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help...code 4
turbohf:
1992 Civic CX
D16Y8 engine
Z6 intake manifold
stock engine harness
2 different distributors...original (china looking) and random parts bin
3 ecu's...stock P05, chipped P06 and P28 w/slightly tweaked Z6 base from crome software
so car was running and driving, no CEL. not saying it ran great or perfect. was just a slow as ballz CX. maybe it did have issues? idk. but no CEL ever came on.
i did Y8 swap... i swapped the original harness back on. i cut out the purge valve fucker plug off, and relocated the IAT (no cut). i swapped the stock CX distributor onto the Y8.
i chipped a random P06-A52. converted it to VTEC, AT to MT, etc. but i dont have VTEC wired so its all turned off with a 5k revlimiter for the moment.
i start the car up, but it takes a lot of cranks... after a throttle screw adjustment (it was all the way out) it idles just fine for 30+ mins for my break in.
i check the codes, i get 4 and 21 (how? it was turned off, but doesnt throw it now). so i swap in a known good P28 we used in my buddies car. code 4...
i check the plugs at the distributor, look fine. no shitty or pulled pins... check at strut tower, same. and nothing looks shady at the ECU either.
i swap in the P05-A00 (not the original to the car though, it was stolen, but right number per VIN), it starts and DOES NOT CODE UP. idle is scary low (no tach), and doesnt run for shit... did a quick trip around the parting lot. idk what to expect though? its for a 1,5 8v motor with 190cc injectors? but didnt seem to run good.
throw either one of the other ECUs back in and it code 4's...
i took a trip down the street real quick with the chipped P06 and it really didnt feel too much better. it had slightly better idle and driveablity, but im gonna guess thats the 190 vs 240cc injectors?
i dont have another legit distributor for this car, so i throw together something. and plug it in....and in my frustration didnt put any plug wires on ::) but doesn't matter cuz on just cranking it throws code 4 again!... FUCK.
then i gave up for the day.
ideas?
jdmhatchracer94:
Trade it
HiProfile:
Maybe some of the wiring got chewed on? Interference (shielding is not grounded properly or cut) or a weak signal (signal wire shorted to the shield) is the most common issue for Code 4. It's a typical issue with DPFI cars converted to MPFI when reusing any of the DPFI wiring (cabin or engine harness).
One way to test it is to run a fresh shielded wire from the distributor plug directly to the ECU plug. Shielded phone wire is cheap and works well. If this doesn't fix it, something is causing massive EMI (alternator?) or your grounding in general sucks. I'd recommend checking ALL grounds first, it's the easiest to try. The signal ground on the t-stat housing should be checked first, then the wire from the trans to frame.
turbohf:
--- Quote from: jdmhatchracer94 on September 11, 2014, 04:27:27 PM ---Trade it
--- End quote ---
$3500 or trade for something worth more (no cash/straight trade)
turbohf:
--- Quote from: HiProfile on September 11, 2014, 05:23:15 PM ---Maybe some of the wiring got chewed on? Interference (shielding is not grounded properly or cut) or a weak signal (signal wire shorted to the shield) is the most common issue for Code 4. It's a typical issue with DPFI cars converted to MPFI when reusing any of the DPFI wiring (cabin or engine harness).
One way to test it is to run a fresh shielded wire from the distributor plug directly to the ECU plug. Shielded phone wire is cheap and works well. If this doesn't fix it, something is causing massive EMI (alternator?) or your grounding in general sucks. I'd recommend checking ALL grounds first, it's the easiest to try. The signal ground on the t-stat housing should be checked first, then the wire from the trans to frame.
--- End quote ---
I poked a both grounds. both are tight. but in depth look is now planned.... fuck. I don't think I put he ground back on the head...I know I didn't...
buddy said something along those lines and wants me to jumper direct to the ecu.
edit: I didn't see any signs of rodents or damage to anything. no cuts or patches. etc. no signs of O0 or :mexi:.... but :Jew: was there...
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