TwinTurbo.NET: Nissan 300ZX forum - FML - time to take it a mechanic
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Subject FML - time to take it a mechanic
     
Posted by moxie (SF) on September 22, 2019 at 7:45 PM
  This message has been viewed 192 times.
     
In Reply To Well, this sucks posted by moxie (SF) on September 16, 2019 at 04:00 PM
     
Message Somehow I made this worse. I fixed the timing and set it to 15 degrees TDC, ran the old gas out and replaced it with fresh gas, fixed a few small vacuum leaks, and replaced my Iridium plugs with PFR6B-11B gaped to .037" for 12PSI and got the cats nice and hot right before the test.

I'm at a loss here. The only thing I didn't replace was the TPS, but my car is making gobs of power and sounds phenomenal, so I didn't touch that, not sure if a bad TPS would cause these results, that, and the factory cats, but they have been sitting since my last smog and I passed with them, so I don't think they are bad, but not sure what else it could be. Leaking o-rings for my injectors? (I don't smell fuel). Bad wiring harness? It's brand new though, and I don't have any codes.

Anybody got anymore thoughts besides me throwing in the towel and taking it to somebody?

HC
1st Test
15mph - max 59, meas 146 <== fail
25mph - max 34, meas 80 <== fail

2nd Test
15mph - max 59, meas 171 <== 25 worse, fail
25pmh - max 34, meas 100 <== 20 worse, fail

CO
1st Test
15mph - max .34, meas .34 <== pass
25mph - max .32, meas .10 <== pass

2nd Test
15mph - max .34, meas .52 <== .18 worse, fail
25pmh - max .32 meas .19 <== .13 worse, pass

NO
1st Test
15mph - max 484, meas 1167 <== fail
25mph - max 498, meas 159 <== pass

2nd Test
15mph - max 484 meas 1212 <== 45 worse, fail
25pmh - max 498, meas 202<== 43 worse, pass

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