1clean_ Ej

its like the ecu is shutting the rev limit down to 5000 rpm i dont know whats going on? could it be the knock sensor or what? im lost...need help i just got done putting a d16y8 into my 97 dx i used a 96-98 ex harness and ecu so i don't know what the problem is. the car is running like **** and everything is hooked up all i need is a knock sensor and air charge temperature sensor i have everything eles.

MR.johnson

do you have a auto ECU?

1clean_ Ej

no is a 96-98 ex 5spd. but if it was what would it do??

1clean_ Ej

what is the code on the side of the ecu for a 5spd. and an auto???

1clean_ Ej

any1

CRX91SE

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1clean_ Ej &raquo;</TD></TR><TR><TD CLASS="quote">its like the ecu is shutting the rev limit down to 5000 rpm i dont know whats going on? could it be the knock sensor or what? im lost...need help i just got done putting a d16y8 into my 97 dx i used a 96-98 ex harness and ecu so i don't know what the problem is. the car is running like **** and everything is hooked up all i need is a knock sensor and air charge temperature sensor i have everything eles.</TD></TR></TABLE>

i got that exact problem! and im lost on what to do

beanMosheen

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1clean_ Ej &raquo;</TD></TR><TR><TD CLASS="quote">all i need is a knock sensor and air charge temperature sensor</TD></TR></TABLE>

The IAT is important for the A/F ratio. Your car is in limp mode. Install the sensors and reset the ECU.

1clean_ Ej

so that should be it right? im getting the euc scanned to see if thats all the cel's

beanMosheen

You can just short the diag connector and the CEL will blink the code.

1clean_ Ej

im not sure that you can do that on an obd2 car. if you can please tell me how.

b16nonoy

msybe the chip inside the ecu is fried...i had a 4000rpm limit...

92civicboost

did you wire the v-tec into the ESU

hondasarethebest

I had the same problem when my friend put a y8 motor in a eg he didnt have the IAT sensor in cause of it in the intake on newer cars and his car ran like **** so we put a z6 manifold with the sensor in the mainfold and runs great IAT are critical

1clean_ Ej

I ordered a (IAT) sensor and it should be in Friday but I still need a knock sensor anyone got one for sale?

beanMosheen

Sorry, I was half asleep when I mentioned the Diagnostic port. you can still do it by shorting two pins in the OBD2 port. I forget which ones though. there is also a way you can cycle the key on and of to do it, although I can't remember that one either.
EDIT: It was eating me up not knowing:

12. How do I pull my engine codes if I do not have a scanner tool?

Do one of the following:

a. Go to Autozone and have them read your codes (it's free)
or
b. See the instructions below

WARNING!!!: USE AT YOUR OWN RISK AS SHORTING THE WRONG PINS WILL RESULT IN DAMAGED ECU.

a. Find the Data Link Connector (DLC) located under the instrument panel in the driver's side. It is bolted to the kick panel and is gray in color on the 1998 models.
b. Jump terminals 8 and 13 by connecting them with a wire/cable.

...............________
...._____|________|_____
.../|1...2...3...4...5...6...7...8|\
../.|==============...|.\
./..|9.10.11.12.13.14.15.16.|...\
/----------------------------------- \
DATA LINK CONNECTOR (DLC)

c. Turn the ignition key to ON and observe the "CHECK ENGINE" light. It will flash the trouble codes. For example: 2
long flashes, pause and then 3 short flashes = 23 = P0325 = Knock sensor circuit fault (4 cyl only).
One short flash = 1. One long flash = 10. If there is no trouble codes, the light will not flash.

Flashes.....Code(s)............................... ..........Description
1...............P0131,P0132....................... .........Primary heated O2 sensor circuit low/high voltage
3...............P0107,P0108....................... .........Manifold Absolute Pressure (MAP) sensor circuit low/high voltage
4.............. P0335,P0336.................................Cranks haft position sensor
5.............. P1128,P1129.................................Map sensor circuit low/high voltage
6...............P0117,P0118....................... .........Electronic Coolant Temperature (ECT) sensor circuit low/high input
7...............P0122,P0123,P1121,P1122........... Throttle position sensor (TPS) circuit low/high input
8...............P1359,P1361,P1362................. ....CKP/TDC sensor 1
9...............P1381,P1382....................... .........CYP Sensor
10.............P0112,P0113........................ ........Intake Air Temperature (IAT) sensor circuit low/high input
12.............P1491,P1498........................ ........EGR valve
13.............P1106,P1107,P1108.................. ...Barometric pressure sensor
14.............P0505,P1519........................ .........IAC valve
17.............P0500.............................. ..............VSS fault
20.............P1297,P1298........................ .........Electric Load Detector (ELD)
21.............P1253.............................. ..............VTEC
22.............P1257,P1258,P1259.................. ....VTEC
23.............P0325.............................. ..............Knock sensor
41.............P0135,P1166,P1167.................. ....Primary heated O2 sensor
45.............P0171,P0172........................ .........System adaptive fuel too lean/rich
48.............P1162.............................. ..............Primary heated O2 sensor
58.............P1366,P1367........................ .........TDC sensor 2
61.............P0133,P1149,P1163,64,65............ Primary heated O2 sensor
63.............P0137,38,39........................ ...........Secondary heated O2 sensor
65.............P0141.............................. ...............Secondary heated O2 sensor
67.............P0420.............................. ...............Catalyst system efficiency below threshold
70.............P0715,20,25,30,40,53,58,63......... .Automatic transaxle malfunction
71.............P0300,P0301........................ ..........Random/Cylinder 1 misfire
72.............P0302.............................. ...............Cylinder 2 misfire
73.............P0303.............................. ...............Cylinder 3 misfire
74.............P0304.............................. ...............Cylinder 4 misfire
75.............P0305.............................. ...............Cylinder 5 misfire
76.............P0306.............................. ...............Cylinder 6 misfire
80.............P0401.............................. ...............EGR insufficient flow
86.............P0116.............................. ...............Electronic Coolant Temperature (ECT) sensor range/performance
90.............P1456,P1457........................ ..........EVAP control system leak
91.............P0452,P0453........................ ..........EVAP fuel tank pressure sensor low/high input

The following codes will not flash since they require a code scanner:

P1607-PCM internal circuit failure
P1705,06,38,39,53,68,73,91-Automatic transaxle failure

HOW TO CLEAR TROUBLE CODES (after you fix the problem)
a. Remove ignition key
b. Locate fuse panel on passenger's side
c. Remove fuse no. 13 10 seconds, and then place it back in.

1clean_ Ej

nice info ...thanks!

danny_civic97

Same problem ever since I installed my VAFC2, well actually that only happens every other time I step on it, and it limits around 5500, what could it be?

vinai

did you check something simple like oil level. but yes check your codes even if the light is not on.