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-   -   Fire up questions? (https://www.offshoreonly.com/forums/do-yourself-boating-budget/208041-fire-up-questions.html)

n20michael 05-02-2009 01:45 PM

Fire up questions?
 
Hey Guys, just curious, warm and at idle, how much oil pressure should a 95 454EFI motor have, same with water pressure, I have only fired it up on the "muffs" and would like to have an idea of how warm it should be, I think the idle is a little high too, its idling around 1K RPM, thanks for the input!

Griff 05-02-2009 02:13 PM

You can't get consistent water temp readings on a hose. Put it in the water for real numbers.

Idle water pressure will be 3# or less. Oil pressure should be anywhere from 20-30# at a warm idle.

n20michael 05-02-2009 03:28 PM

Thanks Griff, that makes sense, although my oil pressure is around 50lbs at "idle", but, my idle speed was around 1100 RPM, it dropped off a bit once the motor warmed up though.

Boat Tech 05-02-2009 06:13 PM


Originally Posted by n20michael (Post 2857481)
Thanks Griff, that makes sense, although my oil pressure is around 50lbs at "idle", but, my idle speed was around 1100 RPM, it dropped off a bit once the motor warmed up though.

It should idle at 600 rpms once it reaches 154 degrees and the temp will normaly level off at around 163, But most gauges will read 175 at the dash. If engine is cold it should idle a bit under 800 rpms.

n20michael 05-02-2009 06:19 PM

Great!, my temperature is right about where it should be, I am running around 150 degree's, by the gauge, but, I imagine the water coming out of the hose is pretty darn cold too, plus there is no "load" on the motor while its sitting on the trailer at idle?

The idle speed is WAY too high, as I suspected. I am idling around 1100RPM, could it be the TPS? or maybe just an adjustment on the throttle cable [do EFI motors have any throttle cable adjustment?] I am not sure what else would affect idle speed that is user adjustable?

THANKS for the input, I feel a little better knowing where I "should" be!

Boat Tech 05-02-2009 06:50 PM


Originally Posted by n20michael (Post 2857539)
Great!, my temperature is right about where it should be, I am running around 150 degree's, by the gauge, but, I imagine the water coming out of the hose is pretty darn cold too, plus there is no "load" on the motor while its sitting on the trailer at idle?

The idle speed is WAY too high, as I suspected. I am idling around 1100RPM, could it be the TPS? or maybe just an adjustment on the throttle cable [do EFI motors have any throttle cable adjustment?] I am not sure what else would affect idle speed that is user adjustable?

THANKS for the input, I feel a little better knowing where I "should" be!

Well the first thing you do is find the throttle cable on the engine and try pulling it down to a idle, If it don't come down pull the cable off the throttle body and see if it will come down, If it don't then it could be a number of things with the EFI system, But the big Question is are you "sure" you tack gauge is adjusted right and reading right? Dose the engine sound like it is idling hi?

n20michael 05-02-2009 07:04 PM

OK, will give that a shot, wasn't sure if there was any "user adjustment" on the EFI set up, things where ALOT easier when you could turn the idle down with a screwdriver!, ha ha.

Yes, I think the Tach is correct, the motor definately sounds like its idling alot higher than it should, maybe in transport and while redoing some wiring in the dash/engine are the cable got caught and/or pulled, will have a look, Thanks!!


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