resolved

I am having difficulty isolating a CEL 16; hoping more knowledgeable persons can help me solve it.

Setup:
B18C1
750cc Injectors
S300
OBD2 Rywire Harness
OBD1 P28 ECU w/Conversion Harness
UEGO Wideband
Bosh 5V O2

Series of unfortunate events:
Car starts.
Runs, but rough, and throws CEL 16.
Gauge cluster lights up, but tachometer and speedometer not working.
If I increase throttle even slightly causes car to putter and die; feels as if it's being bogged down with fuel.

Diagnoses thus far:
All injector clips are clipped in.
ELD D10 voltage readout on S300 matches within a few tenths of a volt to the corresponding A/F ratio on the AEM UEGO

Theories:
Something electrical is wrong with the Rywire harness because I am not getting any RPM or coolant temperature readings on the cluster. I am suspicious that there is an electrical short somewhere that is causing the injectors to not report back to the ECU and these two problems are related by theorized short.

Alternate theory ... somehow I soldered the incorrect wire on the Rywire conversion harness to the ECU input.

Next steps:
Hope more knowledgeable persons out there have suggestions as to what else to look for, I am feeling a little lost as to what to look for.

Check I have soldered the right wires on the ECU input for injectors.

Check that I have put injector clips in the proper order.

Thanks in advance

 

Additional Trouble Shooting Step Performed:

Check injector clip order ... injector 1 is locate at the fuel pressure regulator, then 2, 3, 4 closest to the distributor.

Double checked soldering work - didn't need to solder anything for injectors so automatically rule that out.

Pulled main relay; tested continuity - test good + car starts. Figured this was unnecessary to test but prior "code 16 searches" showed a lot of people suggesting this.

Another long shot but - fuse under hood 15A looks good, not burnt.

Wondering about injector pulse in s300, haven't touch it, say that come up a few times in the searchers.

 

More Self Diagnosis:

Check all connections again.

I have a three connections that are not being utilized: narrow O2 connector, knock sensor connector, oil pressure sensor connector. I am wondering if the unconnected narrow O2 connector needs to be grounded/looped.

Other theory is the ground for this branch in located at the thermostat. I cannot possibly make it stretch to the starter - and the thermostat should be a fine grounding point.

I'll have to call up Rywire and see if they have any input as so far myself and HT seem to be drawing a blank.

 

100 views not one reply? Have I left people scratching their heads or am I being unclear?

 

Check all grounds ... Wat map are you using???

 

Checked all grounds on engine wire harness and floor cabin harness.

I am using a MAP from a 2000 Civic Si.

 

Have you confirmed all injectors are firing?
Are your injectors High or Low Impedance?
Have you ohm'd out the wiring for the MAP and TPS to the ecu from the actual sensor?

 

so after even more troubleshooting it ended up being something in the harness itself. bought a new harness, plugged it in everything fired up flawlessly.