32valvesftw

So the ZR1 has been acting up, idle speed is variable, but seems to settle down after the car has time to run for a while. BUT on the way to work today she starts bucking and missing at around 4000 rpm and then I get the SES light. In steady state driving she seemed OK.

So using the paperclip method I determined I have a code 31 Camshaft Sensor Circuit OR RR Wheel Speed Sensor Fault. The reason I am bringing the wheel speed sensor into the equation is that when I used the paperclip method, both the SES and Tire pressure monitoring system lights were blinking, but not at the same rate. Also as soon as I jumped A and B the radiator cooling fans came on. Did I do something wrong?
If not where do I look to begin solving the Code 31 Cam Sensor issue?

THANKS

Z51JEFF

It's been awhile but the cam sensor died in my car, code 31 I think and it did the same. Bucked like fuel issue.

32valvesftw

Where is the cam sensor located?

Z51JEFF

On the left side either on the head or the block but it wasn't a pain to get to or replace. Now cost, thats a different story. I think I paid close to $200 for the part.

glass slipper

$199.99 at Autozone...good memory!

32valvesftw

I removed the sensor day but could not find a replacement locally, Although I did not check auto zone, ill do that now. It was leaking and the wires were soaked in oil, I was hoping that cleaning up the wires and sensor would help, but no.

Z51JEFF

Keep in mind that the new sensor is bigger than the old one and the small cover won't fit with the new sensor.

32valvesftw

What do you mean, the sensor has to fit in a hole in the block and is sealed by an oring. If the diameter is too large it won't fit in the hole. Or are saying the shield will not fit.

Z51JEFF

There is a small shield that protects the sensor. When you pulled the sensor out you should have had the pull the shield first. This is 2 pieces.

32valvesftw

Yep, the shield will not go back on without modification. At least changing the sensor cured the code. Seemed to solve a number of issues actually, the idle is steady now and right at 750ish rpm. She seems to run smoother as well. Which makes sense if the ECM was getting an erratic signal from the sensor.

SAM/CH ZR-1

I observed several times by my and customers cars code 31 were set when the alternator was going to die. Check it too.

Sam

32valvesftw

Thanks I lll lok out for that