'95 VP 5.0Fi Temp and Fuel question

[jdblya]

I own a 1995 boat with a Volvo-Penta SX Cobra Drive and 5.0FI Ford based engine. My question is with engine coolant temp, fuel injection, and a/f mixture.

Here is a list of parts that are new on the boat

Thermostat
Temp Sensor for Gauge
Throttle Position Sensor
MAP Sensor
Engine Coolant Temp sensor
Air Intake Temp sensor
High Pressure Fuel Pump
Low Pressure Fuel Pump.

It seems like my boat is burning a lot of fuel (I know, it's a boat) but it just seems like it burns more fuel that it used to. All of the sensors for the Fuel Injection and been changed, but my I've always noticed that my Temp guage rarely ever gets past 130deg where most of the guys I know with Chevy based engines seem to run a lot higher. The temp sensor is in the engine water pump, so I don't know if it tends to read cooler because of where the location is or if something else is going on.

Anyway, I started my boat (it states to wait until normal operating temperature but it it is hard to say when looking at my gauge) and plugged in the scan tool and while runnning a KOER self test, it pulled code 21 for Engine Coolant Temp out of range. When referring to my Ford information (automobile but still EEC-IV) it says that the temp must read 180 or above to pass KOER.

Sorry for all the information, but I guess my real questions are:

-Does anyone have this same engine?
-Is my engine running too cold?
-What does your temp gauge generally read?
-Does anyone know what the resistance or voltage from the ECT sensor should be reading in this marine application?
-If it is reading too cold, would it be a bad idea to run a resistor for the ECT to make the computer think the engine is running a little warmer?
-Am I over thinking this entire situation? should I just enjoy the boat?

Thanks in advance for any help. I guess the biggest problem I've found is that not a lot of people have this boat. 1995 was sort of a change over year from OMC to Volvo. My boat says "EFI by OMC" on the back, and I have a mix of Volvo and OMC parts on my engine lol

 

[NHGuy]

Re: '95 VP 5.0Fi Temp and Fuel question

Well, your scanner says engine temp is too low. I'd take out my temp gun and confirm that the temp is what the gauge and scanner think. If the temp is low go find temp troubleshooting information for your engine. if you don't have it get the manual. I'd bet there is a troubleshooting process you can follow.

 

[shdw2001h]

Re: '95 VP 5.0Fi Temp and Fuel question

I had a very similar problem, my 96 Volvo 5.0 would not warm up. what it ended up being is there is a bypass in the thermostat housing, if this small hole is not clear it will not warm up. look through the large hose hole in the housing, use a flashlight, I bet the hole is clogged. use a wire or even a long small tipped screw driver to clear the hole. you might have to use the wire or screw driver to find the hole. what happens if the motor does not warm up all the way the computer thinks the motor is cold and will send it more gas.
Mine read 160 when fully warmed raw water cooled.
hope this helps.