HELP::::::Heads/Cam car will not run in OL.

[Chalky]

A friend in a 01 C5 added Cam over Winter, 240-244 111+3. The didn't tune but drilled TB and he drove it home with no issues.

We recently added heads bumping compression up. Car runs fine in CL. I sent him an OL file to load which he did. Once in OL car go into red pwr mode with very little driving or RPM. I bumped VE by 20% and actually tried 20% and 100% bumps in C6101. Here are his comments:

I uploaded the latest OL tune, and it didn't even make it a block before it shut me down again. Codes P0103 (MAF - expected), P0500 (VSS...not sure what that one was all about), and of course, P1514. This was the tun file with the C6101 table bumped 100%.

I don't remember gettign a MAF error in mine when I did OL tuning. ALso surpised by the VSS.

Any suggestions?

TIA

[dfe1]

Try the table in this thread and see if it solves the problem.

http://forum.efilive.com/showthread.php?t=5029

[Doc]

The P1514 is definitely the culprit that is putting you in reduced engine power mode. As I understand it, the test is designed as a failsafe for the ETC. There is a percieved difference btw the MAF and MAP and the pcm assumes one or the other is crap and shuts down power to protect the motor. You might as well just max out C6101 for now whislt you are VE tuning. Later when you have that part sorted you can re-map that table to bring back the protection.

[Chalky]

The P1514 is definitely the culprit that is putting you in reduced engine power mode. As I understand it, the test is designed as a failsafe for the ETC. There is a percieved difference btw the MAF and MAP and the pcm assumes one or the other is crap and shuts down power to protect the motor. You might as well just max out C6101 for now whislt you are VE tuning. Later when you have that part sorted you can re-map that table to bring back the protection.

Doc: Just curious but what is max table settings for C6101?

[Chalky]

Try the table in this thread and see if it solves the problem.

http://forum.efilive.com/showthread.php?t=5029

It makes sense. I did a quick look and compared your C6101 table to the one we are using. We may have not raised the cell values in lower RPM/throttle position cells.

[dfe1]

It makes sense. I did a quick look and compared your C6101 table to the one we are using. We may have not raised the cell values in lower RPM/throttle position cells. I'd advise against maxing out the whole table, because that leaves you without any safeguards against an ETC failure. The table I posted works with an LS6 engine with cnc-ported heads, ported throttle body, VaraRam, 232-236 cam, headers, 3" high flow cats, x-pipe and cat-back. Some values may have to be increased for larger displacement/higher horsepower engines, but it shouldn't need too much.

[Chalky]

I'd advise against maxing out the whole table, because that leaves you without any safeguards against an ETC failure. The table I posted works with an LS6 engine with cnc-ported heads, ported throttle body, VaraRam, 232-236 cam, headers, 3" high flow cats, x-pipe and cat-back. Some values may have to be increased for larger displacement/higher horsepower engines, but it shouldn't need too much.

understood. Just curious to know what is considered max values.

[Chalky]

ANy ideas? We bumped timing tables, desired airflow looks OK. Car has drilled TB. Does that make tuning in OL that much more difficult?

Ideas please!! We are sitting in the car waiting for a solution!

[Doc]

I agree with dfe1 about not maxing it out for good. Just to experiment while you guys are in the car right now, select the whole table and put in the largest value you can. If it is too big EFI Live will give you a default max. I don't know right off the top of my head what it is and the missus is giving me a dirty look for me typing this. We are supposed to be house hunting right now. At any rate, find the theoretical maximum to get your AutoVE going and upon completing that reduce the vaules to somewhat more sane types until you get the dreaded reduction again and pump it up a little from there. Don't be afraid. As long as you are monitoring everything in the scanner that test is just irrelevant. Just make sure when you are "done" that you go back and find the sane values for the test to do it's job and not disturb your fun.

Slapped upside the head leaving the door...

[Chalky]

Doc:

We bumped the C6101 table up to the point where we no longer get a red pwr mode. Car still does not wantt o idle in OL.

Any ideas?

[dfe1]

Doc:

We bumped the C6101 table up to the point where we no longer get a red pwr mode. Car still does not wantt o idle in OL.

Any ideas?
Sounds like you have other issues. That's a fairly healthy cam, but still shouldn't be a big issue getting it to idle-- have you adjusted idle speed and desired idle air flow?

If all else fails, e-mail me the .tun file-- digitalviolation at gmail dot com and PM me so I know it's been sent.

[Chalky]

Sounds like you have other issues. That's a fairly healthy cam, but still shouldn't be a big issue getting it to idle-- have you adjusted idle speed and desired idle air flow?

If all else fails, e-mail me the .tun file-- digitalviolation at gmail dot com and PM me so I know it's been sent.

File is on the way. Thanks

[Chalky]

Sounds like you have other issues. That's a fairly healthy cam, but still shouldn't be a big issue getting it to idle-- have you adjusted idle speed and desired idle air flow?

If all else fails, e-mail me the .tun file-- digitalviolation at gmail dot com and PM me so I know it's been sent.

We tied added soem air to Des Air Flow and bumped up idle speed. It took so much throttle input, that we were getting into comm fuel afr of 12.95. KPa was @ 75 to get close to idle. I guess I could have taken 75 KPa column to 14.63 to make it run. Just seemed excessive.

[Thimble]

Sounds like you have other issues. That's a fairly healthy cam, but still shouldn't be a big issue getting it to idle-- have you adjusted idle speed and desired idle air flow?

If all else fails, e-mail me the .tun file-- digitalviolation at gmail dot com and PM me so I know it's been sent.The car in question here is mine. :wave:

The car idles stable at 900rpm in CL. Drivability is great, settles down perfectly into idle at every stop. If it were a mechanical issue like a vacuum leak or unmetered air, I would not expect it to run this good, even in CL.

Following the AutoVE tutorial to put tune in OL, the car won't even attempt to idle, and it's also very evident it's dumping fuel into it like crazy...the car stinks 100 times worse, makes your eyes water it's so strong.

Feathering the gas will keep it running (very roughly and erraticly), but as soon as you let off the throttle, the tach just drops straight to zero. Not even an attempt to find idle with the OL tune. Setting desired speed to 1200, and bumping up desired idle airflow made little if any difference.


I'm still a noob to this tuning software and the tuning process in general, which is why I spent the day at Dave's (Chalky) trying to get this issue worked out. He knows this process a lot better than I do about this stuff...but even he is baffled.

Thanks for any ideas you guys may have.

Tom
:cheers:

[dfe1]

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