Hello Guest
« previous next »
Pages: [1]   Go Down

Carb or Fuel Injection at Altitude?

  • 9 Replies
  • 2077 Views

0 Members and 1 Guest are viewing this topic.

*

Offline BigBearZuki

  • 5
  • 0
Carb or Fuel Injection at Altitude?
« on: September 15, 2012, 10:33:48 PM »
Hello All,
I'm new to zuki's but I'm jumping in with both feet.  Just bought an 86' TT without and engine.  I'm thinking 1.6L 16v MFI... I would think FI is better than a Carb at my atlitude in Big Bear Lake 7000+.  What say you?  Thanks for any advice.  I am used to trail riding on my KTM which is carb'd.

Also, what do you recommend for suspension/lift.  Don't want to break the bank.  Thanks a million! 
Logged
*

Offline Rhinoman

  • 4502
  • 36
  • Gender: Male
  • Bend it, Break it, Fix it
    • Rhinoman
Re: Carb or Fuel Injection at Altitude?
« Reply #1 on: September 17, 2012, 02:23:38 PM »
FI will compensate for altitude, carb may need rejetting.
Logged
2000 Vitara 1.6, 3+3 Lift, 33"MTs, 5:83s, LWB brakes, Winch, Snorkel, Safari Rack
1986 SJ413K PickUp, 1.6L conversion.

OBD1 - Full diagnostics on a PC/Laptop: http://www.rhinopower.org
*

Offline FireCkrEd

  • 246
  • 3
  • Gender: Male
    • My Church-San Pedro Revival Fellowship
Re: Carb or Fuel Injection at Altitude?
« Reply #2 on: September 17, 2012, 06:37:30 PM »
Injection without a doubt, turbo if you can get away with it in Calif...
Logged
93 4dr Kick, stock, + 95 4dr W/TTough kit, Toy axles, 4.24 xfercase gears, 5.71 gears, Ramsey 9500 winch, twin stick xfercase, 33" BFG's
97, 4dr with a 2" lift (needs an engine re-build)
Spirit Filled Christian
*

Offline BigBearZuki

  • 5
  • 0
Re: Carb or Fuel Injection at Altitude?
« Reply #3 on: September 22, 2012, 12:23:35 AM »
Thanks guys!
Logged
*

Offline Derek

  • 63
  • 4
  • Gender: Male
Re: Carb or Fuel Injection at Altitude?
« Reply #4 on: October 02, 2012, 07:54:20 AM »
Just curious is baro/MAP set on the fuel injection computer at key on or is it variable. I know with the boats I work on it sets on key on. this would require restarting at extreme altitude changes.  I only have OBD 1 so can't read much.
Logged
*

Offline talonxracer

  • 1284
  • 34
Re: Carb or Fuel Injection at Altitude?
« Reply #5 on: October 02, 2012, 08:20:33 AM »
The automobiles ECU continually updates the baro pressure, a boat only needs that one time as there is virtually zero altitude change when running on water even when running up-stream in a river.
Logged
Tim "the toolman" Taylor is my HERO !!!

The only GOOD Commie is the commie taking a dirt nap....
*

Offline mrfuelish

  • *
  • 2862
  • 13
  • Gender: Male
  • you must have a perception problem.
Re: Carb or Fuel Injection at Altitude?
« Reply #6 on: October 03, 2012, 07:01:03 PM »
on my 1986 mustang gt it would set it at start and at full throttle only,when I lived in Big Bear it gave me an excuse to clean the plugs once and a while.
Logged
1987,1988,1988,1990 samurai's,  1953 m38a1,  1996 x-90,blue.1996 x-90 red.1994 2 door tracker.   only Dead Fish go with the flow.                No Hairy Nosed Wombats were ran over on the trail today.       My ZUK is Xenophobic.
*

Offline Rhinoman

  • 4502
  • 36
  • Gender: Male
  • Bend it, Break it, Fix it
    • Rhinoman
Re: Carb or Fuel Injection at Altitude?
« Reply #7 on: October 04, 2012, 10:44:56 AM »
OBD1 16V doesn't have a MAP or Baro sensor. OBD2 has a baro sensor and I think a MAP sensor in the US market, as I recall neither are used for fuelling corrections, they are mainly for the EGR.
An OBD1 ECU outputs more live data parameters than a 96/97 does via OBD2 although the OBD1 interface on the 96/97 has much more capability.
On a MAP based system (8V) the baro taken from the MAP at key on and then updated based on maximum or minimum readings, I forget which!
« Last Edit: October 04, 2012, 11:08:19 AM by Rhinoman »
Logged
2000 Vitara 1.6, 3+3 Lift, 33"MTs, 5:83s, LWB brakes, Winch, Snorkel, Safari Rack
1986 SJ413K PickUp, 1.6L conversion.

OBD1 - Full diagnostics on a PC/Laptop: http://www.rhinopower.org
*

Offline Derek

  • 63
  • 4
  • Gender: Male
Re: Carb or Fuel Injection at Altitude?
« Reply #8 on: October 12, 2012, 07:09:01 AM »
Ok since I haven't unplugged the EGR system and still have it capped then it shouldn't even be an issue until I get around to pulling the intake and clearing the ports. unless there is a magic way to clean 3 of the 4 ports. It leans out #3 at idle and when EGR opens up causing it to miss.
Logged
*

Offline mrfuelish

  • *
  • 2862
  • 13
  • Gender: Male
  • you must have a perception problem.
Re: Carb or Fuel Injection at Altitude?
« Reply #9 on: October 12, 2012, 10:26:14 AM »
I thought the egr valve was only to operate or open at cruising speeds, you might have a couple of hose's in the wrong place or a bad sensor?
Logged
1987,1988,1988,1990 samurai's,  1953 m38a1,  1996 x-90,blue.1996 x-90 red.1994 2 door tracker.   only Dead Fish go with the flow.                No Hairy Nosed Wombats were ran over on the trail today.       My ZUK is Xenophobic.
Pages: [1]   Go Up
« previous next »