I have a '91 Tracker which was available with either ECU/fuel injection or carb. Mine had the injection. The injection model had a cat, the carb model did not. When replacing exhaust, I put the carb model exhaust on (it was 1/4 the price). I'm not a mechanic, and didn't know anything about ECU adjustment for running car without cat or anything like that. I don't do inspection here, so don't know about exhaust gas, etc. However, my Tracker never ran any differently, still gets 25/32mpg, etc., has same power, etc. I know the other more knowledgeable people on this forum do not recommend running the Tracker without the cat with the ECU, etc., but I never noticed a difference. There is a recent post about the same issue...query it and you'll see the arguments against doing this.
yours my have an older ECU?
some years, do in fact not have EGR tests .
starting in 91 , it was lax, then as each year proceeded it got harder.
and all calif versions are real strict.
there are vast numbers of ECU's for 16v motor (WW) and which one you have is any wonder.
there are some Canadian ECUs that do not have code 51.
And other makets too, E01 , runs with out cat or EGR. (E01 = pure jap generic market code, whick i call a SLICK)
I have an 91 8v ECU that does not throw code 51.
YMMV.
I mean your EGR may vary. YEMV ! haheheheheh
your 94/95 will for sure not like it (if you had a 95) because they adopted the Calif. rules in 94 ECUS.
the fed cars , adopted the Calif rules for EGR. sad but true.
as you see it is complex.
oh, sell me your ECU , please.. I just have to have it. !!!!
oh, sell me your ECU , please.. I just have to have it. !!!!
you lucky dog.
No, no, no. I have dibs on the ECU. I think you already have a spare (as per your posts of last year!!) And probably know how to build one from scratch anyway (cardboard, wire, new capacitors....)
no but I do wish i could Flash program the ROMS so i could , delete the code 51 , monitor.
then we could retune the ECU for any VE . (VE is how well motor pumps air)
be nice to have custom exh. with any design.
low end torque being top of list.
but, i didnt say that, because i am not here ..... run black helocopters.
I have a 92 8v tracker someone took the cat off and put a generic muff in its place. Sounds like crap exhaust stinks totally bad with back winder down, but no difference in mpg. The older model vehicles needed back pressure to run correctly but not the case here..
Quote:
Originally Posted by Milwaukee
I decide I want remove cat.
It make LOT heat under my foot.
Plus it make frame rust faster due water on frame and cat heat it.
I been get 30.5 mpg stay 60 mph but I was wondered if I can remove cat.
I want but I read info here it claim you remove cat your mpg would DROP FAST like 30 mpg to 20 mpg. And need update ECU.
We have no emission test here. Thank god.
Have anyone remove cat? Did they notice how power there?
actually ,
the oldest dont have the 51 DTC monitor.
every year, in the USA , the Smog,. Monitors ,gets more strict.
my 96 , is very strict. (trip point, = strict)
the 95 and back ECU'S will drop to limphome, which is rich and retard,
it says this in the FSM clear as a bell.
25mpg is min. on my 8v and 30mpg is min on my 96.
if it drops below that, you may have problems.
some folks dont even know car is running open loop then when the EGR fails,
they dont notice the drop.
2 reference points. here.
bad to a little worse. 20 to 15.
and
perfect mpg to poor. 30 to 25
89-98 in usa, all use egr mod valve and a very restrictive muffer would work.
the 99 on they went to ECU direct drive EGR. so no mod valve.
there is no flash kits for old suzuki's and they use EPROM and mask rom and never flash. so they cant be flashed , only a mod kit with outrigger flash. (not easy)
and it has not been cracked yet, fully ,nor any flash upgrade kits. as most other cars have, chevy, ford, and all hondas. ( many, many more)
if you want to tell how yours works, please tell what car you have 92 8v ,says nothing. (ECU or smog wise ,sorry)
what market code.?
or
what ecu you got. PN 56B30 or ? B40 , or what. ( this is what determines action)
and the sticker says "US AT" and US MT, so if it dont say US something, then
it is for another country and has different rules. Diff code, diffr monitors. etc.
every country has different rules for EGR function.
i can only answer for USA, and some canadian models.
and for sure the very oldest Canadians will not get upset with a dead EGR.
if the back pressure is too low, the EGR mod will fail,
in fact it will over use EGR and wreck performance. that is a fact , a mechanical fact.
google EGR modulator and read.
what software you have , is anyones guess. until you look at the back side of ECU.
(top side really)
The USA EPA mandated this action at around after 92, and for sure on the CAL ECUs.
the reason is clearly stated,
to reduce NOX
if the EGR fails, then EPA ASSUMES , NOX is the worst thing that can happen.
so it only has 1 choice , early 90s, and to go rich and retarded.
they took that action and it is on secret.
iN 96 , the Egr BECAME MORE Sensative and trips at the drop of a hat.
but, the penalty (HERE) is far less. my 96 will still run right.
My EGR was broke so long (PO) it was clogged.
after fixing it, (bad VSV) the EGR finially opened up and then guess what.
it stuck open and i couldnt idle car.
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Anyone have remove cat convetor?
No cat
Linear Mode
