I have a 94 civic ex with a jdm b16a. It has a chipped p28 ecu. I had idle problems and replaced and calibrated the tps(.4 closed 4.3 wot). Cleaned the IACV and FITV and all idle issue were solved.

However i happen to noticed a orange wire(pin4) on the distributor was cut. I reattached this wire. After i did all these things now the car cuts out at around 3500rpms almost like its hitting the rev limiter. Limp mode maybe?? The car had the CEL on before i did anything and currently does as well. When i do the cel jumper the cel stays solid (code 0). Which is a G101 code(ECU code).

I have tryed disconnecting the wire, reconnecting it, batt reset, you name it. Nothing seems to fix this cut out problem. I did notice that the distributor was missing one of the 3 bolts and one of two holding it in place was very loose. Could the dizzy have shifted and caused this problem? It still idles fine and drives fine below 3500 rpms,

PLEASE HELP or im gonna burn this damn car to the ground! (jk)

 

It sounds to me like your dizzy has gone out of whack, I would definitely start there. code 0 is bad ecu, which can sometimes just be a bad ground, or loose wire

 

it has o be the back sensor plug on the intak mani mine did the same exact thing ano forgot i unplugged then plugedit in nd it was fine

 

yeah thats something to look at too, ive plugged those wires in the wrong spots back there when i was clean my iacv before

 

isnt the tps supposed to be calibrated at .5?

 

I would try another ECU and go from there.

 

*Update* Decided to check the CKP,TDC, and CYP resistances on the distributor plug and i got these readings.

CKP-401 ohms
TDC-416 ohms
CYP-402 ohms

Are these normal???

 

JDM B16A in my 94 ex. Trying to figure out why my car is in limp mode. Got a CEL o (zero). Here are the measurements i got off my dizzy. Are these in spec?

CKP-401 ohms
TDC-416 ohms
CYP-402 ohms

 

Yes that is within spec.
If you want to rule out the wire harness as well, you can disconnect the ECU and measure the wires from there, as well as measuing for continuity beween the wires and ground.

 

Bad distributor sensors would not throw CEL code 0.

 

Can not get rid of code 0! Please can someone tell me some possible causes of a cel 0. I know it has something to do with the ECU. Anything to test?

Thanks for any help!

 

Oh yeah. its a 94 civic ex, jdm b16a, chipped p28 ecu.

 

Did you read the CEL sticky? Any problems besides code 0?

 

Only times I've seen code zero (that the ecu wasn't bad) was when the eeprom was corrupted or written wrong (in the case of vehicles using 512kilobit eproms instead of 256kilobit).

Or some components may need to be resoldered if you recently chipped it.

If you have access to another ecu to try, do that. It'll narrow things down in a hurry.

 

Yes i have read the sticky. According to the sticky it sounds like the car shouldn't start at all with a cel 0. But it starts are runs fine(below 3500rpm). I know code 0 is a pwr/ground issue with the ecu. I will check the G101 ground on the thermostat tonight. Is there anything else to check to possibly fix this cel 0???

 

Code 0 signifies an ECU power/ground problem only if the engine won't start and run.

If you have code 0 and the engine runs, then check for a short in the CEL Grn/Orn wire or service connector Brn wire or an open in the service connector Grn/Wht wire. If those are fine, swap in a known good ECU.

 

I don't think there is a short in the wires. Because when i jumper the wires in the two pin connector it causes the srs light to consitantly flash for whatever reason. Any idea why the srs light flashes?

 

This rules out a bad service connector wire but not a short in the CEL wire.

The SRS system (airbags) has its own computer. When there is an SRS error, you pull the SRS codes by jumping the service connector, just as you would do to pull CEL codes. The SRS light then blinks the code(s). For more information, check the SRS section in the FAQs sticky.

 

Where do i find the CEL Grn/Org wire? Do i just test to see if its shorted to ground(continuity test)? Or shorted open? Like from where ever i find the grn/org wire to the which ever pin the grn/org wire goes into the ecu?

Thanks

 

It runs between the cluster and the ECU.

Yes. Unplug the cluster and ECU and check for continuity to body ground at the cluster plug terminal.

 

1994 Civic EX/B16A. Iv read a lot about the honda main relay however im not 100% sure about something. Is it possible to have a bad main relay and still have the car start and run however stay in limp mode? Isn't there an ECU ground wire that attaches to the main relay? Could just a portion of the main relay fail?

 

Is this related to your CEL code 0?

 

Well maybe... idk. im about to leave work and check/try a few things. I know the car is in limp mode for sure. I believe im getting code 0 however i am going to check the grn/org cel wire for a short.

 

Sounds like you're just grasping at straws now considering this is your 6th related post for the same issue.

 

Correct. They'll throw codes 4, 8, and 9 depending on which one is bad.

Also, related threads merged.