70 rallye 350 (engine missing)

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March 20th, 2010, 03:04 PM

BILL JOZ

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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

March 20th, 2010, 03:20 PM

70 cutlass s

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Have you checked for a vacuum leak.

March 20th, 2010, 03:33 PM

joe_padavano

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Quote:

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?

March 20th, 2010, 07:03 PM

BILL JOZ

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Quote:

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

March 20th, 2010, 07:08 PM

BILL JOZ

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Quote:

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.

March 20th, 2010, 07:19 PM

redoldsman

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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?

March 20th, 2010, 07:47 PM

BILL JOZ

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Quote:

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.

March 20th, 2010, 07:51 PM

cutlassgal

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Welcome to our site! Hope the guys can help you figure out the problem.

March 21st, 2010, 04:11 AM

scrappie

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Perhaps a stuck valve from sitting?

March 21st, 2010, 04:45 AM

#10

sworthy555

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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.

March 21st, 2010, 07:20 AM

#11

highlander

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makes me think it would be a carb thing then. when does it miss?

March 21st, 2010, 03:56 PM

#12

BILL JOZ

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Quote:

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.

March 21st, 2010, 04:00 PM

#13

BILL JOZ

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Quote:

Originally Posted by scrappie

perhaps a stuck valve from sitting?

this is what i'm going to look into, very good possibility.

March 21st, 2010, 04:07 PM

#14

redoldsman

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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.

March 21st, 2010, 04:17 PM

#15

BILL JOZ

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Quote:

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.

March 21st, 2010, 04:18 PM

#16

BILL JOZ

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Could a broken valve spring cause a miss

March 21st, 2010, 05:45 PM

#17

highlander

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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.