1989 Nissan pathfinder. 6cylinder - VG30i - Manual trans
Engine was misfiring (running okay but putt, putt, putting) so I pulled be plugs to check for signs. Other than wear and wide gap the plugs looked okay, but I installed new plugs as they’re cheap and I was already pulling them. I replaced them one at a time so didn’t mix up the wiring. I went to restart the engine and now it turns over and starts but then immediately dies. If I really slam on the pedal I can get it to rev up a couple times, but it really wants to completely die right away.
It’ll start but won’t run
–Side notes and thoughts–
- I took the battery lead (neg) off for a few days - maybe that reset something?
- I had a very empty gas tank - so low that I thought it might be out of fuel. I put two gallons in just to make sure. Because I can slam on the gas and get it to revving I’m not sure being out of gas is the issue.
- I removed the distributer cap to check for wear but reinstalled (picture attached).
- I sprayed some Mass airflow sensor cleaner into the throttle body to clean up, the throttle body valve blade was pretty clean.
- I’m doing this test without the air filter in. The old one was so dirty I removed it and didn’t bother putting it back on. Going to buy a new one today.
- It cannot pass smog due to this misfire (obviously not detonating fuel so it’s polluting)
- The engine was start up readily before I started tinkering. It would seem strange that adding new plugs
- I didn’t gap the plugs.
Look for any wires knocked loose or hoses disconnected.
Pull the error codes (check engine light is on cuz, it’s uhh not running)
Check Vacuum and diagram and hoses.
Check ignition system wires.
Check fuel pressure.
Check Cylinder Compression.
Ultimately I’m trying to tune it up (and fix misfire) anyway, not just change the plugs, so doing more diagnosis is okay. It’s also not my primary car. I haven’t worked on cars in a while so I’m a little rusty and also needing to get necessary tools to complete the tasks. But it’s fun I hope I can get this car running well again soon.
If you have any insight I would really appreciate it.