idle perfect, then suddenly full rich on afr
09-21-2011, 09:46 PM
#23
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.
Seems like it is pointing to a HG leak.Damn I don't want to replace the HG.
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09-22-2011, 08:29 AM
#24
Well, should I buy this for confirmation.
https://www.napaonline.com/Catalog/C...006_0282509199
Or just put the money towards a head gasket???
https://www.napaonline.com/Catalog/C...006_0282509199
Or just put the money towards a head gasket???
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09-22-2011, 11:45 PM
#25
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Join Date: Sep 2010
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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.
Seems like it is pointing to a HG leak.Damn I don't want to replace the HG.
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09-23-2011, 10:27 PM
#27
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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10-09-2011, 06:31 PM
#31
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.
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.
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.
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.
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.
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.
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10-28-2011, 03:44 PM
#33
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
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
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10-29-2011, 09:34 AM
#35
Good news! I'm going to leave everything alone and test alpha 15 when it comes out.
EDIT: There is a sync loss thread over on the Msextra site as well, and it was confirmed that the error can corrupt the PWs. It might be noise from the INJ outputs that is fed back into the system. I'm just glad I wasn't crazy. I guess I got the experience of changing a head gasket 
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
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
Last edited by miatauser884; 10-29-2011 at 09:51 AM.
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10-29-2011, 12:50 PM
#36
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
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
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