of any kind so I HIGHLY doubt they shaved the head, or even checked the block with a straight edge before installing it.
So, long story short, looks like I'm going to be swapping a headgasket. I'm probably going to throw a spare stock hg that I have laying around from a gasket set in it and see if that helps.
If it doesn't, I'm lighting the car on fire.
...we pulled off the upper intake manifold to hook up some wire seperators and steal my fuel rail to weld in a -8an bung for my new afpr (got a good deal on a holley 1:1 boost referenced on ebay. 29 bones) and noticed that there was coolant sitting in the runners. Not a lot, mind you, but it was still coolant.
Now, the car has an hks mhg, but it was installed prior to my owning it, so I cannot guarantee the work at all, but I can say that we retorqued it to 78ish ft. lbs (my motor tech did it, so I don't remember the exact number) when we relocated the fuse box to the front bumper earlier this year and didn't seem like it had any trouble until it hits boost. It idles flawlessly and runs perfect up until 10ish lbs of boost.
What I'm thinking is that the wall of missing I was describing earlier was coolant leaking around the cylinders due to bhg. I do know that the individuals who installed the headgasket were big mustang guys and don't know anything about forced induction of any kind so I HIGHLY doubt they shaved the head, or even checked the block with a straight edge before installing it.
So, long story short, looks like I'm going to be swapping a headgasket. I'm probably going to throw a spare stock hg that I have laying around from a gasket set in it and see if that helps.
If it doesn't, I'm lighting the car on fire.
Not as of this moment. The car is stored about 40 miles from where I live, so I haven't had a lot of time to mess with it.
The thing that gets me is that there's no oil in the coolant or vise versa. There's just some sitting in the runners and I'm not really sure what else it could be, other than the hg.
thoughts?
The thing that gets me is that there's no oil in the coolant or vise versa. There's just some sitting in the runners and I'm not really sure what else it could be, other than the hg.
thoughts?
leaky throttle body, you could have it leaking in from the little port on the bottom of the manifold, or you could have a leaky ISC...
when you really start thinking about where the coolant runs through, theres quite a few places.
and check your plugs to see if its localized to one cylinder, or its across them all.
when you really start thinking about where the coolant runs through, theres quite a few places.
and check your plugs to see if its localized to one cylinder, or its across them all.
Well, the coolant doesn't run through the throttle body anymore...
...and I don't have an isc.
I'll talk to my motor guy and maybe he can recall, but I BELIEVE that it was in pretty much every cylinder. 3 or 4 of them at minimum.
...and I don't have an isc.
I'll talk to my motor guy and maybe he can recall, but I BELIEVE that it was in pretty much every cylinder. 3 or 4 of them at minimum.
i have custom made wires , i have made two set's of them about 2 feet long to work with the coil packs mounted on the support bar for the intake manifold, works great and i habe made 375whp like this and going to dyno again tuesday hopefully over 400whp+!
alloyguitar;1201851 said:
Pull the plugs now to see where the coolant is CURRENTLY residing at, IF it is at all in any of the cylinders.
Have you looked at what the oil looks like under the oil fill cap?
And the last tell tale: are your coolant levels dropping?
It only loses coolant when it hits wastegate, and it's in the intake runners, not the cylinders. During regular driving it's fine.
Or, well, I haven't checked, at least.
The bottom of the oil cap is fine, and there's no oil in the coolant, or coolant in the oil.
I've dealt with bhg before on supras, so it's not my first walk in the park as far as that is concerned, but the lack of "milkshake," if you will, under the oil cap confuses me.
Or, well, I haven't checked, at least.
The bottom of the oil cap is fine, and there's no oil in the coolant, or coolant in the oil.
I've dealt with bhg before on supras, so it's not my first walk in the park as far as that is concerned, but the lack of "milkshake," if you will, under the oil cap confuses me.