Factory set is fine if you want to keep
it factory.....but from what I know the 7M didn't come out with 550 cc injectors
or the Lexus AFM, not exactly keeping it factory.....
Hunt
----- Original Message -----
Sent: 24 December, 2003 3:48 PM
Subject: [sconz] Re: Lexus Mod Problem
When I back off the
throttle in my car the af guage whacks round to rich then drops off the
scale.....does it really matter how lean it's running when you're decelerating
or does it?
Regards,
Jonathan
ps - Hunt, just because
there are adjuster screws doesnt mean they should be played with...FACTORY SET!!
That's why they usually have a metal cap on them you have to break to get to the
screw.
----- Original Message -----
Sent: Wednesday, December 24, 2003 3:19
PM
Subject: [sconz] Re: Lexus Mod
Problem
Unfortunatly I don't know what could
exactly be causing that but all I can say is WOW THAT IS LEAN!!!
But yes do check for vac
leaks.
Is there an adjuster screw on the lexus
afm?
Hunt
----- Original Message -----
Sent: 24 December, 2003 2:59 PM
Subject: [sconz] Lexus Mod Problem
Hey Guys,
I have recently fitted 550cc injectors plus a
Lexus air flow meter to my
7MGTE. Before fitting them I checked my
standard mixture with an air/fuel
ratio meter and it was fairly constant
at 14.7:1
Since doing the Lexus mod the upper mixture stays pretty much
the same, the
idle mixture on startup is about 16.5 then goes back to 14.7
after a while.
When throttling off during deceleration the mixture leans
out severely and
goes off the scale (>20:1).
I have checked
heaps of things, changed my AFM sensor, throttle body (had
bored mine out
to 65mm, have reverted to a standard 60mm one now), adjusted
the TPS
position as per TSRM but this has not fixed the problem.
Thought it may
be either:
1. Faulty TPS (when I had it off it seems to spring back
very slowly and as it
appears to be pushed up by the throttle body and
returns by it's own spring I
wondered if it can't close as quickly as the
throttle body)
2. The modified Lexus AFM screw is not long enough (It's
roughly the same
length now as on Reg Riemers article, and it's wound all
the way in)
3. The computer needs more time to learn the new setup.
4.
There's a leak somewhere after the throttle body which draws in un-metered
air after the throttle body is closed and the plenum vacuum
increases.
I don't want to cause any damage to the engine by this
'leaning out', is this
possible on deceleration?
Anyone got any
ideas?
Cheers
Rob
New Plymouth
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Supra Club
of New Zealand
http://www.supras.org.nz/
---
Supra Club of New Zealand
http://www.supras.org.nz/
---
Supra Club of New Zealand
http://www.supras.org.nz/