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Old 23 Mar 2013, 04:01 pm
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Default my 1991 Honda sputters when sitting at stop signs?

1991 Honda Accord sputter and sounds like it is going to die when I pull up to a stop sign. Runs fine other wise. Whats wrong wit it?

I just bought the car two weeks ago put about 300 miles on it then it started to sputter. It is a 1991 with 80,000 original miles and has been sitting since October last year. I have not checked anything yet.Put in a can of sea foam gas additive in and I just bought spark plugs I will change today. i
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Old 23 Mar 2013, 04:17 pm
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Could be a few things. Idle screw is one. You might need a tune up (plugs, wires, fuel filter, air filter, and other check ups). Could also be the oxygen sensor or another sensor malfunction. If it's currently cold where you live, it could be that your cold-weather sensor is malfunctioning (it gives you a bit more gas when it's cold out, but if it doesn't work, you'll sputter when sitting still when it's particularly cold out, especially when the car isn't fully warmed up.) Could also be a malfunctioning computer chip (or relay, if your car is old). Even if you work on your car yourself, you might want to talk with a mechanic. They can run the car on a diagnostic computer and it will likely say what the problem is instantly. If you're not planning on having them do the work, tell them and they'll probably charge $30 or less to run the diagnostic. (Take it to a small independent shop, and call first to make sure they're cool with doing this...most will, but some won't.) One last thing to check (or first) is that the fuel filter isn't clogged. Because you just got a new fuel pump, it could be that the increase in power of the pumping (dying pumps get weak before they die) dredged up some of the crud that sits at the bottom of the tank and is now stuck in the filter, making it sluggish when there isn't a lot getting pumped through, like when you idle. Either way, it doesn't sound like a huge problem, the tune up or a computer chip would be a little expensive, but the cold-weather sensor on my car, just replaced, was $12 and ten minutes with a screwdriver to fix. Good luck!

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Old 23 Mar 2013, 04:31 pm
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as with all recently acquired used vehicles, one should perform *all* the periodic maintenance procedures. as if they were never done. to know where you are. most times that actually solves all issues. complete ignition tune up, oil, and all filters. even auto trans fluid and filter-do not flush(app).

though your trans and fuel delivery are not your issue. fuel issues would show up at rpm when the engine demands more. not just at idle.

all that is a must when trouble shooting an issue like this. so if any adjustments made, they won't be done under faulty conditions. thereby compounding the issue.

otherwise, check induction sensors. paying close attention the the IAC-idle air control valve. dirty.

a total induction and emissions systems and individual physical component cleaning if needed. with say seafoam deepcreep product. you can introduce that into a vacuum line. not just the fuel tank.

many DIY's on you tube. plus the seafoam site has then too.


also, any air leak from the air box to the TB will cause issues. from what you're experiencing to a no start condition.

and if the injectors are dirty. there's no fuel additive in the world that will clean those while on the vehicle. nothing short of removing/cleaning or replacing will fix that.

fuel additives will help keep things clean, and seafoam is powerful, but mostly they won't clean anything once dirty. most pump fuel contains that stuff anyway. so there's your proof on that. injectors still get clogged over time regardless.
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