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Old 05-10-2010, 10:28 AM   #1
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1990 integra.. idle problems

so my car has some idle problems...

it was idleing a lot less when i got it... now its all the time..

it would be at 1000 rpm then goes up to a little past 1500 rpm for a few secs then drops just below 1000 rpm and does this again repeatedly....

i was thinking of buying those cleaning additives you put in the fuel tank then i have to fill my gas tank and see wht happens.. but im scared i might screw thing up even worse..


anyone here knows what im talking about and how to correct this?
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Old 05-10-2010, 10:39 PM   #2
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it could be many things. you throwing any codes?
try cleaning your IACV.
or could be a vacuum leak
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Old 05-10-2010, 11:21 PM   #3
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Quote:
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it could be many things. you throwing any codes?
try cleaning your IACV.
or could be a vacuum leak
i dont have an OBD reader...
how do i clean the IACV...
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Old 05-11-2010, 02:16 AM   #4
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I'm thinking water pump. Check your coolant levels. If it's low, put some in and the next time you start it up, watch to see if the levels go down.

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Old 05-11-2010, 07:34 AM   #5
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Quote:
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i dont have an OBD reader...
how do i clean the IACV...
90-91 aren't equipped with obd.
there is a 2 wire service connector just above the passenger kick panel. you jump that with a paperclip and if you have any codes, the engine light will throw a series of flashes corresponding with the code(s). do a search. there are tutorials all over the net.

the IACV (idle air control valve) is located on the back of the intake manifold. it's held with 2 10mm bolts and has 2 small coolant lines attached. unbolt and clean the screen if it looks plugged with carbon. the actual valve may have failed though, in which case replacement will be necessary. do a search on that as well. i believe there is a test you can perform to check if it's functioning correctly.
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Old 05-15-2010, 03:08 AM   #6
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You dont need to jam a paper clip in to read the code, pull the carpet back on the passenger foot well and see if the light on the ecu is flashing.
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Old 05-15-2010, 05:36 AM   #7
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i checked, either the light is dead or there is not problem.. theres no flashing... or at least i can see it.. maybe its better if i did it at night?
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Old 05-15-2010, 09:00 AM   #8
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No you woulda been able to see it. As posted above my money is on dirty or misfunctioning IACV. Clean it or replace it and you should be good as new!
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