Question about 1992 Nissan 240SX Fastback

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Engine flooding on #2 and #4 cylinders, replaced fuel injectors, TPS, and ECM.

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Just a suggestion, but get a fuel pressure gauge and check your pressure regulator.  They use intake vacuum to control a diaphram that regulates the fuel based on RPM/vacuum relationship.  I had a Supra with a similar problem - had all the mechanics stumped.  It was flooding in #1 and # 2 cyl. badly.  Turns out rubber diaphram in pressure reg. cracked and the engine vacuum was pulling gas directly into the intake manifold on top of what the injectors were supplying!  Also, lifting the regulator's vacuum line off the manifold and holding it close to the vacuum, you'll actually see gas getting sucked in if that's the problem.  I took the same route you did, replaced inj. etc, before I stumbled on this.  Good luck!

Posted on Sep 03, 2008

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What are the probable causes of DTC P0302?


code p 0302 refers to cylinder 2--misfire detected===causes --engine mechanical fault--wiring---ignition/fuel system---injector--ECT/MAF sensor---ECM
check the fuel pressure in the fuel manifold ( one reason for low power and missing)
check/ replace no 2 injector
check that the wiring for no 2 injector has no moisture in any harness connections

Feb 13, 2016 | Cars & Trucks

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Getting my car started


If the vehicle is getting fuel and spark and has decent compression it should start. You may have an issue with the injectors not working causing a no fuel supply to the engine. Does the check engine light come on during a bulb check? The injectors are normally fused and are usually under the fuse marked ECM or Ecm A or ECM B. It is also possible the vehicle may be flooded for some reason or another. You can try holding your foot to the floor ( this will shut off injectors) while cranking the engine to clear out a flooding situation

May 02, 2015 | Oldsmobile Cars & Trucks

1 Answer

First codes were 201 300 301 put in reman comp. codes were202 300 302 another reman comp code is 203. are the remans bad or other problem


You mean P0202 , an what engine does yours have ? 2.6 L ,3.3 L , 3.6 L or 5.7 L ?
DTC P0201, P0202, P0203, P0204, P0205, or P0206
The engine control module (ECM) enables the appropriate fuel injector on the intake stroke for each cylinder. Ignition voltage is supplied directly to the fuel injectors. The ECM controls each fuel injector by grounding the control circuit via a solid state device called a driver. The ECM monitors the status of each driver. If the ECM detects an incorrect voltage for the commanded state of the driver, a fuel injector control DTC sets.
Test your fuel injector for cylinder #3 ! Do you know how to do that ?
You probably changed computers for nothing ! Check out this video on testing fuel injector circuits an checking computer driver that controls the injectors , Oh , by the way P0300 P0301 an P0302 are misfire codes , P0300 is a random misfire an the other two are for cylinders 1&2
Testing Fuel Injectors Fast PCM Driver Testing II without scan tool Did you just replace the PCM - engine computer ? Didn't test anything !

Apr 06, 2015 | 2004 Cadillac CTS

1 Answer

Cylinder misfiring p0302


code p0302 refers to cylinder 2 --misfire detected ===causes--engine mechanical fault--wiring---ignition/ fuel system---injector--ECT/MAF sensor--ECM
move no 2 injector to another cylinder and see if the miss moves . If so replace the injector . IF not check the wiring to no2 injector. Check the HT lead to no plug and replace it the connections are loose.

Jan 11, 2014 | 1995 Mazda Millenia

2 Answers

87 chevy four cylinder fuel injector wont spray


With the key on do the fuel injectors have one wire that shows (+) battery voltage of 12+ volts? If not check for a shorted engine wiring harness, also check all fuses marked "ECM" there should be two fo them. ECM 1 and ECM 2.

Nov 01, 2012 | Cars & Trucks

3 Answers

Throttlebody, injectors pouring gas instead of spaying , truck will start for seconds till gas pours & floods. I've replaced injectors put kit in fuel presure regulator,set #1 pistom up,timing mark...


Sounds possible to be a bad TPS (throttle position sensor). This should be located on side of throttle body and monitors where the throttle is, it sends this information to the computer and thus sends to pump to either increase or reduce fuel supply to injectors...If it has malfunctioned in the wide open position, it would be continuously feeding to much fuel to the injectors. Foolow the throttle cable up to throttle body....opposite of the throttle side should be a sensor with an electrical connector...this will be the TPS.

Sep 18, 2011 | Chevrolet S 10 Cars & Trucks

1 Answer

I have a 2002 Jaguar X-type. The check engine light came on and it has been acting jumpy/shaky. I recently took it to be diagnosed and the codes I recieved back were P1314, P1316, P1111, and P0302..What do...


All fault codes can be checked out at http://www.bluejag.co.uk but here are the results for some of yours. You can ignor P1111. Looks like a faulty plug or coil pack cylinder 2

Fault Code:- P1314 Indicates a Power-train fault


The fault is generally due to a problem in the Ignition or Misfire area


Fault Description: Misfire rate catalyst damage -bank 2 NOTE: This DTC will flag only when accompanied by an individual cylinder misfire DTC: P0300 - P0306

Action of ECM:- ECM Default:- Maximum engine speed reduced


After clearing the DTC, complete the Misfire monitor drive cycle
Check for a reoccurrence of fault DTC.


Possible Fault:- Cylinder compression low Worn camshaft / broken valve spring(s) Fuel delivery pressure (low / high) Fuel injector(s) restricted / leaking Fuel injector(s) continuously open Fuel contamination Fuel injector circuit fault(s) (Injector DTCs also flagged) Spark plug failure / fouled / incorrect gap ECM to ignition coil primary circuit fault (Cylinder misfire detected DTC also flagged) Ignition coil failure
Fault Code:- P1316 Indicates a Power-train fault


The fault is generally due to a problem in the Ignition or Misfire area


Fault Description: Misfire excess emission NOTE: This DTC will flag only when accompanied by an individual cylinder misfire DTC: P0300 - P0306

Action of ECM:- none


After clearing the DTC, complete the Misfire monitor drive cycle
Check for a reoccurrence of fault DTC.


Possible Fault:- Cylinder compression low Worn camshaft / broken valve spring(s) Fuel delivery pressure (low / high) Fuel injector(s) restricted / leaking Fuel injector(s) continuously open Fuel contamination Fuel injector circuit fault(s) (Injector DTCs also flagged) Spark plug failure / fouled / incorrect gap ECM to ignition coil primary circuit fault (Cylinder misfire detected DTC also flagged) Ignition coil failure

Fault Code:-
P0302 Indicates a Power-train fault


The fault is generally due to a problem in the Ignition or Misfire area


Fault Description: Misfire detected ?€" cylinder 2

Action of ECM:- none


After clearing the DTC, complete the Misfire monitor drive cycle
Check for a reoccurrence of fault DTC.


Possible Fault:- Refer to P0300 Possible Causes

Aug 25, 2011 | 2002 Jaguar X-Type

1 Answer

I have an 89 chevy c1500, 5.7, 2wd. Had it running and trying to get it timed. During this process i noticed the injectors quit giving gas. I put gas in it and nothing changed so i have been chasing the...


the reason the injectors stopped is because the motor is not running.this is a safety precaution built into the computer so the engine won`t flood.if the fuel pump is not working then you will have to check powers and grounds at the fuel pump connector by the gas tank to see if the unit is getting fed power and ground.someone will have to try to start the car while you check this out as there is a 2 second prime circuit if the car is not turning over.also this system uses the distributor to know that the engine is turning over to start.you may have a bad pickup coil in the distributor.this system also grounds the injectors through the ecm so you should have power to the injectors when the ignition is turned on,for your information.

Apr 08, 2011 | 1990 Chevrolet K2500

1 Answer

Trac off light came on and off then stayed on while driving, p0203p0204 p0300 codes when scanned with little machine better read open circuts in both injectors loss of power


P0203 - Injector Circuit Malfunction Cylinder 3

Powertrain Control Module (PCM) or Electronic Control Module (ECM) checks the injectors circuit resistance and monitors the voltage drop during normal operation. The PCM/ECM will trigger the P0203 code when the resistance or voltage drop at the injector #3 is out of specifications.

Causes:
- Open or shorted wiring harness to the injector #3
- Bad injector #3
- Bad PCM/ECM

Solutions:
- If damage, repair injector wire harness or connector
- Replace injector
- Replace PCM or ECM


P0204 - Injector Circuit Malfunction Cylinder 4

Same info as the P0203 DTC


P0300 - Random/Multiple Cylinder Misfire Detected

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS) signal to vary, Powertrain Control Module (PCM) or Electronic Control Module (ECM) can determine that a misfire is occurring.

Causes:
- Improper spark plug
- Insufficient compression
- Incorrect fuel pressure
- The injector circuit is open or shorted
- Fuel injectors may be faulty
- Intake air leak
- The ignition signal circuit is open or shorted

Solutions:
- Perform Injector Service
- Replace Spark Plugs
- Replace Injectors
- Replace Ignition Coils

Feb 03, 2011 | 2001 Pontiac Sunfire

1 Answer

Chevy fuel problem?


try checking how much fuel preasure you are getting under the hood, there is a valve that looks similar to a tire valve that you screw a guage onto, that engine must recieve no less that 60 psi fuel preasure to make the fuel injectors even fire. try replacing the fuel preasure regulator.

Jan 26, 2009 | 1995 Chevrolet Blazer

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