Question about 1990 Honda Civic

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90 Civic DX. Cranks but doesn't run. When towed in gear it will run, but 'bogs out' as soon as throttle applied. Engine floods upon trying to startup. Plenty of spark, fuel and air. Though

So far I have replaced all sparkplugs, the CTS, and checked timing. Belt is tight and in line. Compression is good, and the ECU doesn't throw out any codes. It flashes the one startup light and doesn't give anything else. To test it I undid the fuel injector and cranked the engine. Code 16 flashed. I plugged injector back in and reset ECU, no further codes flashed. Did noticed that top flap in throttle body doesn't open when throttle is applied (lower flap does). Is this normal? Is it controlled by pressure or could it be the throttle body actuator? How would I test that? So basically I have narrowed it down to these: 1) Crank sensor - is it in the dizzy on my model or behind harmonic balancer? 2) Cam sensor - same as crank sensor 3) Throttle body/actuator 4) Injectors - although I'm getting fuel to the point of flooding, maybe just not in the right place (throttle body)? I do smell gas there though after trying to start it up... Thanks in advance for any ideas or advise!

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  • Steva Rajkovic Jan 13, 2013

    Hi There

  • Steva Rajkovic Jan 13, 2013

    Hi there

  • Steva Rajkovic Jan 13, 2013

    What you did before either on, and or in engine,??? How did you got to point where engine wouldnt' start.Did you pull out distributor shaft

  •  Shiloh G
    Shiloh G Jan 14, 2013

    Not sure what you mean by pull out distributor shaft. I didn\'t do anything that I am aware of to cause the engine to not start. It begin about a month ago when it would have difficulty starting, but I didn\'t think too much of it at the time. I would stop off at the store, shut the car down and when I came out a couple of minutes later it wouldn\'t start. After sitting for a few minutes I would try again and it would fire right up. It only did it a couple of times. I also had a couple of times where it would stutter when I stopped at a stop sign, but it would keep running if I put throttle to it. I thought at the time that I just needed to get octane boost or something. Then one day I went to drive and it started right up, but as I drove the engine started to studder and cough. It never backfired, it just sputtered as I drove. I stopped at a light and it stalled. I couldn\'t get it to fire up again, it just kept cranking over and over. I managed to get it home by rolling down a roll and jump starting it off the tranny. It ran on the tranny, but stuttered whenever I pressed on the accelerator. I got it into my driveway and as soon as it stopped it stalled. I haven\'t been able to get it to fire up since. It cranks, but doesn\'t catch.

  •  Shiloh G
    Shiloh G Jan 14, 2013

    oh that's funny... it put "******" whenever I typed t-r-a-n-n-y, as in the short form for transmission.

  • Steva Rajkovic Jan 14, 2013

    How many miles on engine.?? Sound like blew head gasket??

  •  Shiloh G
    Shiloh G Jan 14, 2013

    We checked that and it seems like all signs point to it being ok. I am actually rethinking the main relay. Even though my mechanic said it was fine because he heard the 'click' I read that it should actually give three clicks, not just one. So I'm going to pick one up from the wreckers after work just to try. If it does fix it I'll buy a new one.

  •  Shiloh G
    Shiloh G Jan 15, 2013

    Wreckers didn't have a relay so I ordered one online. I will post when I get it, hopefully not too long.



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You probably have timing belt "jumped" out of alligmnent with crank, cam shaft. Read manual Haynes, i am civic guy. Just love those cars. If that is right on, go 3 times or so, check distribution cap, take it of, number one clinder on compression- rotor should point on number one cylinder. Go 180 degres ccw. Go to next cylinder ( firing order ) 1-3-4-2. If that dont work check compresion in cylinders.Maybe you blew piston or two. Hope this help.

Posted on Jan 13, 2013

  •  Shiloh G
    Shiloh G Jan 13, 2013

    Timing is right on and compression is good. I was thinking it ight be the Cam Sensor or Crank Sensor, but I haven't found where those are located. The closest post I've seen says that they are in the distributor and cannot be worked on in there, they need to be replaced with the dizzy. Is this right? On the 92+ models the crank sensor is behind the timing belt cover, but there is nothing to support this on the 1990 model.

  • Steva Rajkovic Jan 13, 2013

    Did you pull out distributor shaft.??? Its' so easy to make mistake without notice it.


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First I am not aware of two flaps or throttle plates in the body, but I do see a rubber diaphram with a rod that could open a plate with vac.
If you have something blocking air entering the throttle body it could cause the engine to flood. A faulty temp sensor could also be telling the computer to dump extra fuel into the cylinders, but you should have a trouble code for that.
If the plugs are getting spark the ignition system is working.
What would happen if you disabled the fuel pump and started it without extra fuel ? You could have a leaking fuel pressure regulator or something allowing extra fuel into the cylinders.

Posted on Jan 13, 2013


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Posted on Jan 02, 2017

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SOURCE: changed spark plugs and timing belt, engine won't start dtc po336

I had this problem before, they way i got round it was to put the sensor just say half way in until the engine sound good on tick over, once that is good make a spacer to keep it like that...or.. like i did buy a new sonsor.

Posted on Dec 01, 2008

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SOURCE: Engine will not start 2.0FI

yea that is a count how many times it not sure what problem 5 flashes is but you can download a hole manual for it @

Posted on Sep 01, 2008

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SOURCE: 91 civic engine flooding

2 things come to mind.. Fuel pressure regulator.. and Leaking injectors..

Posted on Mar 08, 2009

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SOURCE: 1995 honda civic d15b7 cranks but wont start. new

Are you sure you have correct timing? its definetly a fule problem, if timing is good then turn your key to the on position and try to listin for the fule pump to prime. While the key is in on position go to fuel rail, there is a valve on fule rail called sharader valve. Get a small screw driver and press valve in to check if car has fule pressure. if pressure is present then it is incorrect timing or possible bad cam sensor.

Posted on Mar 01, 2010

  • 10319 Answers

SOURCE: 2001 honda civic ex,wont start, no injector pulse,

Injector pulses are sent from the engines computer. Have that checked out

Posted on Apr 07, 2010

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