my gas milage isnt so good and when i punch it i blow black smoke out the exhuast. how do i make my car not run so rich? i have an fpr at 21 psi.
also i think my ecu is echipp with one of those cheap ebay chips.

 

Get rid of the Egay chip. And an FPR at 21 psi, is pretty low as is. I think OEM is up at 39 psi.

A tune is probally the only thing that will get your gas milage down. Whats your MPG anyway

 

tune up.

what all have you replaced and not replaced?

read this
https://honda-tech.com/zerothread?id=2194743

 

ok well i have as in the words of upgrade, pulley set, magstar 8.5 mm wires NGK R plugs set at .050 i set my disb in the middle. would more advanced give me more spark better burning the fuel? ok also i have a full exhuast system no cat, short ram intake mesh filter. the chipped ecu. yah i think im going to try to find a stock one see if that does anything. megan headers. A/T by the way. plated off the bottom of my t/b to fix surge. oil filter intake placed on valve cover. i needed the port for the gasses return line from the intake mani. 10/40 mobil 1 oil ummm....i think thats about it. and as for the fpr i think stock is like 24 psi. i have a 92 h23a1 motor well i dont know if the motor is 92 i got it off a junk yard so.. but my car is a 92 si prelude.

also i changed my tps and just kinda put it half way in the middle also where
should that be at?

my mpg is around 19-20 mpg horrible as i hear my motor should be doing 24-28

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by royalfelix &raquo;</TD></TR><TR><TD CLASS="quote">ok well i have as in the words of upgrade, pulley set, magstar 8.5 mm wires NGK R plugs set at .050 i set my disb in the middle. would more advanced give me more spark better burning the fuel? ok also i have a full exhuast system no cat, short ram intake mesh filter. the chipped ecu. yah i think im going to try to find a stock one see if that does anything. megan headers. A/T by the way. plated off the bottom of my t/b to fix surge. oil ilter intake placed. i needed the port for the gasses return line from the intake mani. 10/40 mobil 1 oil ummm....i think thats about it. and as for the fpr i think stock is like 24 psi. i have a 92 h23a1 motor well i dont know if the motor is 92 i got it off a junk yard so.. but my car is a 92 si prelude.

also i changed my tps and just kinda put it half way in the middle also where
should that be at?

my mpg is around 19-20 mpg horrible as i hear my motor should be doing 24-28</TD></TR></TABLE>

get rid of the chipped ecu. where did you get it from? what is the timing set at?

.50 is a little on the big side of gap, i'd shoot for .45 or so.

 

when you say what is the timing set at you mean the disb? its half way like in the middle of advanced and low

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by royalfelix &raquo;</TD></TR><TR><TD CLASS="quote">when you say what is the timing set at you mean the disb? its half way like in the middle of advanced and low</TD></TR></TABLE>

that doesnt tell me anything. You need a timing light to make sure the distributor is in good timing.

 

ok first news there whats a timing light? and whats most prelude disb timing at?

 

what it looks like:
http://www.vw-resource.com/images/timing_light.jpg

Timing light connects to #1 plug wire and battery, and flashes every time cyl #1 sparks. Shine the flashing light at the flywheel, and it will indicate how many degrees BTDC your timing is set at.

15* BTDC

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by royalfelix &raquo;</TD></TR><TR><TD CLASS="quote">ok well i have as in the words of upgrade, pulley set, magstar 8.5 mm wires NGK R plugs set at .050 i set my disb in the middle. would more advanced give me more spark better burning the fuel? ok also i have a full exhuast system no cat, short ram intake mesh filter. the chipped ecu. yah i think im going to try to find a stock one see if that does anything. megan headers. A/T by the way. plated off the bottom of my t/b to fix surge. oil filter intake placed on valve cover. 10/40 mobil 1 oil ummm....i think thats about it. and as for the fpr i think stock is like 24 psi. i have a 92 h23a1 motor well i dont know if the motor is 92 i got it off a junk yard so.. but my car is a 92 si prelude.

</TD></TR></TABLE>

Mother or God, it is amazing that poor Prelude is even running Yes, you need to go get a TIMING LIGHT/GUN and fix your timing the right way.

You need a catalytic converter for your 02 sensor to read correctly and adjust the A/F ratio.

The eBay chip is also killing you....as you know.

You have an adjustabe FPR?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by royalfelix &raquo;</TD></TR><TR><TD CLASS="quote">i needed the port for the gasses return line from the intake mani</TD></TR></TABLE>

What???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hawkze_2.3 &raquo;</TD></TR><TR><TD CLASS="quote">

You need a catalytic converter for your 02 sensor to read correctly and adjust the A/F ratio.
</TD></TR></TABLE>

O2 is before the cat, not after

you cant just set timing "in the middle," thats not how it works

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95greenlude &raquo;</TD></TR><TR><TD CLASS="quote">

O2 is before the cat, not after

you cant just set timing "in the middle," thats not how it works</TD></TR></TABLE>

D'oh! I was thinking he was ODB2

 

lol i love you guys, lol. ok so i have been looking up on the timing light and im still not quite sure how it works. can anyone explain it to me like if i was a 1st grade kid? also like i said i put on my tps sensor new and i just kinda put it in the middle... where should it be at? and what affects would it have if placed to advanced or to retarded. i know to advanced it wont let me put my car in gear. ( A/T )

and yes i have a FPR it looks pretty and well... it looks pretty :Dits set at 21 psi hence trying to get my car to run leaner.. the stock psi i think is 24

 

the timing light is a device to measure timing of an engine, stock timing settings are 15* (degrees) Before top dead center. its basically a strobe light that illuminates the timing marks that you can see in the window on the front of the transmission. it hooks to the positive and negative and one of the spark plug wires. i senses when spark is put to that wire and it blinks every time its done. hook up the timing light and point it to the window to see your timing, then your timing is adjusted by rotating the Dist. cap. (loosening 3 12mm bolts)

 

ok the window on the transmission which shows me the flywheel has marks? and which cyc is #1 the one closest to the crank pulley or the one closer to the battery. Passanger or drive side.

this site told me to look at my crank pulley.. by the way my crank pulley is unorthodox. http://www.c-speedracing.com/h...g.php

 

cyl 1 is on the Driver side, but i've found you can put it on any spark plug wire and get the same results.

no dont look at your crank pully, theres no marks, only on your flywheel

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hawkze_2.3 &raquo;</TD></TR><TR><TD CLASS="quote">

D'oh! I was thinking he was ODB2 </TD></TR></TABLE>

That still wouldn't matter.

 

what do the marks look like? your not talking about the teeth right...?

 

^its next to the teeth, you cant photograph them, the flywheel is moving too fast.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by A Blue Lude &raquo;</TD></TR><TR><TD CLASS="quote">

That still wouldn't matter.</TD></TR></TABLE>

An OBD2 car has the 2nd sensor after the cat to make sure the cat is doing its job:



So why would it not matter??

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by royalfelix &raquo;</TD></TR><TR><TD CLASS="quote">what do the marks look like? your not talking about the teeth right...?</TD></TR></TABLE>

There is a white line, a white plus-sign (+), and a red line. They're behind the teeth closer to the engine on the flywheel. You still have a stock flywheel right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hawkze_2.3 &raquo;</TD></TR><TR><TD CLASS="quote">

An OBD2 car has the 2nd sensor after the cat to make sure the cat is doing its job:

So why would it not matter??</TD></TR></TABLE>

Because that's all the second sensor does. It doesn't have any part in trimming fuel.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by A Blue Lude &raquo;</TD></TR><TR><TD CLASS="quote">

Because that's all the second sensor does. It doesn't have any part in trimming fuel.</TD></TR></TABLE>

Ahhh...so say if you have no cat and the 2nd sensor gets weird readings, would the ECU not change timing/fuel/etc to try and fix it? Or it just won't make it run lean, only richer?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hawkze_2.3 &raquo;</TD></TR><TR><TD CLASS="quote">

Ahhh...so say if you have no cat and the 2nd sensor gets weird readings, would the ECU not change timing/fuel/etc to try and fix it? Or it just won't make it run lean, only richer?</TD></TR></TABLE>

I get the impression that a CEL due to the cat. converter/secondary oxygen sensor won't trip the ECU into safe mode (a primary o2 sensor code will absolutely), but I honestly couldn't say for sure. I guess I'm too environmentally friendly or too OBD1.

The primary sensor is already trimming fuel in that back and forth cycle that is supposed to be optimal for a cat converter's functionality.
I would be interested to know if the primary and secondary are ever used to check one another, in the same way the MAP and PA (Pressure Altitude) sensors can be used (in certain conditions).


Modified by A Blue Lude at 9:00 AM 2/3/2008

 

Why are you running 10w-40? Have you tried flushing your auto tranny? Have you tried a top end cleaner or seafoam? What is your mpg actually?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95greenlude &raquo;</TD></TR><TR><TD CLASS="quote">cyl 1 is on the Driver side, but i've found you can put it on any spark plug wire and get the same results.

no dont look at your crank pully, theres no marks, only on your flywheel</TD></TR></TABLE>


well the timing light will work on any cylinder of course, but it needs to be on cyl#1 to set the timing to the marks.