Got a few codes.

[riselly1]

Hello, my name is rick and I am new to the ZR-1 LT5 world. Let me just say i was a little wairy when i purchased my ZR1 back in march but after the first drive i was hooked and do not miss my 996 at all, this thing just rocks !! http://zr1.net/forum/images/smilies/eusa_dance.gif

Anyways, I have put a little over 2K miles with no issues but just yesterday my Z seems to be feeling a little sick. It sat for about a week and when i started it i noticed a fluctuating idle that looks like its about to quit but the car saves it, sometimes it does stall but i can start it right back with no issues. heres the list of codes i pulled.......

12
13: Left oxygen sensor open
14: coolant sensor high temp
21: throttle position sensor high TPS
22: throttle position sensor low TPS
23: manifold air temperature MAT temp low
41: cylinder select error
42: electronic spark timing EST system error
43: Electronic spark control ESC system error
34: mass air flow sensor low MAP
33: mass air flow sensor high MAP
32: EGR system failure ???
31: Cam sensor missing or too many pulses
12

http://zr1.net/forum/images/smilies/icon_cry.gif

As i said before the only thing differently was it sat for a little longer than usual and HAD to put some of that cheap "Westar" gas instead of SHELL. Also when i purchased the car it came with the secondary port throttle vacuum unplugled and the car refused to go past 140. I have plugged it in since but have not done another fast run so idk.


Any advise fellas??

[Kevin]

I've never seen that many codes in even the worst maintained car. Reset the ecm, go for a drive and see what comes back

[G8nightman]

Second Kevin's post.


Sent from my iPhone using ZR-1 Net Registry

[gbrtng]

Looks like your ECM pooped the bed - try to locate a loaner replacement to swap in.

[A26B]

I think you may have a lot of stored codes, agreeing with Kevin. Disconnect the battery for a couple of minutes, drive it for awhile, then check to see what new codes are set, if any.

FYI, if you have multiple codes, always start diagnostics with the numerically lowest code first. Resolving the numerically lowest code first will most likely take care of the others as well.

[riselly1]

Hey ladies I took a little longer to respond than expected. I tried a few combinations between "good" and bad gas, resetting the computer before, during and after and this is what I currently have:

Good news; the codes are gone. I now have code 44 and 54 for the tire pressure monitor. And service engine blinks 12 only

Bad news; while idle is steady during hard breaking the car stalls or wants to quit with mild braking. Power isn't always there, and I feel like it back fires a little when off the gas. Tried with power key on or off.

Sounds like a vacuum doesn't it??

[We Gone]

Congrats on your ZR-1 I hope that you get everything taken care of.
Just out of curiosity what year?

[riselly1]

Hey thanks ! Its a 91 burgundy with 34k miles on her.

[We Gone]

IAC may need to be cleaned, You need to put it on a scanner it could also be a lazy O2 sensor or TPS. A scanner would point you in the right direction.

[BigJohn]

mouse nest?