jssblues

when very slightly accelerating"such as being behind some old schmuck" it gurgles or hesitates and i cant figure out why

jssblues

and that is at any r.p.m.............when i give more throttle it runs just fine, but it is embarrassing when in town just cruisin and it sounds like my car is missing real bad

Joel5.0

OK..... you need to concentrate on the symptom and the possible root causes, code 84 or an EGR delete are NOT in the possible causes list, so discard them.

Suggest to go over the KISS items.... initial timing adjustment, any other failure codes showing?.... lean, rich?...... connect a vacuum gauge to an intake port and check vacuum engine idling, run a cylinders balance test, fuel pressure is?

jssblues

when barely giving throttle i have a massive stumbling hesitation.....the only codes i am getting is 84

jssblues

koer gives code 92,so i switched 02 sensors and get 42........so i go buy a new sensor and replace one and still get 92, so i then swap sensors again, and i get 42 again......does not make sense

Joel5.0

Again.... did you replace the correct side? 42/41 = passenger side and 92/91 = driver's side. If you switched from driver's side to passenger side and got 92, the driver's side is the one that needed to be replaced. You also need to to make sure tests are repeated to confirm results.

You also need to check non-EEC areas that affect A/F control...... what's the fuel pressure? .... PCV valve not clogged? ... vacuum lines OK? .... MAF sensor clean? ..... initial spark timing is set at ? Suggestion, instead of trying to "fix" the problem by trying to ID what needs to be replaced, concentrate on doing the tests/verifications required and posting the results, it will provide us with the data to help us, help you (PI). And keep it in one thread.....

jssblues

i checked the voltage of the 02 sensors at the computer, one side reads .02 volts at idle and the other side reads 12-13 volts....what the hell is going on????

Joel5.0

You have three wires.... one is ground, one is 12 vdc IGN ON and one for the signal. The first two wires are for the heater element inside the O2 sensor, the other one is the signal wire. Ignore the SIGRTN terminal in the pic below, the other three are common wires of 3 and 4 wire HEGO's.



You may want to read some info regarding O2 sensors here.

jssblues

i was told to check volts at computer.....pin 29 shows 12 volts....pin 43 shows .02 volts

jssblues

pin 29 shows 12 volts at computer when i turn on the key