BUP

Actually they are good oil filters to. .

SB

Are the other guages doing it to ? If so, check main leads at dash and back in engine compartment.

If just oil psi gauge (+mechanical guage shows fine -) ck it's + / - connections, connection back at sender.

If okay, you could have schit in the sender.Not un common after a not so clean rebuild.Silicone / dirt / smegma ...LOL. The hole in the sender is tiny and easy to plug. Do not use teflon tape on fittings. Use Permatex 4 or equivalent thread sealer.

nunnink23

True. I feel like oil pressure couldn't possibly fluctuate that quickly. It just doesn't seem possible.

SB

So,how did the rest of the run go ? Did you try the original injectors ? Oil leak taken care of ?

nunnink23

Oil leak is thankfully taken care of it seems. My power steering pump is leaking a bit, which I expected. I know it's an automotive pump, but i just need to figure out which one, since the pressure relief valve may be different.

The engine runs as good as a TBI engine could run. It responds really nice from lower RPM's. Unfortunately just like last year, if I am around 4000 and peg it, it just seems to fall on its face. It barely increases in rpm. It's mostly a function of the boat I think. It's heavy and underpowered. If I accelerate from lower rpm's it seems better. Tbi's are not the best I guess.

It peaks out at 5000 rpm with the tabs up and trimmed high. Sounds really healthy.

Nothing wrong with the original injectors. I did notice that the first few times I turned the key on after putting them in, fuel sprayed out of the Injectors without me cranking it. But I assume that's due to them being dry or something. Since then it doesn't do that.

Once I am 100% sure my oil pressure isn't actually dropping to zero randomly, I will take her on a long ride to Long Island.

Really happy to be able to turn the key and hear her roar to life.

BUP

I have a story - anyways its up online now - the magazine copies has been out for the while so I thought I would post it especially on this thread. Always my articles are in the back of the magazine. I guess they save the best for last - LOL

story is about fuel injectors and tab bit about servicing them. flip thru if you like.

http://www.emconsultinginc.com/Digit...h/Spring_2015/

BUP

Funny the first page of my story has a pic is a TBI system years ago that is the same as Matts = OP here. how coincidental is that.
click on the link

http://www.emconsultinginc.com/Digit...pring_2015/#18

nunnink23

Great article! I didn't know direct injection is coming out this year. That will be very interesting.

I wish we didn't have two days of rain here... I want to make sure my damn oil pressure is okay, and not dropping to zero. If it was my engine is already toast anyway.

Pliant

That is good humor...this could read a story with in a story there are thousands of marine tbi system's out there right now that can no longer be supported with the proper
part's. I don't believe the right replacement injector were ever truly found as of yet, i would be stunned if the 11's are the correct injector...Nun why dont you try both sets of injectors now that you have a running system it might pay off handsomely for some poor unsuspecting soul in the future if you know what i mean..

And speaking of oil pressure did you know your ecm is not turned on to report a possible failure that is one of the reasons why this issue went so far, had it been turned on the bad wiring would have alerted you to a possible failure.Bottom right hand corner

nunnink23

I know, and that's why I need to fix that pin. For now I just disconnected it, because I am terribly afraid of opening up the J2 harness to move that pin.

Anyone know off hand what thread size the engine oil pressure sender is? I was planning on tapping my gauge into that, so I can view my mechanical pressure at the same time that the gauge reads Zero.

Edit: I can try the TJ 11's before I send them back. It's the least I can do to help somebody else out.