Question about 1988 Honda Accord 4 Door

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Can't turn the idle down, 87 fuel injected honda prelude

I need to pass california emissions and my car i failing at idle and the timing is off. The problem is my car idles around 1500 when you first start it and drops only to 1250 when its warmed up, it runs pretty well and it passes emissions in every other area including high rpm emissions. The idle screw is turned all the way down and I have had the vacuum lines checked for routing and leaks, no problems. Occasionally the idle jumps up and down and I did notice once that blocking the intake hose?/air flow tube? when the car was cold seemed to drop the idle a bit but does nothing when its warm. please help!

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  • aprilchaplin Mar 06, 2009

    disconnecting the battery didn't help

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Check the spark plug gaps, and make sure that the plug wires are on correctly

Posted on Mar 06, 2009

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Their is a electric plunger type throttle speed control that should be bellow the throttle screw or on the opposite   side of the throttle butterfly  u should be able to un plug this or at least ajust it to slow it down  when the throttle speeds up  and down listen in the engine compartment for a clicking  noise  it will be hard to hear .  when u have found it  unplug the relay thats clicking  and replace  because its faulty  and causeing your problem 

Posted on Mar 06, 2009

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Hi!

You will have to use the CA emissions converter, also check your O2 sensor.

Posted on Mar 06, 2009

  • Rylee Smith
    Rylee Smith Mar 06, 2009

    Also clean the ports of the EGR valve(Exhaust Gas Recirculation).

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Try resetting the computer by unhooking the battery for ten minutes

Posted on Mar 06, 2009

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1 Answer

I have an 88 prelude with a low idle problem. from a cold engine start, it starts with 2000 or higher rpms and then after its warms up it goes back down to ABOUT a thousand but then bounces around eve


Hi Lasbs, Check the ignition timing and adjust with a stroboscopic timing light. The correct timing should be 10 degrees BTDC. If the vehicle is fitted with a carburetor, I believe it needs adjusting correctly, or with the Honda carb, it may be easier to replace it. If the vehicle is fuel injection carry out a diagnostic scan. Also make sure that all vacuum tubes are fitted tightly and that there are no cracks or broken joints. Regards John

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Vacuum hose diagram for 89 honda prelude


Hi there:
I suggest check this links, according with the fuel system:
- Fig. 62: Vacuum hose routing-1989 carbureted Prelude (except California)
- Fig. 63: Vacuum hose routing-1989 carbureted Prelude (California)
- Fig. 64: Emission component schematic-1989 carbureted Prelude
- Fig. 65: Vacuum hose routing-1989 fuel injected Prelude


Hope this helps; also keep in mind that your feedback is important and I will appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

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2 Answers

Can't turn the idle down


you have 2 idle settings. one is for cold and one is for after the engine has warmed up. So find the scew that goes to the warm engine idle. turn it down and your set. You might need a Chilton to find what you are looking for.

tepfy

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1 Answer

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I have an 87 Accord with fuel injection that always had a fast idle, and a surging problem when warming up. Both problems went away when I replaced the fast idle valve, which is bolted to the rear of the intake manifold just downstream of the throttle body.

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1 Answer

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Aug 08, 2008 | 1990 Honda Prelude

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