Notices
86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

90 3vze hesitation/miss :(

Thread Tools
 
Search this Thread
 
Old Jan 4, 2011 | 11:45 PM
  #21  
Ajm1991's Avatar
Thread Starter
Registered User
 
Joined: Sep 2009
Posts: 112
Likes: 0
From: Tucson,AZ
Thanks for the suggestions I looked at the plugs that i had removed a few weeks ago i had COMPLETELY overlooked because i figured they had been in there quite a while and weren't in great shape either way. Upon inspection they are very black and the topmost part is a burnt lighter color. Almost a white. So today i decided to check the new NGK's i had installed on the tune-up and they already look almost as bad! And they're all evenly dark it appears. They also seemed wet and wreaked of fuel. Reminds me of a fouled plug in my old 2-stroke dirtbike when i ran a richer oil/fuel mixture.
Reply
Old Jan 5, 2011 | 12:04 AM
  #22  
Ajm1991's Avatar
Thread Starter
Registered User
 
Joined: Sep 2009
Posts: 112
Likes: 0
From: Tucson,AZ
Excuse the crappy cell pic
Attached Thumbnails 90 3vze hesitation/miss :(-sp4.jpg  
Reply
Old Jan 5, 2011 | 04:16 AM
  #23  
TNRabbit's Avatar
Contributing Member
 
Joined: Apr 2006
Posts: 4,787
Likes: 36
From: TENN Native Languishing in Virginia
It's quite apparent you're getting rich fuel mixture.

If you haven't done so, I'd definitely install a new O2 sensor. It won't code, but a bad one can drop your fuel economy by 3-5 mpg.

After that, I'd check for: 1) stuck cold start injector or 2) sticking injectors on the rail. Also check your VAFM.
Reply
Old Jan 5, 2011 | 05:28 PM
  #24  
Ajm1991's Avatar
Thread Starter
Registered User
 
Joined: Sep 2009
Posts: 112
Likes: 0
From: Tucson,AZ
Thanks for the reply TNRabbit I will buy a new o2 this friday. The 1 thing that sorta steered me away from trying this first is i read that the ECU only uses the o2 while in closed loop (i might have this backwards..) so basically it isn't utilized until its warmed up. My issue is from the time i start it in the morning till i shut it down for the day. Tho while cold it hesitates VERY badly, if you even blip the throttle without warming up more than 2-3 minutes it acts like a carburator with a bad accelorator pump. Just falls on its face then sorta breaks thru it until you return to idle again.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
MadMax48
86-95 Trucks & 4Runners
16
Mar 3, 2020 10:33 AM
Kamaloha
86-95 Trucks & 4Runners
1
Oct 16, 2015 05:13 PM
alexcarey
84-85 Trucks & 4Runners
21
Oct 14, 2015 06:05 PM
Matthew Perez
86-95 Trucks & 4Runners
9
Sep 28, 2015 05:43 PM




All times are GMT -8. The time now is 03:57 PM.