How To Diagnose "Low Oil Pressure" 1990-2005 Mazda Miata

[@scottiniowa1]

Thanks for the video! The worse ones are the dummy gauges in the later NA Miatas that look like a gauge but are actually just controlled by an oil pressure switch. I'm in the process of adding an aftermarket gauge in mine.

[@GearHeadsGarageChannel]

Yea those Dummy Gauges are so dumb!! You adding an electrical one and putting it in a gauge pod or what?

[@alexanderhibbs3331]

Great trouble shooting video! Every ethusiest needs to learn these basic skills which translate to every repair job!

[@GearHeadsGarageChannel]

Thank you!! Yes I agree!

[@Sonic2War]

I have a 91 NA and I'm getting no reading whatsoever. Been like that since I bought the car, but your Ohm test is a good idea to see if Im getting anything out of the send unit! Thanks!

[@joshuaallender2986]

Very helpful, my 94 M is reading stupid low at idle. But it also has crap valve seals

[@realweston]

Very helpful thank you. Especially the tip with the Oms reading

[@youtuberbayleexiong908]

I would also very much recommend unplugged the cars battery while working in the oil filter area also where the starter is so you don't get shocked

[@jaimenegrete1253]

Merry Christmas, very good video, I think my NA Miata 1990 having same symptoms, I will follow your advise and check if I can solve this issue. Thanks a lot and greetings from Chile - South America.

[@jeremiahgaskins7205]

Always good content

[@GearHeadsGarageChannel]

Thank you Jeremiah I do my best to put out good quality information! Might not be the fastest but hopefully thorough!

[@WiSeNhEiMeR-1369]

HOWdy G-H, ... Thanks - same concern on my 1993 "NA" Miata You have alleviated my PANIC COOP the WiSeNhEiMeR from Richmond, INDIANA ...

[@EvenObject2]

I got a 30mm deep socket for the oil pressure sender it came off no issues

[@papajohnscookie]

Need to do this on mine, it looks so tricky to get access to though. Good video!

[@GearHeadsGarageChannel]

If you lift the car up and get underneath you can see better, but it doesnt give you much more room. Give it a shot, if your lucky the Sender will come off hand tight but probably not 😛 Get a stubby 17mm in there and take a shot!

[@melenciopabalate1187]

Very helpful, thank you.

[@HoboSmeller]

like before i even watch the vid, might have to take it back, lol JK!

[@gayden4669]

bro HOW did u get it off that easily I tried for hours and that thing is not comin off

[@montedaestrada3563]

Very interesting. Thank you. I am considering renovating my partners 1989/90 Eunos rather than scrapping it and basic engine tests and oil pressure are the first jobs to tackle.

[@LxrdGmail]

Dang I pulled my engine already because it had low oil pressure

[@GearHeadsGarageChannel]

lol oh boy! This is why things need to be properly diagnosed before jumping the gun! Hopefully your doing some fun stuff while its out!

[@LxrdGmail]

Haha it’s fine it needed all new seals anyways

[@GearHeadsGarageChannel]

@@LxrdGmail Hope it didnt actually have low oil pressure or your doing bearings and a pump!

[@LxrdGmail]

As I suspected I spun a bearing rod journal #1 has slight scoring I’m going to the machine shop tmr to see if it’s reusable will oversized bearings

[@GearHeadsGarageChannel]

@@LxrdGmail Well good luck! if its not too bad you should be alright 🤘

[@HoboSmeller]

finally finished watching this, i had been trying but i was busy at work all day, but side not, is Michelle or Micheal Rodriguez your shops matco supplier?

[@GearHeadsGarageChannel]

Hah yes she is actually howd you know ??

[@HoboSmeller]

@@GearHeadsGarageChannel cuz she is my shops matco rep as well and we work in the same city, super nice lady,

[@GearHeadsGarageChannel]

@@HoboSmeller Hah thats awesome! What kind of shop do you work in? and yes I work in Escondido but live in Ramona

[@HoboSmeller]

@@GearHeadsGarageChannel its a fleet service shop, all diesels, 2 and 3 axle tractors and trailers, everything with air brakes lol and i live in ramona too which is how i saw you that one day but i work in san marcos, i thought you did too lol

[@GearHeadsGarageChannel]

@@HoboSmeller I work on the edge of it between Esco and San Marcos lol Close enough. But thats cool man! Yes you are right she is great as far as tool reps go!

[@njjx8800]

I have the same issue in my 1990. Cold start my idle oil gauge reads 32, the at operating temps is at 28 @3000rpm

[@GearHeadsGarageChannel]

It is probably higher than that if you hook up a mechanical guage, unless you have a ton of miles on it.

[@njjx8800]

@@GearHeadsGarageChannel 106k

[@spice.3493]

Same

[@Nebbia_affaraccimiei]

14:28 i dont get it, how on earth is it measuring 0.0 ohm, on the chassis and 2.x on the block if the sender is screwed into the block?

[@GearHeadsGarageChannel]

I have no idea, very strange but after thinking about it MAYBE I was grounding it at the head and there was more resistance there than from the block to chassis. Honestly I dont think there should be and its interesting. Either way I know the sender has an issue so maybe after getting that taken care of I can figure out what is up with the ground acting like that.

[@dannylambert3038]

Does a 2015 miata have a oil pressure kill switch

[@ReticentEcho]

My NA 91 was showing 10 PSI at idle while warm, cleaned the contact and it’s back to normal working order. My resistance was 126 for 0 psi and 45 for 27 psi almost 30. The 30 psi is close to spec but don’t know what to make of 126 ohms resistance while off. Did you have the ignition on? Where did you get that service manual and how can I get a copy? Thanks, great vid. 👍🏽

[@GearHeadsGarageChannel]

I dont remember anymote if the ignition was on this was awhile ago 😛 as for the service manual you can buy one online or pay a fee for AllData for your car or similar. The specific program I was using is Mitchell ProDemand but I pay the monthly fee because Im in a shop lol

[@TeeDeeDubya]

How you get a hand and a wrench down there and connected to that bolt on the opposite side of the sender is some dark arts stuff. I have the frame of a horse jockey and I have spent 30 minutes trying to figure it out.

[@GearHeadsGarageChannel]

Use patience and be creative!

[@NatVirgo]

The issue for me is that I have 0 pressure till I hit the gas

[@TheMFChandler]

I got a 99 and mine has been reading good when I start and drive. When I slow down or turn it begins to drop down on L and pick up when I accelerate again.

[@tubesai]

Got the same issue, did you ever figured it out?

[@mariuscelerian9659]

Please help. Mine reads all the way up even when the engine is cold. As soon as i start my car, the pressure shoots all the way up.

[@GearHeadsGarageChannel]

The video is the help, I cover how to diagnose your issue and how the system works so that YOU can narrow down and identify the issue!

[@234Nick]

OL isn't 0 resistance. It is Overload which means infinite resistance.

[@GearHeadsGarageChannel]

Maybe I said 0 resistance and mis-spoke I should have said zero continuity. I am aware but probably said it wrong thanks for the correction!

[@hendersonwilliamk]

Too high for meter not infinite

[@GearHeadsGarageChannel]

@@hendersonwilliamk Yes too high for meter "technically" but practically speaking NO continuity lol

[@mavisarnold4371]

I have the same oil pressure issue with my 1990 NA Miata. Thought I'd buy a test kit and confirm faulty pressure sensor. If its the sensor, thought I'd just trash the $200 sensor and install the $20 mechanical test gauge in my dash somewhere where I can see it. What do you think?

[@GearHeadsGarageChannel]

Take apart the sensor and fix it instead. You dont want a cheapie $20 mechanical gauge going through the dash waiting to leak oil inside the car.

[@mavisarnold4371]

@@GearHeadsGarageChannel hmm, any vids on fixing sensor?

[@GearHeadsGarageChannel]

@@mavisarnold4371 Haha not yet but it is on my list of things to do!

[@mavisarnold4371]

@@GearHeadsGarageChannel thanks for the advice. Great video btw. Most helpful.

[@LN-gk8gz]

Can someone help me i have a 92 mx-5 and none of the Gauge clusters work at all what can i do ot fix this

[@GearHeadsGarageChannel]

Check all your interior fuses first. Did they just all die at the same time or what?

[@baltod4978]

Where's your buddy?

[@GearHeadsGarageChannel]

🤷‍♂️🤷‍♂️

[@baltod4978]

@@GearHeadsGarageChannel :( You guys have come a long way. Thanks for your videos. They've helped me out a lot as a new NA owner myself.

[@GearHeadsGarageChannel]

@@baltod4978 Thank you!! and if you are curious I did do a video about 4 weeks ago(my first video back in a long time) where I explain a bunch of stuff. and Matt was in the coolant pressure test video we did with my miata 2 weeks ago!