Rich mixture
01-20-09, 05:06 PM
#1
Rookie
Thread Starter
Join Date: Nov 2008
Location: PA
Posts: 51
Likes: 0
Received 0 Likes
on
0 Posts
Rich mixture
Hey all,
Question.. I have a '95 SC400 with 85K miles. On start-up, the exhaust smells like there is a lot of gas in the mixture.. As if the mixture is very rich. I drive all highway on my commute. I was expecting to get about 24 MPG, but I'm only getting 20. Since I drive 70 miles each way, that's 7 gallons a day. If gas goes back up to $4 a gal, I'm not going to be likin' the fuel bill.
I've checked the obvious things like tire pressure. The distributer caps, rotors & spark plugs were changed 10,000 miles ago at the dealer.
Is there any adjustment for mixture? I am assuming the ECU makes all of those adjustments.. Thoughts?
Thanks
Question.. I have a '95 SC400 with 85K miles. On start-up, the exhaust smells like there is a lot of gas in the mixture.. As if the mixture is very rich. I drive all highway on my commute. I was expecting to get about 24 MPG, but I'm only getting 20. Since I drive 70 miles each way, that's 7 gallons a day. If gas goes back up to $4 a gal, I'm not going to be likin' the fuel bill.
I've checked the obvious things like tire pressure. The distributer caps, rotors & spark plugs were changed 10,000 miles ago at the dealer.
Is there any adjustment for mixture? I am assuming the ECU makes all of those adjustments.. Thoughts?
Thanks
01-20-09, 05:33 PM
#2
Pole Position
Join Date: Oct 2007
Location: PA
Posts: 358
Likes: 0
Received 0 Likes
on
0 Posts
ECU does make all adjustments...
Do you know the last time your O2 sensors were replaced? Just cuz there not showing a check engine light, doesn't mean they don't need replaced.
Spark plug wires...didn't see you list that
Intake filter check
Fuel filter check
Clogged EGR system
Dirty plugs from rich conditions, even though there 10,000 miles old
Bad grounding cables
Good Luck
Do you know the last time your O2 sensors were replaced? Just cuz there not showing a check engine light, doesn't mean they don't need replaced.
Spark plug wires...didn't see you list that
Intake filter check
Fuel filter check
Clogged EGR system
Dirty plugs from rich conditions, even though there 10,000 miles old
Bad grounding cables
Good Luck
Thread
Thread Starter
Forum
Replies
Last Post
GreggyG
GX - 1st Gen (2004-2009)
13
09-05-13 01:06 AM
Prasha
SC430 - 2nd Gen (2001-2010)
15
11-19-11 12:28 PM
bravonext
LS - 1st and 2nd Gen (1990-2000)
41
08-31-10 08:20 PM
avalon42
LS - 1st and 2nd Gen (1990-2000)
10
01-17-10 08:47 AM