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Went to pull out in in traffic rather fast and my car bogged on me. It hasn't been running the same after. It will bog on accelleration from the light and the battery meter swings wild back and forth. Battery tested good.

Codes are for an 89 model SE.

13 Oxygen Sensor Circuit( Open Circuit )

26 Quad Driver Circuit

34 Mass Air Flow Sensor Circuit

44 System Lean

Looking for help on how to go about tracking down this issue. New to the car.

hi, please try unplugging the MAF sensor and see if it improves

If unplugging the MAF doesn't turn up results, do the same with the O2 sensor. Sometimes those cause things to act up.

Sorry for the late reply. Unplugging the MAF didn't do any better. Where can I find the O2 sensor? Thanks!

Found The O2 Sensor and unplugging it yielded the same results. It still surges.

I'll take a shot in the dark, and suggest to check your harmonic balancer for rubber separation. Keep us posted!!!

bogging engine?-- may be good idea to check fuel pressure and filter if you havnt already?

Oh and while reading up on this quad thing, I found this- it seems to fit well with the fluctuating voltage

DTC 26 refers to a quad driver module fault. The quad driver is a "safety valve" for the ECM controlled circuits. The quad driver controls up to 4 circuits. There are multiple quad drivers in the ECM. The QDM shuts down a shorted circuit to prevent high current flow from damaging the ECM.

maybe someone who actually knows what thisis can help you

thanks....

SouthernBonne wrote: It will bog on acceleration from the light and the battery meter swings wild back and forth. Battery tested good.

Just so you know, the "battery meter" is actually showing you how many volts the alternator is putting out.

Codes can point you in the direction of a problem but often don't pinpoint it.

The very first thing I would do is to check all of the ground connections, the connections to the ECM and the wiring & connectors for the sensors that codes were set for, as well as the battery connections.
There are plenty of possibilities--some cheap, some more expensive--like a failed ECM.

It wouldn't be first on my list of suspects (wiring and ECM are) but it could be a bad alternator---and many places like autozone do free charging system checks.
A bad alternator will wreak havoc on the way the car runs.
If it is alternating between overcharging and undercharging, the voltmeter would swing wildly.
It's also possible that the alternator is OK and the voltmeter is swinging back and forth as the rpms drop and then increase, as the car fights stalling out.

Check all of the vacuum lines to see if any are cracked, loose or disconnected, etc.

A fuel pressure test would also be another thing to do. If the fuel pressure is too low, it may be the fuel pump or the fuel filter or fuel pressure regulator.

Check the oxygen sensor and MAF sensor connectors, as well as the sensors themselves.
Many test procedures can be found here: http://easyautodiagnostics.com/gm/3.8L/ ... f-sensor-1

Hope this helps and I hope you let us know what resolves the problem.