Livio928

This is an interesting thread I am following closely. I may have a somewhat similar problem albeit my injectors are flooding like yours, but I definitely have excess fuel in the cylinders, but not getting proper spark. I will try to look at LH as Dave is suggesting to see if that may be my problem. Engine was re-assembled and the car hasn't run in 4 1/2 years. I am keenly waiting on reports from Roger as to whether it is an LH problem or not. I think mine may be due to the lack of proper spark.

GregBBRD

That's crazy!

To get that lower plenum full of fuel, at lest one of the intake runners had to fill and overflow backwards into the plenum!

SeanR

Thank you Dave, things are odd on this one. You've had more experience with these than we do, so any thing you can add to assist is greatly appreciated.

I didn't believe him when he called me as there is no fvcking way that can happen, in my mind, with out a hose shooting right in to the intake. I about crapped myself when I saw it for myself. The pump had to have been running, with open injectors for so long that it was doing this as Roger had stepped away from the car. This might be one of the reasons this thing was on the salvage lot due to fire.

This "save" has a few fun issues to sort out and I think we've got a game plan, but you know how that changes. Bound and determined to make this POS a daily driver now.

jeff spahn

I have always wondered if I had a slight bend in one of my connecting rods after I tried to start the car and it was hydrolocked. It never has seemed to idle as smooth as a Lexus V8 or a new suburban for that matter, but that could be this engine design and I am crazy.

928 at last

1). Possibly. When mine is in the right mood, (not often, but it does happen) you can barely tell that it's running. Never hydrolocked to the best of my knowledge, which admittedly, is limited on a good day.....
2). Nothing to do with the design of the engine....sorry.
3). Yes, you are....but that's an entirely unrelated issue.

SMTCapeCod

That thing have a cold start valve? Or is it supposed to have one that was somehow replaced with open pipe? ;-) j/k

Hilton

I'm wondering whether a failed FPR (this car has two pressure regulators from memory? I think its the LH-based Euro's which do?) could dump that much fuel into the throttle body through the vacuum lines with repeated start/run/shutoff (such as when moving the car around a driveway to make space).

Each startup could re-pressurise the fuel system, and then bleed out into the throttle body, until it was totally full and burped.

OTR18WHEELER

...just a side note, the hydrolock I mentioned was due to driving into high water, so the engine had a few more rpms than just cranking over.

jeff spahn

Thanks OTIS () I just tried to start it and it wasn't running.

Hilton

Just re-read Roger's post. He's jumped the fuel pump for 5 mins before trying to start. If one of the pressure regulators or the dampener has failed with a hole in the diaphragm, that would just be 5 mins of pumping fuel into the throttle body. Failed FPR is more likely than LH IMO - that doesn't mean that failed LH/EZ-F aren't candidates, just that I'd play the percentages and check the more common suspects first.

ROG100

Hilton - Very possible and I have already changed the two fuel pressure regulators and the damper. For grins I will pull a vacuum on the originals so see if they were bad or not.

Imo000

Just pull the vacumm lines off the dampeners and jump the pump.

ROG100

I found that the engine was hydrolocked after I changed the fuel pressure regulators and damper. So it is possible the air guide was filled from a leaking regulator.

However the filling of the cylinders was AFTER the regulators and damper were changed.

Could not check the regulators and damper as the trash (dustbin) man has been.

RennPartsDirect

Roger- Any worthwhile results to mention about this issue? Has it happened again to that engine? Did you have to do any deeper repairs beyond the fuel delivery system?

SS

ROG100

As always - Life and other cars - have got in the way.
Sean is going to make me a new injection harness and I have a set of 24 Lb 4 hole injectors with GB adapters ready to add.
Hopefully that should correct the issue.