My idle bounces(surges) constantly from 1000-1500rpm ONLY when I hold down my brakes or when turning on my headlights. This began to happen when I swapped in my B18C-R into my DA. The motor runs perfectly. Heres a list of things Ive tried..
1) switch to a brand new IACV
2) switch to another throttle body w/ sensors and new gasket(even adjusted the TPS senor)
4) New Hondata intake man. gasket.
3) cannot be my alternator since it is new and worked perfectly on my previous motor. (Checked the voltage and the battery)
4) changed the PCV valve
5) checked all hoses for leaks - none
6) swapped to another distributor
7) new spark plug wires
8) checked all my ground wires
9) adjusted my FPR

By the way, I am using a P28 ECU with Erick's racing chip. I tried using a different program(JUN) and it still has the idle problem.
My voltage readings are in specs. Any suggestions??? Is this a electrical problem??? Any other sensors that I should look at???

 

Not to be a *****, but wouldn't you be better of asking in the 'Hybrid'
Engine and Suspension Swaps Between Series Forum ?

 

my bads.. mods please move this post

 

How's your coolant level? Did you try bleeding out the system?

 

well your motor is grounded wrong

 

I'll bet it's a vacuum leak still.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nameless RB26 &raquo;</TD></TR><TR><TD CLASS="quote">I'll bet it's a vacuum leak still.</TD></TR></TABLE>

Ditto.

 

I have the same problem as you... I just blame it on the P28. I don't have these problems with my stock ECU... 2 seperate p28's have yeilded similar results...
First it was the Kenji ECU
Now P28 with Hondata S200

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by misfit &raquo;</TD></TR><TR><TD CLASS="quote">I have the same problem as you... I just blame it on the P28. I don't have these problems with my stock ECU... 2 seperate p28's have yeilded similar results...
First it was the Kenji ECU
Now P28 with Hondata S200</TD></TR></TABLE>

unplug your evap purge valve...that could be it

 

I have the same issue at times.. running on a p28 hondata

 

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

unplug your evap purge valve...that could be it</TD></TR></TABLE>

BINGO!

 

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

unplug your evap purge valve...that could be it</TD></TR></TABLE>

Ding Ding Ding!

 

i had that same problem too...i was on a p28 w/ a mugen program. i dont think R's run right with p28's. try a chipped p72 since a 72 is already for a 1.8

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hyper16-Johnny &raquo;</TD></TR><TR><TD CLASS="quote">i had that same problem too...i was on a p28 w/ a mugen program. i dont think R's run right with p28's. try a chipped p72 since a 72 is already for a 1.8</TD></TR></TABLE>

wrong...they run perfectly fine on a P28....(assuming the fuel map and ignition tables are changed)

 

B18's run fine with chipped P28's.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nameless RB26 &raquo;</TD></TR><TR><TD CLASS="quote">B18's run fine with chipped P28's. </TD></TR></TABLE>

my b18c1 ran even better w/ my Kenji chipped p28 ecu..

 

If you are burning off coolant, could be the head gasket. although it would do that at all times, not only when you push in on the brakes. You should check for vacuum leaks where the brake master cylinder bolts up to the brake booster as well if you havent already checked. I had a problem with that on my own car and it took me forever to find it.

 

hey guys i also have the same problem tried turning the screw a little,..... it stopped for a couple weeks and just came back....
occaisionally it will stop but only for less than a minute


do you think it is my evap purge valve? also what is that and what does it do?

thanks

 

evap purge is for your evaporative emissions.

 

my mom's car was doing the same thing, granted it's a mazda 626. anyways i changed the sparkplugs and fuel filter and ran some injector cleaner threw it and now it runs like a champ

i think the plugs and filter did the most good