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Brain,
When performing the coolant pressure test while running the car, are you just checking to see what pressure it maintains? If so, what is reasonable? I'm going to perform the "running" test tonight. |
IIRC, you're supposed to pump it to around 15psi or so, then start the car, if it drops and/or pulsates theres a problem.
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Well, I started the car with it pumped to 18 psi. It never dropped or flickered when I started the car. However, after about 10 minutes I looked at the gauge again and it was at 25psi. The shenanigans also started again when the pressure was high. Once I removed the tester and replaced the radiator cap it did not hicuup again.
Seems like it is pointing to a HG leak.Damn I don't want to replace the HG. |
Well, should I buy this for confirmation.
https://www.napaonline.com/Catalog/C...006_0282509199 Or just put the money towards a head gasket??? |
Originally Posted by djp0623
(Post 774163)
Well, I started the car with it pumped to 18 psi. It never dropped or flickered when I started the car. However, after about 10 minutes I looked at the gauge again and it was at 25psi. The shenanigans also started again when the pressure was high. Once I removed the tester and replaced the radiator cap it did not hicuup again.
Seems like it is pointing to a HG leak.Damn I don't want to replace the HG. |
I guess I am going to find a leakdown tester. The HF cheapo model seems to get mixed reviews. However some sound like they aren't using it correctly. When I turned the car off it did hold 25 psi for what that is worth.
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I think the problem that I am dealing with is a firmware issue. I decided to take it for a drive tonight (no log) However the drop out occurred and it is too rhythmic to not be something hardware or firmware controlled. Unless the two capacitors in my COP harness good be affecting the voltage getting to the cops, then I think it is firmware related.
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I've started to notice a pattern in some of the events. I've seen in multiple instances that one pules will occur 25s after previous pulse. Here are some logs for kicks.
https://www.miataturbo.net/picture.p...pictureid=1814 https://www.miataturbo.net/picture.p...pictureid=1813 https://www.miataturbo.net/picture.p...pictureid=1812 |
2 Attachment(s)
here's your MS running on my STIM with the VR input for crank and MS3x input for Cam.
hopefully we don't see these gaps anymore. https://www.miataturbo.net/attachmen...1&d=1317570810 |
Very nice
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I put my MS3 back in after having a new circuit built that uses the MS3x board. The rich spike still occurs, but I never have a problem with the the CAS signal dropping out.
I decided to pull the head. I've been getting water out the tail pipe for some time, but my water level never seems to go down. When I pulled the head I noticed that all 4 cylinders had a clean strip that started at the edge of the cylinder and moved in towards the center. I think this would indicate coolant since it kept the piston type nicely cleaned in this area. https://www.miataturbo.net/picture.p...pictureid=1837 The nice part about pulling the head is that I have been able to look into my fears of det with my OP gauge flickering. There didn't look like there was a single pit in any piston. They were perfect. I'm going to use the opportunity of the head being off to add an aftermarket OP gauge since the sending unot is easily accessible at the moment. https://www.miataturbo.net/picture.p...pictureid=1838 I didn't want to wipe the pistons down before I took the picture. The coolant makes them look a lot worse than they were. I wiped them with papertowl,and removed a very thin film of gunk. |
SD logs
4 Attachment(s)
Here are some clips of my SD logs converted to .msl files
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This was posted over on the msextra forum:
Re: MS3x random rich condition by wrenchdad » Thu Oct 27, 2011 2:23 pm I had this same problem, could see the rich spikes at idle and had like constant missing while cruising PLUS sync lost. When I rewired my condensor fan output from using INJ F to an unused VVT output, no more misses, idle smoothed out but sync lost when down to 1-3 per hour of driving before it was 30+ in 10 minutes. hope this helps later wd |
Then try moving the wire on p4 on the MS3x DB37 to pin 27, copy the settings of INJ F to VVT under outputs.
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Good news! I'm going to leave everything alone and test alpha 15 when it comes out.
Re: MS3x random rich condition by wrenchdad » Fri Oct 28, 2011 6:32 pm jsmcortina wrote: I just double checked the code and it appears that fan control and idle-up (at least) are using unsafe code that could corrupt the injector outputs. (Main CPU and interrupts or XGATE colliding.) I'll fix that up for alpha15. James Thanks James !! I was using Inj F for AC Idle-up control, that's when I was seeing the rich spikes without any real change in PW plus the sync loses were killing me but just about have that ironed out. wd |
tech speak
Re: MS3 *beta* 1.0.3 released by jsmcortina » Sat Oct 29, 2011 7:41 am Newly found bug Using spare MS3X inj output as outputs such as fan control, AC idle up, shift-cut interferes with injector outputs. (Fixed for alpha15 and for 1.0.4) ------------------------- For the technically minded of you, the issue is lines like this: CODE: SELECT ALL *port_ac_out &= ~pin_ac_out; Harmless enough? However, because the CPU used on MS3 has a co-processor (the XGATE) which we use to control fuel and spark events, extra special care has to be used with any code that touches the same I/O. If you have configured AC to use an injector pin, that conflict is a reality. The code should be this: CODE: SELECT ALL SSEM0SEI; *port_ac_out &= ~pin_ac_out; CSEM0CLI; James |
Solved! Alpha 15 code solved the issue
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great, glad to hear.
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