Question about 1990 Honda Civic

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Wont fire sometimes

There's a valve with a cable that runs through it and a vacum hose that leads to the intake. It's located near the firewall. When I push in and out, it'll start. This happened a couple of times but, now all the time.

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  • mjrowe100 Jul 24, 2009

    I'll do that, thank you. Do you know what that part name is specifically?



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Its probably a PCV(crankcase pressure valve) issue...
try replacing that..have to see a picture to know for sure what your talking about..

Posted on Jul 28, 2009

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Replace the valve. the diaphram rubber has perished.Hope that was help full.

Posted on Jul 24, 2009


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1 Answer

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Depands on year and model. Early models have a cable with directs the vent openings. If early check cable has not come off behind the sliding knob or more common the cable is broken. If later model usually controled by vacum. Check behind dash for hoses connected. First check under bonnet on passenger side near firewall. Look to see if small vacum hose has not come off or is cracked. It is about 3/4mm (1/4inch) thick. It runs into the cabin through the fire wall. Inside the car it is behind the turn knob in the dash. Again check hose and connections. I have even found them fallen off under the passenger side dash, people kick the hoses without realising.
I hope this helps

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Sounds as if its a thermostat problem. If your engine temperature is staying normal it could be a valve not opening up to let the water circulate through your heater hoses. Usually located in one hose near the firewall of the car and has a vacum hose attached to it its desieghned to cut off the heat for colder A/C

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99 mercury sable automatic trans vehicle idles very low randomly even stalls out sometimes high idle occurs as well reaches about 4000 rpm at times. engine light threw 4 codes, all to do with o2 sensors...

Sounds like a broken or torn vacum hose, pcv valve clogged, or bad Idle air control motor. Did you spray carb cleaner on vacum hoses or near the plastic intake., and did the motor rev up or down? Those codes represent a lean condition which means most like a vacum leak or clogged idle air motor. Sometimes the intake manifolds crack or the intake manifold gaskets crack. FInd that vacum leak or inpect iac motor

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1 Answer

Fluctuating idile, missing while driving, no code with check light on.

when your at a light and apply the brakes does the running get worse? if so you have a vacum leak. there is a temperature switch should be installed in the intake near where the top hose from the radiator goes in the motor this is like a 15 buck part. this will have 3 to 5 vacum lines to it make sure that these are not cracked or split and are all hooked up. one of these goes to your distributor check this hose.
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