70 rallye 350 (engine missing)

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Old Mar 20, 2010 | 03:04 PM
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BILL JOZ's Avatar
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70 rallye 350 (engine missing)

The 350 motor has a miss, i have replaced cap, rotor, wires, plugs
points, condenser, coil, checked compression have 150 to 160 and still have miss. Does anyone have any other ideas. Please let me know. Thanks
Old Mar 20, 2010 | 03:20 PM
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Have you checked for a vacuum leak.
Old Mar 20, 2010 | 03:33 PM
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Originally Posted by BILL JOZ
The 350 motor has a mis, i have replaced cap, rotor, wires, plugs
points, condenser, coil, checked compression have 150 to 160 and still have mis. Does anyone have any other ideas. Please let me know. Thanks
It would be helpful if we had a little more info on when the miss occurs. Idle? During acceleration? Highway cruising? What RPM, what load?
Old Mar 20, 2010 | 07:03 PM
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Originally Posted by 70 cutlass s
have you checked for a vacuum leak.
no but i will check , i don't hear any vacuum leak. Thanks
Old Mar 20, 2010 | 07:08 PM
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Originally Posted by joe_padavano
it would be helpful if we had a little more info on when the miss occurs. Idle? During acceleration? Highway cruising? What rpm, what load?
the miss is all the time, but gets worse as it warms up. The car ran
good when i stored it before winter. Then i got it out and had the miss, from idle to acc.
Old Mar 20, 2010 | 07:19 PM
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How old is the gas and did you put StaBil in it when you parked the car for the winter. Could you have water in your gas?
Old Mar 20, 2010 | 07:47 PM
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Originally Posted by redoldsman
how old is the gas and did you put stabil in it when you parked the car for the winter. Could you have water in your gas?
yes i used stabil and i filled the tank. I've done the same thing for
the 8 years i've owned the car, but this is the first time i've had this problem. I have even ran a tank of fuel through it.
Old Mar 20, 2010 | 07:51 PM
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Welcome to our site! Hope the guys can help you figure out the problem.
Old Mar 21, 2010 | 04:11 AM
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Perhaps a stuck valve from sitting?
Old Mar 21, 2010 | 04:45 AM
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As noted above I'd check the vacuum lines. Been there & done that before, let's us know what you find.
Old Mar 21, 2010 | 07:20 AM
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makes me think it would be a carb thing then. when does it miss?
Old Mar 21, 2010 | 03:56 PM
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Originally Posted by highlander
makes me think it would be a carb thing then. When does it miss?
i did have the carb rebuilt last year.
Old Mar 21, 2010 | 04:00 PM
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Originally Posted by scrappie
perhaps a stuck valve from sitting?
this is what i'm going to look into, very good possibility.
Old Mar 21, 2010 | 04:07 PM
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Seems like it would be hard to get 150-160 reading on the compression with a stuck valve. This one is going to be interesting.
Old Mar 21, 2010 | 04:17 PM
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Originally Posted by redoldsman
seems like it would be hard to get 150-160 reading on the compression with a stuck valve. This one is going to be interesting.
i agree but this is what i'm dealing with, i will try to keep everyone
up to date as i get a chance to work on.
Old Mar 21, 2010 | 04:18 PM
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Could a broken valve spring cause a miss
Old Mar 21, 2010 | 05:45 PM
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we would need more info about the miss and how it developed to help, it was before all the new items right? if not maybe the points arnt right, wire not right,ect.
Old Mar 21, 2010 | 06:09 PM
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to vague for me to help.........
Old Mar 22, 2010 | 06:47 AM
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Merged two threads from newbie forum and moved here. Good luck and welcome to CO.
Old Mar 22, 2010 | 08:08 AM
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Originally Posted by BILL JOZ
Could a broken valve spring cause a miss
Last time I broke a valve spring. It also bent the push rod and cracked the rocker arm. It was very hard to start.
Old Mar 28, 2010 | 01:01 PM
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I found the problem, the wire coming through the dist. From points was arching causing the mis. Thanks for all your guy's help
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