3VZ-E rich idle, poor mileage
#1
3VZ-E rich idle, poor mileage
My '94 4x4 truck (3VZ-E, A340H) generally runs OK, but it idles just a bit rough, and the mileage has gotten even worse than usual (~13, instead of the usual 15-16. I'm the orig owner). A couple of times the I've gotten a code for rich mixture. It starts fine, and out on the freeway does OK on gas (~19, OK, I know, but it is a 3.0). One possible clue is that if I'm accelerating slowly from a stop, at about 2500-2800 RPM the power noticeably increases, as though the mixture is correct above that RPM.
The oxygen sensors were recently changed.
Any ideas? Thanks in advance.
The oxygen sensors were recently changed.
Any ideas? Thanks in advance.
#3
Registered User
Join Date: Dec 2005
Location: Atlanta, GA.
Posts: 189
Likes: 0
Received 0 Likes
on
0 Posts
he changed the O2 sensors...
Is the code for a knock sensor flashing as well? The KS wiring harness never last more than 150k on the 3vze... try also using premium, and some Lucas on your next oil change... new plugs might help as well
Is the code for a knock sensor flashing as well? The KS wiring harness never last more than 150k on the 3vze... try also using premium, and some Lucas on your next oil change... new plugs might help as well
#4
Contributing Member
also check your passenger side plug wirs and look at the mounting point for the rear most wire and make sure it did not ground out and burn thru. Thats a common thing if your plug wires were changed and that wire was not tied up if the original wire mount was broken during the wire change.
Thread
Thread Starter
Forum
Replies
Last Post
Blamalam
86-95 Trucks & 4Runners
22
03-12-2022 07:34 AM
Blamalam
86-95 Trucks & 4Runners
0
08-16-2015 12:29 PM
tinigunner11
95.5-2004 Tacomas & 96-2002 4Runners
4
08-14-2015 01:19 PM