1990JDMCRX

i have a 92 civic cx hatch....ok 1st gear at a dead stop will feel like its not getting enough power to move so i have to clutch and get my rpms way up to get it going, then when i start going its like it doesnt want to go it'll like jump kinda like im pressing the gass on and off intill i get into higher RPM's then itll just go like i hit VTEC (which i dont have), when i shift into 2nd gear, it does the same thing, basicly to go i have to pin it so im wasting gas like crazy with no power, and third and fourth i have nothing unless im pinning it and i have to down shift into second just to get up hills so idk wtf is going on

BryanM.

iTrader: (1)

Cel?

1990JDMCRX

nope, it idles fine as well, im thinking valves need adjusted, timing needs adjusted, a tune up is needed, or im miss firing

revhardallday

check the map sensor

1990JDMCRX

how do i know if its bad or not?

revhardallday

IDLE MIXTURE:


Idle CO 0.1%IDLE SPEED:
Fast Idle Speed:

Manual 1,000 - 2,000 rpmAutomatic 1,000 - 2,000 rpmIdle speed W/headlights and cooling fan OFF

Manual 750 ±50 rpmAutomatic (in "N" or "P") 750 ±50 rpmIGNITION TIMING:


At Idle 18 ±2°(RED) BTDCSENSOR SPECIFICATIONS:

ATMOSPHERIC PRESSURE (PA) SENSOR

Atmospheric Pressure/Output voltage chart

5 in. Hg. (125 mmHg.)2.5 Volts10 in. Hg. (250 mmHg.)2.0 Volts15 in. Hg. (375 mmHg.)1.5 Volts20 in. Hg. (500 mmHg.)1.0 Volts25 in. Hg. (625 mmHg.)0.5 VoltsCOOLANT TEMPERATURE (TW) SENSOR

Coolant temperature/resistance


-4°F (-20°C)20K Ohms32°F (0°C)5K Ohms104°F (40°C)1K Ohms176°F (80°C)350 Ohms248°F (120°C)100 OhmsFUEL INJECTOR


Connector Terminal Resistance 10 - 13 OhmsINTAKE AIR TEMPERATURE (TA) SENSOR

Intake Air temperature/resistance


-4°F (-20°C)20K Ohms32°F (0°C)5K Ohms104°F (40°C)1K Ohms176°F (80°C)350 Ohms248°F (120°C)100 OhmsMANIFOLD ABSOLUTE PRESSURE SENSOR (MAP)

Manifold Absolute Pressure/Output voltage chart


5 in. Hg. (125 mmHg.)2.5 Volts10 in. Hg. (250 mmHg.)2.0 Volts15 in. Hg. (375 mmHg.)1.5 Volts20 in. Hg. (500 mmHg.)1.0 Volts25 in. Hg. (625 mmHg.)0.5 VoltsOXYGEN SENSOR

Mixture/Output Voltage


Lean Less Than 0.4 Volts14.7 to 1 Stoichiometric 0.4-0.6 VoltsRich More Than 0.6 VoltsTHROTTLE ANGLE SENSOR

Throttle Position/Output Voltage Chart


Throttle Closed (Idle) 0.2 Volts1/4 Throttle 0.5 Volts1/2 Throttle 1.75 Volts3/4 Throttle 3.0 VoltsFull Throttle 4.0 Volts

revhardallday

MAP Sensor Cutaway/Voltage Output Characteristics

The Manifold Absolute Pressure Sensor, is a silicon diaphragm strain gauge type of sensor. It converts a pressure differential to a voltage signal which is then sent to the ECU as an input. At idle with a manifold pressure of 500 mmHg (20 in.Hg) the sensor output is approx. 1.0 - 1.25 volts, at wide open throttle manifold pressure of 0 mmHg (0 in.Hg) the output is approx. 2.75 - 3.0 volts.

1990JDMCRX

so lost<<<<<<<<<<<<<<<<NOOB!

ill have to show my buddy, he knows a hell alot more than me

revhardallday

Throttle Angle (TPS) Sensor

The Throttle Angle Sensor, connected to the side of the throttle body, is a rotary potentiometer. It is connected to the throttle shaft. As the throttle angle changes, the throttle angle sensor varies the voltage signal to the ECU. The ECU uses this voltage signal along with the MAP Sensor voltage signal to determine engine load. The typical output voltage at idle is approx. 0 - 0.5 volts and at wide open throttle approx. 4.5 volts.


the map sensor and tps sensor go habd in hand check them both out.

revhardallday

swap it with one of ur friends map sensor and see if it works do the same with the tps sensor.

1990JDMCRX

if all else fells, hows a mini-me swap sound?

revhardallday

go ls more power and cheap to do.

1990JDMCRX

i can get a long block for 200 that need decked

flatblacksleeper

did u find the problem? i have this same thing going on with my 94 DX. i have no cel, but the car has the same symptoms you described.

NVturbo

....FIVE BUCKS says the timing is off. In some cases, you can still crank the car with the timing being off one tooth (cam gears) but WILL NOT throw a CEL code.

flatblacksleeper

oh, and i recently got it smogged and i barely passed...running way rich. engine don't smoke, timing is on, valves adjusted, distributor-cap-rotor-plugs-wires-fuel filter-fuel pump-fuel pressure regulator all new.

NVturbo

Did you mess with the timing belt at all? Remember, if you ever need to take off the timing belt, you have to set the entire motor to TDC by moving the distributor and adjustable cam gears (if applicable) back to stock TDC. If you don't, the timing will be off and cause you headaches.

flatblacksleeper

no, i took it to the dealership and they couldnt find the prob either, they told me to replace the wire harness cuz it has butt-connectors all over the place from being stolen and hacked apart.

flatblacksleeper

it has a new o2 sensor also...

1990JDMCRX

my car smokes alot of white, im taking it to a honda-acura shop friday and they will look at it and tell me whats up, they said seen as how i dont get any bottom end but i get top end it could very much be my timing, somone also told me it could be my map sensor to?, oh and it runs perfect the first time i time it in the morning but when i turn it off then back on and runs like crap again

cadeMFjohnson

sounds kinda like a clutch problem

cadeMFjohnson

except for your last post :/

1990JDMCRX

well got it back from the shop, and timing was off a tooth, and valves need adjusted

flatblacksleeper

so it runs better now? i got a harness from the scrap yard and it made everything a lot better, but now i have a CEL with an O2 sensor code...but the sensor is new...after i reset the ecu, it comes on without starting the car. like its not reading the O2 sensor is there. maybe the harness between the ecu and the engine harness...or the ecu....only those 2 things left to replace...blah!

1990JDMCRX

its runs way better, i still need to do the valves, but now my rings are done, my car smokes so damn bad, well i think its my rings, i was told to use this engine treatment stuff to stop the smoking and noise and it didnt do anything!