XtreemeChaos

My car is currently in the body shop getting fixed from getting the front bumper ripped off by a semi. It's been sitting at the body shop for about 4 months while I fought with the insurance company and waited for parts to come in and for the body shop to get me scheduled.

The car was running fine when they finally got to work on it about 2 weeks ago. Late last week, it wouldn't start for them. Their service manager looked at it and thought it was the fuel pump. I was planning on changing it out anyways, so I ordered a Racetronix kit. When I pulled the old pump, the feed hose was cracked, so that was probably the reason for the low fuel pressure. After changing the pump, the car still won't start

I hooked up EFILive and there were some codes:

B1001 H
U1000 H "Class 2 Data Link"
U1016 H "Lost Class 2 Communications with Engine Controller - Device $10"
U1096 H "Lost Communications with Driver Information and Displays Controller - Device $60"

I cleared the codes and U1016 came back just from cranking the car. It will crank over fine, fuel pressure should be fine (need to get a guage to make sure though), and it seems to be getting spark.

Any ideas what could be wrong? I need to get it running ASAP so the body shop can finish up the work on it.

foff667

iTrader: (2)

sounds like it might possibly be a VATS issue of some sort.

XtreemeChaos

I dont' have any tuning software handy atm. Are there any pids I can scan to see if VATS is disabling fuel flow or spark?

XtreemeChaos

I took some scans while cranking it tonight. There were PIDs that showed whether VATS was killing spark or fuel and they were both set to false, so that's not the problem.

Base spark was 13 degrees, does that seem a little low to anyone? Commanded AFR was 3:1, and fuel pressue (manually checked) was 50-60 peaking around 85.

There were quite a number of RAMFAIL_DMA Counts even though they aren't showing in the logs. Could this mean that the PCM is going bad?

Also had some new codes pop up:

C0237
C0240

Anyone have any ideas?

XtreemeChaos

Here are the efilive log files if anyone wants to take a look.

joecar

Your commanded AFR is 3... that's too rich... can you smell gas...?

What is the ambient temperature there...?
What does ECT read on the scan tool...?

Your cranking RPM barely hit 100 RPM... that's too slow.

Does the battery have enough charge...?

Did the battery get disconnected while the key was on...?

Did the PCM get removed/replaced...?

Did the PCM get removed/replaced while key was on...?

Did you actually test for spark during cranking...?

Do the injectors fire during cranking...?

XtreemeChaos

Yeah, but I thought that was because of me pumping it.

Ambient temp was in the mid 40's F today, ECT only got up to about 50-60 F from cranking it.

Battery went dead from the doors being opened while they were working on it. All the logs were taken with jumper cables attached to our Trailblazer with it running.

Not sure, its possible that they may have while they were fixing the frame.

It shouldn't have, the major damage was the front driver side corner.


Yeah, unplugged the front 2 on the driver side and made sure they were giving off spark


Didn't check that. I'll try that next time.

Thanks for your help. Think the tune could have somehow changed while sitting for so long. Should I try re-flashing it to see if it fixes the commanded AFR being 3?