Hard Start issue

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10-23-2014
91 240

3 Attachment(s)

Hard Start issue

This may not be the correct description of what's happening, but the issue is that my car will fire up and then die, or idle very rough (100-200 rpms) and then die. Normally it will take 5-10 attempts for it to run stable.

This isn't a great example, of course things never work like you expect. I took a quick vid, it starts and idles for a couple seconds then dies. Then starts right up.

http://youtu.be/EFO0fg5vF9c

Does anyone happen to know if there is anything that is obvious from my tune?

Any help would be greatly appreciated.

Thanks,
AveryAttachment 47420 Attachment 47421 Attachment 47422
10-23-2014
Cyrperformance

Do you have the MAF codes disabled? I can't look at tune as I'm not in front of PC.
10-23-2014
Cyrperformance

May want to add description of vehicle and modifications as well.
10-23-2014
91 240

Quote:

Originally Posted by Cyrperformance

Do you have the MAF codes disabled? I can't look at tune as I'm not in front of PC.

Yes they are

Quote:

Originally Posted by Cyrperformance

May want to add description of vehicle and modifications as well.

I guess that would help.

it's a 1991 240sx with a 2001 LQ4 using a 2004 GTO PCM and harness (6spd)
Mods:
4.030" -11cc dished pistons (Wiseco K444x3)
Compstar Rods
Comp Cams 232/240 (.595/.608) 115 lsa
Patriot performance Gold dual springs
Stock 317 head castings with 5 angle valve job
Siemens 60lb injectors w/ Greg Banish data
Bosch 044 external pump
Aeromotive 13101 regulator (58psi)
LS6 intake
2 bar GM map sensor (12580698)
76mm Turbo

That should be the jist of it
10-23-2014
Cyrperformance

The codes should be set to MIL ON FIRST, not no error. Again can't look at tune just throwing out suggestions of having the same issue. If the PCM doesn't see there error it doesn't go SD
10-23-2014
Cyrperformance

Also post a log of it happening.
10-23-2014
91 240

Quote:

Originally Posted by Cyrperformance

The codes should be set to MIL ON FIRST, not no error. Again can't look at tune just throwing out suggestions of having the same issue. If the PCM doesn't see there error it doesn't go SD

they are

http://i18.photobucket.com/albums/b1...ps573b433e.png
10-23-2014
91 240

Quote:

Originally Posted by Cyrperformance

Also post a log of it happening.

log, tune and config are in my original post
10-23-2014
Tim_P

2 Attachment(s)

Attachment 47428 Is it ok to have 0's in here?
Attachment 47429 Never seen someone calling for PE that quick:D

I'm no expert by far, but here are a couple of things I noticed that do not seem right to me. Maybe somebody with more knowledge will chime in.
10-23-2014
Cyrperformance

No PE should come in around 55KPA in N/A if I remeber correct and the table should call for desired AFR such as 1.17 = 12.5 roughly if stioch is 14.68. I believe with everything 0 it would call for PE immediately and could be part of the issue.