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Old 03-15-2019, 06:56 PM   #1
Billyboa91ex4dr
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Question Vibrating in neutral @ full warm idle, 5 speed 1991 accord

Hi I just recently bought a 91 accord ex 5 speed, 180k miles..

So at full warm up it tends to start vibrating quite a bit felt in the steering wheel and seen on the top of the hood. When put into gear it smooths out nicely. Definitely burns oil at some rate. I changed the oil and replaced a hose that was leaking coolant, that’s all so far. It idles steadily at 700 RPMs at full warm idle when it shakes. I really suck at going from reverse to 1st in it.. I really hope to keep the clutch in good shape (yikes). Noticed when first applying the brakes the steering wheel gets a little shaky. Spark plugs and serpentine belt are what I’m doing next. According to its records all belts are original unless some got lost. Hope to hear from anyone willing to help out..

Side notes. AC system is inoperable, whenever I roll down windows or apply the sunroof, you can feel the vibration of the car (in neutral) change.
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Old 03-15-2019, 07:54 PM   #2
Raf99
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Engine mounts. More important the rear engine mount. It's most likely toast.
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Old 03-15-2019, 10:34 PM   #3
fleetw00d
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Likely the front torque mount is toast as well. If the rubber is significantly cracked, it needs to be replaced or repaired. I have filled several with liquid Flex Seal.

When you replace the timing belts, take your time and make sure the balance shafts are timed correctly.
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Old 03-18-2019, 01:29 AM   #4
FragginDale
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Is this in neutral and not moving? Also if you just bought it make sure to check the tires for cracks and that they are balanced Iíve ran into this before
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Old 03-21-2019, 07:49 PM   #5
Billyboa91ex4dr
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Quote:
Originally Posted by FragginDale View Post
Is this in neutral and not moving? Also if you just bought it make sure to check the tires for cracks and that they are balanced Iíve ran into this before
Front tires actually keep going down from 32 psi to 29, I have to get new tires for sure. In the mean time the idle has been starting to drop and feelin like it might bog out and die one of these days at a stop light... sometimes it is idling ow out 500 RPM, although the rpm gauge can be a little confusing as it looks like it has two beginning points haha. Thanks for your help everyone!! I want to keep this car on the road forever. I love the build quality and everything about this car.
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Old 03-21-2019, 09:19 PM   #6
fleetw00d
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The bottom white mark on the tachometer is 0 rpm. The next one up is 500, then the four smaller ones are 600, 700, 800, 900 up to the next large one at 1000.
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Old 03-24-2019, 10:51 AM   #7
Billyboa91ex4dr
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You guys are awesome. With that said itís usual idle spot is 800ish. Sometimes less. I love that car man. I canít believe itís a 91.
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