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Thechrisleonard
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Last seen: 1 month 1 week ago
Joined: 03/08/2018 - 10:34
DBW and Hot start issues

I have a coyote swapped mustang with the infinity standalone harness and computer. When driving the car i will get a fail on the DBW causing it to go into safe mode and hold an idle at 1400 RPM. I have tried swapping throttle bodies and still have the same issue. It will reset when shutting the car off and turning it back on and usually lasts 5-15 minutes until i get the fail again. Is there a way to adjust the fail set points to have this not come in? The throttle seems to operate perfectly then just randomly shuts down. Logs for this are in the file labelled Dead2 and the issue happens around time 1:20.

 

When the car is hot it does not want to start. I can leave the car for about 20 minutes and it usually starts up. It looks like there are VCT fails that come in that cause it to not run but i have the VCT disabled and the cams locked out due to other issues i had with controlling the VCT with this computer. One time the car seemed like it was not going to start and the log shows that one of the cams switched to -200+ degrees then the car fired right up. Is there any way to disable the VCT fails when the VCT is not enabled? 

 

dead2.itlog

dead2.itssn

 

sllow start.itlog

sllow start.itssn

 

wont start 2.itlog

wont start 2.itssn

digitalsolo
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Last seen: 1 month 2 days ago
Joined: 12/28/2016 - 08:31
Gah, forum ate my post. 

Gah, forum ate my post.   Dangit.

Okay, here goes (again):
1.  It looks like you need to tune your bias tables and PIDs for the DBW.   Are you running the out of the box settings?   Looks like it.   Your commanded and actual don't track very well.    There are some good videos on this (not mine) here:  https://www.youtube.com/watch?v=xFIZ4J08G3o&t=3s (part 1) and here: https://www.youtube.com/watch?v=wGw5zgL1-_4&t=579s (part 2).   Basically you need to get bias as close as possible than use PID to dial the response in.   You need to do the same with cams, but if you locked them out, that's a non issue.

I'll look at your timing stuff in a moment...

digitalsolo
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Last seen: 1 month 2 days ago
Joined: 12/28/2016 - 08:31
On the hot start;  it looks

On the hot start;  it looks like its failing to read your cam1;  I believe that's passenger bank exhaust cam, which is a VR sensor.   Data looks good once it comes in, and if it only does it hot, I'd think you perhaps either have a sensor going a little wonky or a wiring issue of some type.   Is this a FRPP harness, or?

I can send you my tunes for reference if you want, I've got a Coyote on a 710 box (96.1 firmware currently, long story).   Ford DBW, spinning all 4 cams, etc.   The tune won't help much (I'm twin turbo) but the DBW settings might be worth looking at for you if you want, I have about 4 hours into dialing it in for good behavior.   FWIW, I have a GM (CTS) DBW pedal, the the TB is just a Ford unit, so the settings should be the same.   I've never had any VR sensor issues on the cams though, so I can't speak to that one, those should "just work" especially if they work cold.

TMScrogins
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Last seen: 4 weeks 1 day ago
Joined: 08/06/2015 - 08:38
Thechrisleonard,

Thechrisleonard,

The videos digitalsolo linked for you are mine. I agree with digital's sentiment on your DBW. Are you running a stock throttle body? Did you calibrate your throttle body? If you have a healthy battery then I would almost bet if you go through Part 1 for sure and maybe part 2, that your tracking errors will be remedied. One other question though. Are you running an automatic transmission? I ask because if you are running a trans controller, some of them require you to tap into the TPS signal. This has been known to cause a difference in voltage and/or resistance between the primary and failsafe circuits. When those circuits fall too far out of sync, the DBW system will go into failsafe. If you are running a manual transmission, then disregard this comment. If you are running an automatic, then let me know, and I can help you through a fix. One other note. Make sure you have a good battery. A weak battery can cause all kinds of problems with the DBW circuit. I noticed in your Wont Start 2 log that during crank, you are dropping below 9V. Also, during crank you are triggering the DBW failsafe error. It could be because of a weak battery. One last comment on your voltage - You have your alternator regulated to about 13.5v. This is right on the edge of where the ECU likes to see as minimum voltage for the DBW circuit. I run my Coyote engines at about 14.7v on the charging output. Your LS_0 table is currently set to 50% duty. 35% will move the regulated charging output to about 14.7v.

As for the cams, did you sync them? If not, do so. As for your hard start, you are not reaching sync state so it won't fire. I really don't think you have a cam issue thoug. There are several things going on here that I see in your datalogs. In all data logs, you have extremely low fuel pressure. On the running log, I noticed your injector pressure is only about 19-23 psig. This should be much higher. Your fuel pressure is defaulting to 12psi as a failsafe as set up in the wizard for your fuel pressure sensor as the override should you have sensor failure. It appears either you do not have a fuel pressure sensor installed, or it is erroring, or it is not being fed into the ECU on the signal line. Do you have a regulator and can you verify how much fuel pressure you are running? You should be at 55-60psi static. I noticed that you have your regulator setup for Atmospheric Reference. Make sure that you do not have the reference line port capped or plugged into vacuum if your are referencing atmosphere.

Personally, I would make sure my fuel delivery is solid before trying to troubleshoot much more. That could be creating a host of other problems, especially on a warm start. The reason it most likely will start on a cold start is that your tune is calling for a 0.20 lambda (very, very rich to help it start when cold). Once warm, startup is calling from 0.70 lambda. Still rich but much, much leaner than a cold start. With the fueling issues I see, I don't think you are getting enough fuel to get the engine easily started. Fix your fueling problem, and your warm start issues will likely go away. With only 12 psi on injector pressure being called for on start, I'm sure it is starving to start. If you wanted to test this scenario under warm start conditions, simply change the 0.70 value on your Lambda Cranking Table on your Start tab to 0.20 in the warmer temperatures. Or go into your Wizard under basic sensors and change your failsafe override from 12psi to say 50+ psi. 

Post back to let us know how it goes.

TMScrogins
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Last seen: 4 weeks 1 day ago
Joined: 08/06/2015 - 08:38
One other question. Is your

One other question. Is your Coyote a Gen1 or later engine? I don't think the Infinity can control Gen2 or later cams on the Coyote. I think you would have to run Phaser lockouts in that case.