|
Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
|
Thread Tools | Search this Thread |
06-27-2014, 11:56 PM | #1 |
Senior Member
Join Date: Mar 2013
Drives: Asphalt 2013 FR-S
Location: United States
Posts: 140
Thanks: 163
Thanked 41 Times in 33 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
Oil pressure drops to zero after a cold start?
Last Saturday I installed the Innovate Motorsports 3852 MTX Digital Series Dual Function Oil Pressure and Temperature Gauge Kit on my modded FRS. Since then I have noticed that after a cold start that my oil pressure would appear to drop to zero at around 3,000 rpm and sometimes at around 2,500 rpm.
Here's a video that I took with my camera phone after work before driving home. The car is parked and not in gear for the vid but the same thing happens when driving. [ame="https://www.youtube.com/watch?v=jwYgi7c9Pmw"]Oil pressure drops to zero on cold start - YouTube[/ame] Any ideas as to what is going on here? This only happens when the engine oil is still cold. Once it has warmed up the oil pressure values behave as one would normally expect. You can check my build thread in my sig for my list of mods, but any relevant mods would most likely be my fm oil cooler with a mocal thermostatic sandwich plate, a Mishimoto MMOP-TPS Oil Sandwich Plate Adapter and an Innovate super charger. The setup my look a little goofy but until now I thought it was working fine. The car has behaved fine for the most part on both the streets and at the track. I've had the sandwich plate adapter and sensors installed now for a few weeks. In that time I have tracked the car at Streets of Willow at Willow Spring Raceway. If you're unfamiliar with that track you can check it out on Gran Turismo 6 I'm not losing any oil that I am aware of and the car feels no different than before. When I first installed the gauge and saw the pressure drop to zero all the time when revving to 3,000 I thought that I had a defective unit, but after the oil warmed up everything appeared fine. I don't know, maybe I do have a bad unit, but it's weird that it always happens at around 3,000 rpm. I normally drive my car under 4,000 rpm due to an annoying rasp that starts up at that range. On cold starts I usually keep the rpms under 3,000, but in the mornings the pressure drops to zero sometimes at around 2,500 rpm. I live in a hilly area so short shifting at 2,000 rpm feels terrible and my oil doesn't usually get up to temp until I'm about 3 blocks away from work. So for the most part I'm really babying the car. Is anyone else seeing this weird pressure drop? I can't imagine that this is normal.
__________________
|
06-28-2014, 12:01 AM | #2 |
Senior Member
Join Date: Oct 2012
Drives: 2013 BRZ satin white pearl sportech
Location: Thunder Bay Ontario Canada
Posts: 1,813
Thanks: 842
Thanked 911 Times in 576 Posts
Mentioned: 43 Post(s)
Tagged: 0 Thread(s)
|
I'm willing to bet you're exceeding the pressure range of the gauge and it doesn't know what to do so it goes back to zero. I've heard these engines when cold exceed 125psi oil pressure but I don't have a gauge to verify
__________________
2013 SWP BRZ sportech. 11.11sec@129.01mph, 511whp on e70. FullBlown base kit, FullBlown built 9.5:1 engine, GTX3076R GEN2 turbo, 1700cc Bosch injectors, FullBlown flex fuel kit, FullBlown radiator and oil cooler, FullBlown custom 3" dual exit exhaust, act xtreme clutch, whiteline diff and subframe inserts, BC Racing coilovers, hotchkiss 18mm rear sway, is300 3.73 differential ... Never finished
|
The Following User Says Thank You to Dipstik-sportech For This Useful Post: | MINOCIN (06-28-2014) |
06-28-2014, 12:14 AM | #3 |
I Love custom Turbo kits
Join Date: Mar 2012
Drives: Limited BRZ
Location: Miami
Posts: 10,770
Thanks: 20,004
Thanked 8,346 Times in 4,361 Posts
Mentioned: 441 Post(s)
Tagged: 12 Thread(s)
|
I have same gauge, have never seen that behavior. Anything above 100, pegs at 100. Will be interesting to see if it is something electronically wrong with gauge/sender or actually oil cooler.
__________________
|
The Following User Says Thank You to Sportsguy83 For This Useful Post: | MINOCIN (06-28-2014) |
06-28-2014, 12:17 AM | #4 | |
Senior Member
Join Date: Mar 2013
Drives: Asphalt 2013 FR-S
Location: United States
Posts: 140
Thanks: 163
Thanked 41 Times in 33 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
Quote:
You might be right. I hoping that someone with an oil pressure gauge like mine or similar (i.e. a max psi value of 100) can perhaps verify by checking to see if they notice the same weird behavior. I'm actually not too pleased with this gauge anyway. After installing it and seeing it in use I immediately wished that I went with a dual gauge that includes a readable temp value instead of just some lights. I guess it's like they often say, you get what you pay for.
__________________
Last edited by MINOCIN; 06-28-2014 at 01:10 AM. |
|
06-28-2014, 12:20 AM | #5 | |
I Love custom Turbo kits
Join Date: Mar 2012
Drives: Limited BRZ
Location: Miami
Posts: 10,770
Thanks: 20,004
Thanked 8,346 Times in 4,361 Posts
Mentioned: 441 Post(s)
Tagged: 12 Thread(s)
|
Quote:
I set mine to 200 last green so first yellow is over 200, good to trash the car. Each increment yellow is + 4 degrees.
__________________
|
|
The Following User Says Thank You to Sportsguy83 For This Useful Post: | MINOCIN (06-28-2014) |
06-28-2014, 12:21 AM | #6 | ||
Senior Member
Join Date: Mar 2013
Drives: Asphalt 2013 FR-S
Location: United States
Posts: 140
Thanks: 163
Thanked 41 Times in 33 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Thanks for the info. This is what I was afraid of. Perhaps I do have a bad unit. I guess if anyone else noticed this they would've posted something already. Oh, but then again I didn't really do an extensive search before my post I mainly just found stuff about normal oil temps and pressures. EDIT: Quote:
Oh, good to know. Thanks I new what the temp ranges were for the colors but I didn't know you could set the actual increment values as well. That's not as bad as I thought then. But I wonder why the pressure is dropping to zero?
__________________
|
||
06-28-2014, 12:28 AM | #7 |
Senior Member
Join Date: Feb 2013
Drives: '13 BRZ, '06 997, Other Things(TM)
Location: Santa Barbara, CA
Posts: 1,078
Thanks: 1,715
Thanked 670 Times in 351 Posts
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
|
Man, that gauge would drive my peripheral vision utterly insane within twenty seconds. If they're gonna use a really bright, large, digital readout, they should at least make the update frequency like once every 3/4's of a second or something. With the numbers changing at that pace it just looks like the thing is flickering.
Could you maybe use one of those smartphone apps and OBD wifi adapters to get another pressure readout and see if that matches the gauge? |
06-28-2014, 12:31 AM | #8 | |
Senior Member
Join Date: Mar 2013
Drives: Asphalt 2013 FR-S
Location: United States
Posts: 140
Thanks: 163
Thanked 41 Times in 33 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
Quote:
EDIT: I actually do have a blutooth OBDII scanner and the torque app, but I am unable to get an oil pressure reading from it. I also do not trust the oem oil pressure sensor due to an incident that I had with one of my oil cooler lines popping off once and my car losing about 6 qts of oil without a single peep from the ecu. No check engine warning light or anything. Hence why I purchased the gauge and sandwich adapter.
__________________
|
|
06-28-2014, 12:41 AM | #9 | |
Banned
Join Date: Sep 2013
Drives: 2013 GBS BRZ Limited
Location: Colorado
Posts: 1,925
Thanks: 627
Thanked 1,445 Times in 711 Posts
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
|
Quote:
If you are correct the voltage will climb until it drops off adruptly. This would just mean that you do not have a defective gauge. Also the other terminal on that unit might be a low pressure switch (depends on the model). If so, you could monitor that with a meter and see if you get continuity when the gauge reads zero. That would mean a real pressure drop. COuld you have your pressure gauge hooked in somewhere that gets no pressure as the thermostat switches?? On my racecar, I have a mechanical pressure gauge and a VDO electric one. The mech was just in case I had an electrical probelm and couldnt trust the VDO during breakin. |
|
The Following User Says Thank You to stugray For This Useful Post: | MINOCIN (06-28-2014) |
06-28-2014, 12:57 AM | #10 | ||
Senior Member
Join Date: Mar 2013
Drives: Asphalt 2013 FR-S
Location: United States
Posts: 140
Thanks: 163
Thanked 41 Times in 33 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
More useful information and advice. Thanks!
Quote:
Quote:
But if the answer was Yes then wouldn't that mean that the switch is activating every time I hit 3000 rpms. That doesn't sound right to me. Honestly though I really have no idea. I honestly felt like I could get by with a cheaper gauge like this one because I only track my car about 6 times a year. Right now it's primarily a street car and I didn't think that I would be pushing the car too hard on the streets to warrant race-level gauges and equipment. However, I'm starting to realize that one doesn't necessarily have anything to with the other. Only that when racing at the track (or whenever you are at speed) you really want to be able to trust your car and equipment, because there is definitely less room for error.
__________________
Last edited by MINOCIN; 06-28-2014 at 01:09 AM. |
||
07-06-2014, 11:34 PM | #11 |
Senior Member
Join Date: Mar 2013
Drives: Asphalt 2013 FR-S
Location: United States
Posts: 140
Thanks: 163
Thanked 41 Times in 33 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
Ok, so I finally got a multi-meter to check my pressure sensor along with my gauge. However, the volt meter readings are as confusing to me as the gauge readings.
Here's a vid of my volt meter readings. Watch with volume to see the voltage change as I rev up the engine. [ame]http://youtu.be/obc4J8yojFA[/ame] I was only able to get a few revs in before the gauge stopped reading zero. When revving to 3,000 rpms the multi-meter would display OL (over limit). The weird thing is though that as I would rev up the engine the meter would show the voltage drop before getting the OL symbol. From what I can see, the behavior from the meter and the gauge are both the same. The only difference is that when holding 3,000 RPMs, the gauge would read zero while the meter read 3.69 volts. At idle and when building revs to 3,000 the meter measurements were in mili-volts (mV). Only after hitting 3,000 revs and getting an OL on the meter would the measurements change to volts. I'm still confused by what I saw, but my best guess is that since the meter displayed 3.69 volts when holding the engine at 3,000 then the pressure really isn't dropping. However, I'm still unsure about this because the meter did clearly show the volts drop when building up to 3K. On my final rev to 3K the gauge did not show the pressure drop to zero, nor did the meter display OL or 3.69 volts. Instead the meter read 0.001 volts and the gauge read 100. I do not know what to make of that. According to the software by Innovate that came with my gauge, the sensor reads 0 to 5 volts- where 0 volts is 0 psi and 5 volts is 100 psi. The only time I saw a reading over 1 volt was when the gauge read zero and the meter read 3.69 volts. The rest of the time the measurements were in mV.
__________________
Last edited by MINOCIN; 07-07-2014 at 02:52 AM. |
07-06-2014, 11:55 PM | #12 |
in orbe terrum non visi
Join Date: Jan 2014
Drives: violent
Location: Mountains
Posts: 1,747
Thanks: 279
Thanked 762 Times in 446 Posts
Mentioned: 62 Post(s)
Tagged: 1 Thread(s)
|
Ol on my fluke meter means an open circuit.
__________________
I have E85 where there isn't E85, that's my secret. http://www.ft86club.com/forums/showt...t=reaper+build
|
07-07-2014, 01:17 AM | #13 |
Banned
Join Date: May 2014
Drives: around
Location: r3dn3ck's butt
Posts: 451
Thanks: 1,145
Thanked 620 Times in 357 Posts
Mentioned: 14 Post(s)
Tagged: 1 Thread(s)
|
|
07-07-2014, 01:22 AM | #14 |
Senior Member
Join Date: Mar 2013
Drives: Asphalt 2013 FR-S
Location: United States
Posts: 140
Thanks: 163
Thanked 41 Times in 33 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
I connected the leads to the output terminals on the pressure sensor.
__________________
|
|
|
Thread Tools | Search this Thread |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Cold start question | retrosmiths | Scion FR-S / Toyota 86 GT86 General Forum | 106 | 11-15-2016 03:14 PM |
Recommended cold tire pressure for PSS | 1Cor10:23 | Tracking / Autocross / HPDE / Drifting | 3 | 06-04-2014 11:24 AM |
backfire at cold start | FreaQshoQ | Scion FR-S / Toyota 86 GT86 General Forum | 15 | 10-16-2013 07:21 AM |
White Smoke cold start up in Cold Weather (turbo cars) | whitefrs | Forced Induction | 17 | 09-25-2013 06:05 PM |
FR-S cold start stumble - video | whtchocla7e | Issues | Warranty | Recalls / TSB | 11 | 04-17-2013 08:02 AM |