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Old 12-13-2020, 10:42 PM   #1
KivPanther
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Default Tales of the Falcon

Since I keep posting updates in various threads, I figure I'd just start one here since it never seems to be done and it'll help consolidate helpful replies and such.



The Falcon - 1994 D21 KingCab XE 4x4



DONE!

  • New shocks
  • Replaced ALL fuel injectors
  • Replaced fuel pressure regulator
  • New vacuum hoses
  • New fuel filter
  • New drive belts
  • Alternator replaced with Maxima GXE alternator
  • New plugs and wires
  • New distributor and cap
  • Replaced O2 sensor
  • New Throttle Position Sensor
  • LED bulbs in almost everything
  • Headliner refurbished
  • Steering column cover replaced
  • Rust-eaten hood replaced
  • Cracked side markers replaced
  • Washer Pump replaced
  • New tires
  • Replaced AAC Valve
  • Timing belt and water pump replaced
  • Valve cover gaskets replaced
  • Exhaust manifolds replaced
  • New catalytic converter and cat-back system
  • Sway bar bushings and links replaced
  • Replaced brake rotors, drums, pads, shoes, and master cylinder
  • Leaf spring bushings replaced with polyeurethane
  • New fuel pump and hoses

TO DO!

  • New ball joints and tie rod ends
  • Figure out that intermittant misfire once and for all!
  • Add lift struts to hood
  • Find a non-broken grille
  • Find a brush guard of some kind
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Old 12-13-2020, 10:44 PM   #2
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As for my unstable idle, I tested the IACV and AAC and found them to be within spec on resistance readings. Probably need to get them off to clean them but bolts are a little snug on the IACV and I haven't found where the AAC is actually located yet.
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Old 12-16-2020, 02:05 AM   #3
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Found the AAC (which is in a terrible place). Haven't tested it yet, but probably needs to be cleaned. Anyhoo, I did manage to pick up a replacement washer reservoir w/pump from a 1995 pathfinder. It has the rear pump too but, eh. Guess I have a spare pump now! Also scored an IACV and AAC from the same vehicle since it had the VG30E engine.


Next step is to replace the remaining injectors so I'll have a complete new set and test the AAC to see if I need to replace it. Hopefully this will fix my intermittant misfire/stumble issue for good.
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Old 12-17-2020, 01:46 PM   #4
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I got my grille from rock auto for 40.00 bucks; several years ago; still sitting on a shelf; waiting to install mine after painted; If they do not offer check partsgeek.com.
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Old 12-22-2020, 12:49 AM   #5
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  • Took off my plenum for hopefully the last damn time to replace the remaining fuel injectors. Complete new set now and boy were those old ones filthy and corroded.
  • I also retested my AAC valve since I was under there and found it wasn't working at all. Good thing I sniped one off a pathfinder earlier, even though I ended up having to make my own gasket for it.
  • Four brand new tires. Amazing how much that can change your ride!
  • I'm getting the dreaded turn clunk, so I guess I need new spring bushings soon. Adding that to the list.
Still need to test the engine under load to see if that finally gets rid of my intermittant misfire problem. That's for tomorrow!
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Old 12-23-2020, 10:38 PM   #6
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Sidelined by a dead cylinder bank. Diagnosis pending.


http://www.infamousnissan.com/forum/...ad.php?t=44977
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Old 12-29-2020, 08:39 PM   #7
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All cylinders firing normally. Suspected problem found, fixed, and pending testing. Here's hoping!


EDIT: Seems to do just fine! Back on track with the other fixes!
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Old 01-04-2021, 12:21 AM   #8
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Going to send her in for a timing belt job and hopefully get the harmonic balancer put back together right so that I don't have to kentucky windage the timing anymore. She's running rich at the moment with awful gas mileage (11-13 range) but I'll start working on that once I get the timing right.
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Old 01-04-2021, 03:47 AM   #9
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For the awful fuel mileage. Connect a code reader that shows Live Data and check the fuel trims. Check Short Term Fuel Trims and Long Term Fuel Trims. It's a great tool for diagnosing lean/rich fuel conditions. I went through horrible fuel mileage earlier this year. 14 gallon tank of fuel and driving steady at 65mph until the tank was empty netted me only 130 miles! I should be getting 330 miles! Found an exhaust leak and loosened and torqued down all the exhaust stands and nuts and checked the gasket too. Also removed the intake manifold and checked the gasket to be sure. Torqued all bolts down to specs and BAM! Fuel mileage was MUCH improved. But not perfect. Was getting 200 mi. per tankful. Did more checking and improved mileage to 300 mi. per tank now with a new upstream(exhaust manifold) Bosch 02 sensor. So worth looking into this feature.

Lots of videos on YouTube on this subject to help detect sensor component operation and if there are intake and/or exhaust leaks which would tell your ECM to give more/less due injector time on/off.

https://www.youtube.com/watch?v=5WnM_NsOtd8

https://www.youtube.com/watch?v=FP3bu3UBz5k

https://www.youtube.com/watch?v=oRX2V6_a3dc

Just to get you started on fuel trims...
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Old 01-05-2021, 02:07 AM   #10
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I don't think my '94 has a port capable of giving me those kinds of readings unless I'm much mistaken. Also, did you ADD an O2 sensor upstream? The VG30E only has a downstream one stock, which I've already replaced.


I DEFINTELY have new exhaust on my to-do list, however. The stock exhaust is a bit rough looking, if serviceable.
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