Solid CEL Light . . . . only happened yesterday after swapping in some DSM 450's & a resistor box. Haven't figured out the problem yet. Swapped out my injectors from stock to DSM 450's, added the resistor box, put in my chipped p28 and well now I got a solid CEL as well.

Put back the stock p28 ecu, and now still have a solid CEL, what all could be the problem? No way both ECU's are bad because I was just driving on the stock p28 yesterday prior to us installing the injectors.

Any info would be great . . . car feels like it's hitting rev limiter when u give it gas, or maybe running on 3 cylinders, but we know it's running on all 4.

Car runs pig *** rich which I guess could be a problem . . . . . gota keep your foot on the gas to keep the car alive, and my vacuum gauge instead of reading around 22-22 it's reading 10 and even if I let off the gas to let it die out it only goes to about 12 so there is a vacuum issue some place some way some how.

Any suggestions?

Setup:

94 Civic DX Hatch
D16z6 Motor
Fully Built Head
Greddy Turbo Kit
MSD Ignition W/Blaster Coil
Walboro 255lph Fuel Pump
DSM 450cc Injectors
Resistor Box
Chipped p28 (uberdata)

**PHOTO BELOW** Noticed a 1k resistor was soldered in the wrong spot, hopefully that fixes it.


****UPDATE**** 1k Resistor Soldered In The Proper Place Fixed Issue


Modified by Vtec92Civic at 8:25 AM 3/24/2005

 

sounds like a MAP issue even tho when you have a solid CEL i think the ECU is bad.

have you reset the ecu, when you switched them, i mean did you pull the fuse in the box under the hood, and undo the battery cable??

it may still be stored in the ecu

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mrbsponge &raquo;</TD></TR><TR><TD CLASS="quote">sounds like a MAP issue even tho when you have a solid CEL i think the ECU is bad.

have you reset the ecu, when you switched them, i mean did you pull the fuse in the box under the hood, and undo the battery cable??

it may still be stored in the ecu</TD></TR></TABLE>

i'll give that a try. I find it hard that all of a sudden both ecu's would be bad . . . the stock and chipped one. I was driving around on the stock on yesterday, but now it even does that SOLID CEL thing.

We did take off the FMU that was on the car, and installed the injectors with the resistor box and changed the ECU that is all we did, and now this happens. Hope that someone can help me out I need my car to look for work.

 

might be a system to lean to rich code, if your dumping that much fuel in there. or could be an o2 code.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbodohcsi &raquo;</TD></TR><TR><TD CLASS="quote">might be a system to lean to rich code, if your dumping that much fuel in there. or could be an o2 code.</TD></TR></TABLE>

would that really cause the CEL to be solid with no code though?

got the car started with the stock p28 and 450's I swear it idles like one cylinder isn't firing, but how can u really tell if they are all firing or not?

Is there a way to test a resistor box? THat's the only thing I can think that may be wrong is the box might be messed up.

 

You sure you hooked everything up correctly with the resistor box and DSMs?

You may have burned the injector drivers in both ECUs

 

are you running a map set for the 450's?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 01geeser &raquo;</TD></TR><TR><TD CLASS="quote">are you running a map set for the 450's?</TD></TR></TABLE>

Yeah I am running a map scaled for the 450's! The map was made by a reputable guy I know/friend. I tried making a basemap of my own and it comes out richer then his basemap. My car always started on his basemaps.

Resistor box is hooked up right
injectors are right

one thing I noticed was shitt soldering job on my ECU. We tried to touch that up, noticed that one of the resistors was put in the wrong spot, could that be the problem right there?

I am gona go get the resistor today and give it a shot.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xenocron &raquo;</TD></TR><TR><TD CLASS="quote">You sure you hooked everything up correctly with the resistor box and DSMs?

You may have burned the injector drivers in both ECUs </TD></TR></TABLE>

Is there anyway to tell?

 

TTT Help!

 

i had a CEL when i installed my dsm 450's and resistor box, one of the wires wasnt hooked up so it threw a cel, redid the wiring, no cel's, coil burned out, wouldnt crank, replaced coil, dyno tuned with hondata

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCrx89 &raquo;</TD></TR><TR><TD CLASS="quote">i had a CEL when i installed my dsm 450's and resistor box, one of the wires wasnt hooked up so it threw a cel, redid the wiring, no cel's, coil burned out, wouldnt crank, replaced coil, dyno tuned with hondata </TD></TR></TABLE>

So your issue was:

One wire was not hooked up
Burnt out coil

and after you changed that your car rine fine? Did you have the same symptoms as me? Someone else mentioned that the solid CEL indicates a soldering or chipping issue since I am running Uberdata.

How can u tell if the coil is burnt out or not?

 

Yeah make sure the soldering job on the ecu is good. I had an ecu that wouldn't read chips for a while and would go into limp mode immediately with a solid cel.

 

My roommates hatch reads a solid CEL. He put in a handata chipped ECU and is running Uberdata and it throws the ECU CEL even though everything is working right. Something with the Hondata ECU.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nonvtecD &raquo;</TD></TR><TR><TD CLASS="quote">Yeah make sure the soldering job on the ecu is good. I had an ecu that wouldn't read chips for a while and would go into limp mode immediately with a solid cel.</TD></TR></TABLE>

You say u had a ECU that didn't read chips for a while . . . . how did you go about fixing it?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ralphie14 &raquo;</TD></TR><TR><TD CLASS="quote">My roommates hatch reads a solid CEL. He put in a handata chipped ECU and is running Uberdata and it throws the ECU CEL even though everything is working right. Something with the Hondata ECU.</TD></TR></TABLE>

Ohh . . . well i'm running Uberdata I don't have Hondata.

** HERES A PHOTO JUST TO REFRENCE. IT SHOWS WHERE MY FRIEND SODLERED THE 1K RESISTOR, BUT HE DID SO ON THE BACK OF THE ECU NOT UPTOP THERE. **

 

I re-soldered the whole thing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nonvtecD &raquo;</TD></TR><TR><TD CLASS="quote">I re-soldered the whole thing.</TD></TR></TABLE>

Awesome man . . . . . so I can re-solder the entire thing and use the same stuff? I got people PM-ing me telling me it sounds like I dropped a cylinder, or my plug wires are dead and wha not, but the plug wires are new.

The car was boosting and driving good moments before we pulled the stock ecu and injectors out, so I find it really hard for anything internal to be fucked up. The solid CEL goes off with my stock P28, but ofcourse it idles like **** still since the stock p28 can't control the 450's

Gone mention to my friend about re-soldering the entire thing over and see what's up from there.

 

Solid CEL with the diagnositic harness jumpered is a code 0 (ECU). Did you blow any fuses hooking up the resistor box? It's hard to damage a ECU unless you have uped the amperage of the ECU fuse from 15 AMPS(made that mistake once/exensive lesson). Sometimes a short can cause a solid CEL, but it that were the case I would think you'd have the same result from both ECU's.

 

a solid CEL usually means bad ECU.
a few things to check.
sodering and placement of resistors. (as you said you may have bad sodering joints and it won't work without good connections.)
Is the chip put in right. do you have the arrow twards the lifter on the Zif socket?
fueses should be ok because the Cel is working, if the ECU didn't have power you wouldn;t have a cel.

good luck

 

To Everyone That Helped Me Out Issue Was Resolved lastnight . . . . . It Was The 1k Resistor In The Wrong Spot . . . . Now Off For Some Tuning With My New Wideband

 

i know u already resolved the issue but FYI on the bad coil , just pull a plug out hold a screw driver to the end and hold the rubber side (please do not try this for fun, this is only to check spark ignition) have someone turn the car and crank for a split second, it should spark, if not the coil is bad, in my car mine was burning thru the heat shield so u could smell it, i put a type r coil in and its been cranking up like a dream.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCrx89 &raquo;</TD></TR><TR><TD CLASS="quote">i know u already resolved the issue but FYI on the bad coil , just pull a plug out hold a screw driver to the end and hold the rubber side (please do not try this for fun, this is only to check spark ignition) have someone turn the car and crank for a split second, it should spark, if not the coil is bad, in my car mine was burning thru the heat shield so u could smell it, i put a type r coil in and its been cranking up like a dream.</TD></TR></TABLE>

sweet deal i'll keep that in mind. Thanks man