Engine Not Running

[Jack2048]

I have a 1994 Volvo-Penta FI (Fuel Injected) V8 / Ford 302.
I reglassed my boat and thus the engine sat for a few years before I could get to it.
Now I am having problems getting it to run.
It will only run with full throttle. It started right up when I had the intake plenum off.
This is w/o water hooked up, so not looking at leaking risers.
Thoughts?

I have:

• Had the injectors professionally cleaned and tested.
• Refreshed / cleaned all ground connections.
• Replaced FPR, holds rest pressure.
• Checked plugs for spark.
• Replaced IAC, MAP.
• Checked TPS, gives a good sweep
• Replaced water pump
• Replaced circulating pump
• Replace fuel filter
• Cleaned float bowl, fuel rails

 

[cyclops222]

Did you check ALL of the intake air piping for dead animal way back in it ?

 

[alldodge]

What is the fuel pressure?
need to read for codes

Need workshop manual 7788852-7

 

[Jack2048]

Did you check ALL of the intake air piping for dead animal way back in it ?

Actually, yes, just stuck an inspection camera up the intake plenum orifices yesterday.

What is the fuel pressure?

40

 

[alldodge]

Pressure is good

Might have a vacuum leak

 

[ESGWheel]

Frankly I am confused or perhaps simply ill-informed. I do not understand how the engine can run without the intake plenum (manifold) nor do I understand that it only runs a full throttle > is the RPM raging at 3K or 4K and without cooling water?! > or it is barley putting along even though the throttle is at max? Please explain as I am always looking to learn.

My suggestion given the age is test the basics: fuel, spark, compression. Sounds like you have the first 2, how about the 3rd?

 

[kd4pbs]

Adding to the questions, what kind of EFI system uses a float bowl? I am intrigued.

 

[Jack2048]

Adding to the questions, what kind of EFI system uses a float bowl? I am intrigued.

The Volvo system does?
Unspent fuel does not return to the tank. It is sent to the float bowl then pumped back into the rail by the high pressure pump.

 

[Jack2048]

Frankly I am confused or perhaps simply ill-informed. I do not understand how the engine can run without the intake plenum (manifold) nor do I understand that it only runs a full throttle > is the RPM raging at 3K or 4K and without cooling water?! > or it is barley putting along even though the throttle is at max? Please explain as I am always looking to learn.

My suggestion given the age is test the basics: fuel, spark, compression. Sounds like you have the first 2, how about the 3rd?

Yeah, it's running pretty fast under those two conditions, shut it off after a few seconds. Oh, I was thinking compression was ok. Engine ran great before I started this project. I'll look into that.

 

[Scott Danforth]

The Ford EFI does not have a float bowl.

It's a variant of the Ford truck EFI with a custom mapped ECU and a marine only ignition

And without the upper intake on it, the motor would not be able to monitor incoming air or have any throttle . If it did start, it may have run to destruction

Check your compression

 

[kd4pbs]

Oh! The fuel cooler! Yeah, that isn’t a float bowl.
How old is the fuel you are attempting to burn? Is it free of water?

 

[cyclops222]

Save money while boating !!

 

[Jack2048]

Oh! The fuel cooler! Yeah, that isn’t a float bowl.
How old is the fuel you are attempting to burn? Is it free of water?

It may be a fuel cooler, but it has a side hustle as being a float bowl!

Fuel was purchased "recently". A few months ago by now. Haven't hooked up the tank since the rebuild. Coming straight from the can.