BillyD Z

What's driving me nuts it that I had good fuel pressure revving it up... Now crap

I have put an multi meter to the water temp sensor and I get nothing. Positive to the sensor and then ground, shouldn't I be seeing some kind of ohms? Is this sensor linked to fuel pressure?

So now before when the car would idea fine and I use to be able to rev it it's starting to stumble in neutral. Ugh!!! I check the fuel pressure gauge and it's only running about 30 psi and drops to 20 when you rev it up... gezzzzz now what??

Thanks S30! I forgot to mention that I did add an inline fuel pressure gauge and she's right on the mark. Also I ran a test on the TPS and that seems to check out ok. I know sometimes that the little silly things could be the root of the problem. I've gone through and checked for air leaks etc. and haven't uncovered anything like that. This is really stumping me!

We have a 1978 280Z all original with only 54000 miles. Runs and idles just fine, starts fine and restarts just fine. You can drive it but once you get up to about 3000RPM the engine starts to cut out and you have to back off the gas. Below 3000 it's just ok enough to get it back home. I ran tests on the AFM and found that is was bad so that was replaced, we replaced the plugs, wires, cap and rotor, fuel filter and PCV valve. I also have a gauge on the fuel line and we have prefect fuel pressure. I have gone to the Datsun Bible and started running other tests and a few that I found a little off was the one that OHMs should be 150 and they are at 170. Also, and I don't know if this is incorrect, but the tests for the air temp sensor and the water sensor. When I preform them both the only FLASH what seems is the correct OHM number, which is about 1950 OHMs. Again I don't know if it should be on continuously OR just give a FLASH of the number. Has anyone else had this similar problem where the car just hits a brick wall at around 3000RPMs? Thank you in advance for anyone's help!!