I just bought my GN and I’m trying to get everything in order with it. I have turbo link and the first time I tried it turbo link recorded 5 different codes in five different frames. The codes are 33, 44, 34, 45, and 23 reported in that order. The whole run was about five minutes long. What could be causing this? How can I get a better idea of what might be wrong? I know what the codes mean but how do I go about narrowing down the possibilities?
How is your car running? According to tblink not
good. I would suggest trying tblink on someone
else car to make sure it's not your computer or the cable. Check with your local library or get
the Mitchell Service/Repair manual (engine performance).The manual will give you step by step
to chase down the culprits.
Frank
Try this, disconnect battery for one minute. Reconnect and take car for a ride. With key on engine off pin A and B together on the ALDL. You should get a code 12 only. DO NOT cycle the key when A and B are pined, this can blow the ECM. If there is only the 12 you have no problems.
Phil
Does your SES light come on and stay on? If not and you are only getting
MALF codes in single frames, you may have an aftermarket EPROM. I get MALF
codes in individual frames when I use any chip other than my 1987 GM Buick
Grand National EPROM. Car runs fine, no SES light, so I am assuming that
it's some of the altered parameters of the aftermarket EPROMS.
Mark Tonazzi
87 GN Tuned with Turbolink
Walbro 307 Hotwired, 237 Regulator, ATR 2.5 Stainless CAT and Dual Exhaust,
K&N, Thrasher or OEM.
Actually, a couple things...
Shorting the A & B pins won't hurt the ECM. You can even drive the car in that mode (called the BACKUP Mode). The SES light will flash while the motor is running.
Individual bad frames can be caused by a variety of things ...
- weak or intermittent grounds (more and more common as the cars age ... carefully check the ones on the back of the passenger's side head)
- Loose connection at the ALDL
- Laptop in the passenger's seat "wiggling" the parallel port connector (strange but true...drove me nuts on mine once)
- Feedback thru the ECM from a "noisy" electrical interference ... usually from the fan relays
- Grounding loop thru the harness (often times shows up as bad data when you step on the brakes or lock up the TCC)