Low/barely any 02 sensor voltage, fuel problem?

[dGilmour]

I am getting little to no voltage coming from my brand new Mopar o2 sensor on my 89 2.2 Shadow. I noticed once, one day, I started my car and the Dawes never lit up, ever. Eventually, after trying a new sensor, I figured maybe my harness wires might be bad, so I made my own direct wires for the sensor ground (this is a 4 wire, by the way), heater ground, and sensor signal. I've checked it dozens of times- there CANT be a wiring problem. I'm obviously getting a code 51 from this (02 output indicates too lean too long).

This problem has of course truly destroyed my gas mileage and efficiency, and is costing me quite a sum.

So, my question is, could low fuel pressure be a cause of such symptoms?

I checked my fuel pressure, and it does seem a little low on most tests- for example, if you pull the vacuum hose off the FPR and open the system, I get low 50-51 psi, as opposed to the normal 55 psi. At idle my pressure is a few psi lower than the normal. Could these numbers really cause this problem?

I'm going to swap out my FPR, put in a new fuel filter, and take more accurate readings of FP and post again. Any advice or suggestions is MUCH appreciated, I really need to fix this problem ASAP.

[mpgmike]

Are you adding acetone, touleune (sp?), alcohol, naphtelene (sp?), Marvel Mystery Oil, and cat urine to your tank as an octane booster? What I don't get is that (I believe you're the one I responed to previously) you have to be poisoning that thing somehow. You said you did an environmental analysis for chemicals (wrong RTV, chemicals in the garage, etc.) and came up blank. I've seen your problem before and it turned out to be something of that nature. You need to find what is poisoning it, period. Especially since you are hooked directly to the output wire, it really shouldn't be a wiring issue. Something poisoned it, Watson.

mpgmike
'88 Daytona Shelby
'91 Spirit R/T
'84 Rampage

[dGilmour]

Not adding any sort of chemical of any nature- Simply 92 octane straight up gas.

I'll still look for those things. Thanks for the suggestion.