Oil gauge thinks its a Tach

nolan62

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Ok, built a lot of cars over the years but I've never seen this. I finally got the 5.0 swapped into my 95 and running. All seems fine expect for the oil pressure gauge. Now it worked before with the old engine so I tend to believe the gauge itself is fine. Also, I do know that stock gauges are crap. BUT, This one goes up and down as you rev the engine. At idle it is all the way to the left. If I press the gas pedal it shoots over to normal. Literally, just like a mini Tach.

Has anyone seen this before? I'm going to try the easy obvious fix and replace the oil sending unit. I need some ideas guys, I'm going to be upset if the oil pump is bad.
 

D3VST8R96GT

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All the way to the left As if there is no oil pressure?

No knocking? The sensor is basically on or off.
 
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nolan62

nolan62

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Correct. No knocking. I decided to call Ford Racing Tech support this morning. I remember the oil galley crossover, under the intake, at the back of the lifter valley. It don't think is had a plug. I think there is suppose to be one. I'll report back what they say.
 
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nolan62

nolan62

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Ford Racing Tech Support has saved the day. My short block was part of a series in 1995 that was pulled from the assembly line before completion and given to Ford Racing to sell. It is missing a few of the plugs. I found the others but missed one in the lifter valley. The oil crossover, under the intake, at the back of the block. It needs a 3/4" cup plug installed. I did notice it but didn't think anything of it when I assembled my engine. So, I have to take the intake back off AGAIN and plug that hole.

Lesson learned - If you buy it from Ford Racing, question every hole.
 
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nolan62

nolan62

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Nope, I bought this years ago for a 1964 Falcon project that died on me. This short block has been sitting around waiting for a home till now. But the Tech support guy was good enough to take time and go over the entire thing with me. Asking if I got this and got that. This is the only plug I missed. It's frustrating but I understand now why it was missing things. And if I had been more careful during the assembly I should have noticed the missing parts. So I grant the blame on this 50/50 with Ford.
 

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