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Old 04-03-2004, 07:17 AM
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Carb kit

My 87 caprice seems to start up pretty rough in the morning.
It has a 305 with a rochester quadrajet
I bought a carb rebuild kit for it.
I have never rebuild a carb before.

Is this a job i should tackle my self? Or should i find someone who knows what their doing
Thanks

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Old 04-03-2004, 07:22 AM
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It doesn`t sound to me as if the carb needs rebuilt, it sounds like the choke needs adjusted. if it only runs rough when it`s cold and not after it warms up, the carb don`t need built, adjust the choke and get your money back on the rebuild kit.
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Old 04-03-2004, 08:47 AM
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not only does it start up rough, but it also seems to hesitate a little from a stop. Also the gas milage seems to be getting worse and worse.
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Old 04-03-2004, 07:25 PM
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I say build it then, get a few cans of carb cleaner, make sure you clean all the passages. Q-jets are rather simple carbs, but for someone who`s never did it before, my best advice would be pay very very close attention of how it comes apart, it does appear complicated by a novice`s eyes, I was terrorfied of one before I watched closely one being reassembled, after that it was a breeze. see if you can find a buddy that knows how to do so, and he can teach you. if not get a automotive book that has Q-jet rebuilding in it`s chapters.
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Old 04-03-2004, 07:33 PM
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Carb Kit

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I say build it then, get a few cans of carb cleaner, make sure you clean all the passages. Q-jets are rather simple carbs, but for someone who`s never did it before, my best advice would be pay very very close attention of how it comes apart, it does appear complicated by a novice`s eyes, I was terrified of one before I watched closely one being reassembled, after that it was a breeze. see if you can find a buddy that knows how to do so, and he can teach you. if not get a automotive book that has Q-jet rebuilding in it`s chapters.
I was about to write this same post. The same thing is going on with my 81 Century. I have another extra carb, you think i should disassemble it and experiment before i would do the one on the car??
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Old 04-03-2004, 07:35 PM
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The '87 Caprice 305 Qjet will probably be a CCC feedback carb. While they have a lot of similarities to the basic Qjet, there are some very critical measurements on the metering rod setting. Also, its very easy to break off the plunger on the TPS when taking the top off the carb. If you break it off, you'll be taking a trip to the dealer for a new Throttle Position Sensor, IF they have one. Remember, the car is 17 years old and the dealers rarely keep parts around that long.

Personally, I suspect there is another problem causing the missing and shaking.

Mark
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Old 04-04-2004, 10:17 AM
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yea when the car is first started in the morning it skes a lot.
i have to keep my foot on the throttle for about to mins before it will catch a good descent idle.

this is a computer controlled carb
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Old 04-04-2004, 11:26 PM
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Sounds like the choke plate or choke spring is a little too tight or the choke unloader (pulloff) is blown or maladjusted causing the engine to "load up" and foul the plugs when cold. Check the pulloff by disconnecting it with the engine running and see if it extends, then reinstall the hose to see if it retracts. It never hurts to rebuild it. I rebuild my carburetors every few years whether they need it or not just for maintenance reasons. The kits are around $40.
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