Turns over fine.
1/2 tank of gas.
Good spark on the 1 plug I checked. Good spark between distributor cap and plug wires on others.
Fuel pressure is 60 psi just downstream from the fuel filter.
Won't start with starter fluid sprayed in between the air filter and the airflow sensor, or between the airflow sensor and the throttle plate.
Spark plugs are not noticebly wet when I turn it over a few times and then pull them.
Injector coil resistances spec out on the two I tested.
I don't have a scope or a noid light, but with my AC meter I saw some voltage pulsing appropriately from the injector connector.
The Nissan dealer parts guy mentioned a "limp home" mode on the airflow sensor. He said to just disconnect it. No luck there.
Last summer the car stopped starting and I didn't have time to work on it. I took it to a shop and they got it running. They said their $300 injector cleaner service was what was needed. When I asked how it was that all 4 injectors were working fine one day and then the next they were all suddenly too dirty to work at all, they just shrugged. Couldn't explain it. I paid them and off I drove. That was about 9 months ago.
Do the dry plugs necessarily point to a fuel delivery problem? If so, why are all four injectors not working at once? Fuel pressure is high and there appears to be voltage pulsing at the injectors.
Does the fact that introducing starting fluid into the air flow does nothing necessarily point to spark problems? If so, why do the sparks look good at the distributor and on the 1 plug I pulled?
Could be clog in the fuel line up near the fuel rail. If you have fuel pressure tester hook it up while you turn it over. See what it does. See if it spikes (injectors squiring fuel). Also check the intake system make sure it is not clogged either (not sure how this could happen). Check to see if you feel pulses of air coming outta the exhaust, could be a cloged exhaust system not allowing it to exhaust the spent a/f and draw more in.
Uhh... Id say a fuel pressure prob... 60 PSI I believe is just a little much... Possibly a bad fuel press. regulator... Look in a Haynes or Chiltons for proper fuel press. I think this should be @40-45 psi. Dont know for sure.
__________________
****Nothing worth saying or showing****
Could be clog in the fuel line up near the fuel rail. If you have fuel pressure tester hook it up while you turn it over. See what it does. See if it spikes (injectors squiring fuel). Also check the intake system make sure it is not clogged either (not sure how this could happen). Check to see if you feel pulses of air coming outta the exhaust, could be a cloged exhaust system not allowing it to exhaust the spent a/f and draw more in.
Yeah, I was thinking about a clogged fuel rail. That might explain all four injectors not getting gas and how the cleaning stuff the shop shot in there worked for a while, but didn't solve the problem completely. Maybe it's clogged again.
Uhh... Id say a fuel pressure prob... 60 PSI I believe is just a little much... Possibly a bad fuel press. regulator... Look in a Haynes or Chiltons for proper fuel press. I think this should be @40-45 psi. Dont know for sure.
You're right about that spec, but I didn't have a "T" fitting on the pressure guage. So the 60 psi reading was straight out of the fuel filter into the guage. The regulator was downstream and not connected.
I just turned the key, saw the guage go right up, and left it at that, satisfied that the fuel pump was working properly.
I'm going to remove the upper intake manifold and start looking for a blockage near the injector rail.
OK. I gave in a took it to the garage. Flooded. They dried the cylinders out, put some motor oil in them to help with compression, and cranked it for a while with the accelerator floored. Apparently that did the trick. A quick search for "flooded" on this site yeilded others with the same problem.
Linear Mode
