Oil light flashing on and off wtf?
 

Like the title says, I have a 95 prelude with an h23 in it. only sometimes does it do it but when it does its after the engine has warmed up and at idle it starts flashing. With a oil pressure guage hooked up to it, it shows almolst 45psi of oil pressure at idle when its cool so what gives???

edit: I know the flashing oil light means "temporary loss of oil pressure" but why, theres a new sending unit in it still does it.

I've heard of some contacts on the back of the cluster might be bad or some crap?

Re: Oil light flashing on and off wtf?
 

45 when cold, but what about when it warms up?

Re: Oil light flashing on and off wtf?
 

I dont know, but it its fine cold the pump has gotta be fine right? this thing only has 130,000 on it but it was sitting for a while maybe a year or more without being run.

Re: Oil light flashing on and off wtf?
 

Not necessarily. Check the pressure when hot.

Re: Oil light flashing on and off wtf?
 

pump could be fine, bearings could be toast. Or it could all be fucked. Or it could all be fine...but id bet against it if the dummy light has been flashing

Re: Oil light flashing on and off wtf?
 

I dont think a loose connection would do it. Switch is normally closed so any breaks in the wiring couldn't turn the light on. I forgot to connect mine once and the light just never came on even when the engine wasn't running.

Re: Oil light flashing on and off wtf?
 

ditto

Re: Oil light flashing on and off wtf?
 

normally open

if you've got a fucked up idle, (low/rough idle) the rpm's might be falling low enough that the pump doesn't generate quite enough pressure.

you need a gauge on there so you can check it through it's paces, otherwise it's just a bunch of useless guessing.

Re: Oil light flashing on and off wtf?
 

same thing happens in my corolla, i got a new switch but its too much of a bitch to replace it so i said ---- it. i wanted to hook up a gauge but toyota made the treads in the oil pressure switch hole to be 3/8'' british nominal pipe threat, i spent forever looking for it and i finally called the stealership and they said they just put in a new oil pressure switch and monitor it from there. :7

Re: Oil light flashing on and off wtf?
 

yeah i would say that too. also check your oilpan see if its dented this caused that on mine, also if your oil is too thin for some reason. i got water in my oil from the breather on the VC and then vtec wouldn't engage and the light flashed.

don't ignore it though.

Re: Oil light flashing on and off wtf?
 

^^^
definately don't ignore it. you check it out already? my bud's engine is on the stand right now because of a problem just like this. oil light would flash when temps were up but he had an oil leak and just added oil when it got low and assumed that was the problem. turns out we ended up putting new bearings in within 2 weeks and cleaned out the oil pickup which was clogged up with shavings. 2 more weeks later the engine has to come out because we didn't check out the oil pump at first and wrecked the new bearings. you can pick up an oil pressure gauge for under $30 at a local auto parts store or even in the automotive section of stores like walmart. cheap insurance for your engine

Re: Oil light flashing on and off wtf?
 

Same thing happpend to me; ended up being the pump..... guss how I came to find that out :-X.

Re: Oil light flashing on and off wtf?
 

well its been going on for about 8 months now and there isnt even the slightest ammount of knock/weird noises

Re: Oil light flashing on and off wtf?
 

Knock:Engine failure as Oil light:oiling problem

The first symptom only comes when you are already fucked.