Noisy Starboard transmission...rich engine

[405driver]

Thanks Viper.....

I'll post the computer readings, fuel pressure and compression readings in the morning...busy schedule today.

Thanks for all of your wisdom.....

[hausherrs]

If you do want to get your injectors professionally cleaned send them to www.witchhunter.com. They are the best. And personally I wouldnt trust anyone else.

[405driver]

Viper, I'm just curious...my pictures aren't here. Did I mess up posting them?

Thanks

[405driver]

Here's the latest:

The compression test found all cylinders between 165 and 170 lbs. whew!

Fuel pressure was about 40 with the key on and engine off. Leak down was negligible. In idle, the FP was about 40 with rapid fluctuations from 37 to about 42.

I have attached a snapshot of the computer screen with the engine running at idle.

We have removed the injectors and they are on the way to Witchhunter and we have ordered a fuel pressure regulator. I am also going to replace the IAC while I can easily get to it. I think I will also remove and clean the throttle body.

Since the top of the engine is apart, I have considered doing the valves as the visible slick on the water might be oil leaking down a valve guide.

I have a good friend who works for Olympus and sells very sophisticated bore scopes. He has offered his expertise. Does anyone know that if a valve guide is leaking are there any signs of a leak that might be visible inside the cylinder.....as in a stain or the leak itself?

Thanks to all....

[405driver]

Correction:

The fuel pressure fluctuates between 37 and 40 psi rather rapidly. I have a video and tried to post it but I took with an iPhone and it's not a compatible format, (m4v) and it's to big.

[Viper]

Source of the post Top

I see one picture of the Diacom screen

[405driver]

That's all I posted... video was wrong format....

[km1125]

Fuel pressure was about 40 with the key on and engine off. Leak down was negligible. In idle, the FP was about 40 with rapid fluctuations from 37 to about 42.

Hmmmm... that changed. Back on the 17th, you said:

Source of the post So, if I understand you correctly, when we checked the fuel pressure with the vacuum hose off, it read to high (40). Then when we reconnected the hose, the fuel pressure dropped down to about 30.

Was the hose connected when you did the test today? If so, then I'd suspect the FP regulator, or a low vacuum condition.

Also, you should be able to tell if it's gas or oil in the exhaust by capturing a bit of it and smelling it, or letting it sit for a bit. If it was gas, it will evaporate... oil won't.

The other thing you mentioned in an earlier post was : "I noticed what appeared to be steam (or smoke, I suppose) was coming out of the exhaust and a film of either gas or oil on the water. Hopefully, it's gas. To compound it, I started the other engine and took a look at it's exhaust. There is only water coming out...no smoke (or steam) or oil (or gas)."

Are you pumping the same amount of water through both engines, or is it possible low water flow might be contributing to what you can see?

[km1125]

I'm beginning to suspect a vacuum leak somewhere... that would explain rough idle and the IAC being quite different between the two engines at idle. You do need to figure out what's going on with fuel pressure though (per last post)

Before you pull stuff apart, listing for a leak. Also, you can spray all kinds of things on relevant things like intake gaskets to check that, but be VERY careful (or just don't) using anything explosive like carb spray like you might on a car.

[Viper]

Source of the post.....I have considered doing the valves as the visible slick on the water might be oil leaking down a valve guide......

Knowing whether it's oil or fuel is very important or again, you're barking up the wrong tree and throwing $$$ at her you may not need to. Your tech should be able to tell the difference. We can throw out all kinds of theories here but we need more accurate symptoms or it's just a guess at best. If it's not oil, you could be sending your heads out and have the same problem after reinstalling. This can balloon out of control. You need to get some real facts before acting.

Is there any indication you are burning oil when you first fire up the engine? On bad seals, I would expect to see some smoke especially at startup. After shutting down, oil on top of the head will seep through the seal and accumulate/sit on top of an intake valve or drip into the cylinder if the valve is open. When you fire up the engine, you'll notice you're burning oil for a short period. How long and how bad depends on how bad the leak is and whether it's just from the seals or getting past the rings. You may also find the plugs sooty on the side that faces the intake valve.