Help! 1995 Heater problems, body wobble

[Nucman]

Error Code

Thanks Guys, I read my codes this morning. I got a C-12, and H-64 and H78. I dont see any of these codes but the H-64, O2 sensor. I can see that the right bank is running rich, but is it caused by a bad O2 sensor or something else wrong causing the car to run rich ? The only other thing I notice is the cooling fan kicks on as soon as the engine light comes on, way before it should.

 

[Schrade]

You're sure of which module the codes are coming up in? Like oz was saying, some of the same DTC's can come up in multiple modules - 1, 4, 7, 9, DERM, ASR/ABS... I learned about diagnosing the wrong module the HARD way...

 

[vetteoz]

I got a C-12, and H-64 and H78..

H codes are fault codes the ECM has seen in the past but are not currently present ( C codes )

 

[Nucman]

The codes 65 and 78 were in the 4 module. I had no codes in under C, it just came up with C-12 as soon as I turn the key on

 

[Nucman]

Error Codes

Sorry that was a code H64 and H78 in module 4

 

[Schrade]

Do you have FSM? Before turning a wrench, check to see if circuit for 78 is on the same circuit as 64. I don't think they are, but O2 is not a picnic, so confirm that. Rt side harness branches off of main engine harness behind pass side cyl head, along with starter and ECT harness. The O2 connector is attached to the back of the bellhousing, and there ain't much real estate in there to disconnect. Mine was wound up like an Ambassador 5000 with 6lb test Stren, never stopped backlash ad

Bunch more pics of rt side O2 + cat dropping
here.

 

[fastdog]

Thanks Guys, I read my codes this morning. I got a C-12, and H-64 and H78. I dont see any of these codes but the H-64, O2 sensor. I can see that the right bank is running rich, but is it caused by a bad O2 sensor or something else wrong causing the car to run rich ? The only other thing I notice is the cooling fan kicks on as soon as the engine light comes on, way before it should.

i am have the same problem

 

[Schrade]

i am have the same problem

Welcome onto the boards there.

Maybe start a separate thread to get your fix workin' here...

 

[Nucman]

Thanks Everyone !!!

Thanks All for your input on the code 64 problem, it was the right side front O2 sensor, it must be on the same circuit as the cooling fans because after replacing it my fans kick on when they should, and no more rough idle.

Thanks,
Nucman