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Old 03-10-2009, 05:41 PM
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need help with a Pontiac 301

So my brother in law and I purchased him a 1979 Firebird with a Pontiac 301 engine. When we got the car the guy had told us that the problem was with the timing chain so we replaced it and yet still no luck, so we tried many other things to get it to start and it wont. This last weekend we had a GM certified mechanic come and take a look to see if he could figure out what was wrong and no luck there either. We have fuel, compression, and spark so when we go to turn the key it sounds like it wants to start but it doesn't. If you have ever had this problem or might have any idea what it could be your help would be great.

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Old 03-10-2009, 05:46 PM
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Question is... is it proper fuel and spark? Usually when it almost fires and catches, it needs more initial timing. Too much timing will kickback or backfire through the carb.

Are you sure the carb is delivering fuel to the engine? clogged jets, plugged filter, faulty fuel pump?

Also... be more specific about the "turning the key" part. Is the engine spinning over normally, or is the starter sluggish? Big difference.
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Old 03-10-2009, 05:47 PM
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Are you using the correct cylinder for No. 1 cylinder. Pontiac motors are one of the few GM motors that the farthest forward cylinder is not No.1!.. Is the cap wired in the correct direction/firing order?. Was the timing set installed correctly?
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Old 03-10-2009, 05:54 PM
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yeah it is the right fuel and spark and the starter is turning over normally, we have put starter fluid and gas directly into the carb and we still haven't even got it to backfire yet for us and Bob yeah we believe it is wired correctly if you have a diagram that would help a lot
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Old 03-10-2009, 06:38 PM
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Hi,
The firing order is
1, 8, 4, 3, 6, 5, 7, 2 rotation is CC.
#1 cyl is the first cylinder on the drivers side
It's just like a Chevy.
Rich
PS I would assume that buy now the plugs are soaked, try taking them out & letting thing dry up some while you check the wiring & rotor postilion, just to be sure it's pointing to
#1 when at TDC

Last edited by richard stewart 3rd; 03-10-2009 at 06:44 PM.
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Old 03-10-2009, 06:41 PM
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Quote:
Originally Posted by richard stewart 3rd
Hi,
The firing order is
1, 8, 4, 3, 6, 5, 7, 2 rotation is CC.
#1 cyl is the first cylinder on the drivers side
It's just like a Chevy.
Rich
thank you richard, that is how we have it lined up
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Old 03-10-2009, 06:59 PM
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have you verified that your getting spark at the plugs?
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Old 03-10-2009, 07:01 PM
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yeah thats one of the things the GM certified mechanic did when he came up to my house. i have talked to Joe from the 301 Garage website and he is thinking it might be the ignition module so this weekend i will get it tested and let you guys know how it goes
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Old 03-10-2009, 07:38 PM
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i believe a pontiac distributor rotates in clockwise direction.
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Old 03-10-2009, 07:45 PM
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Check it out.
Rich

http://www.boxwrench.net/specs/pont_265-455.htm
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Old 03-10-2009, 07:45 PM
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Quote:
Originally Posted by 1930u
i believe a pontiac distributor rotates in clockwise direction.
no a 301 is counter clockwise
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Old 03-10-2009, 07:51 PM
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Quote:
Originally Posted by richard stewart 3rd
yeah that is how we have it, starts at the closest to the driver seat
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Old 03-10-2009, 07:56 PM
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#7 is closest to the drivers seat, #1 is close to the radiator
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Old 03-10-2009, 08:03 PM
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Quote:
Originally Posted by richard stewart 3rd
#7 is closest to the drivers seat, #1 is close to the radiator
wait it starts like this right,


..8..1
4......2
3......7
..6..5

right?
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Old 03-10-2009, 08:13 PM
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I was confused about what you were talking about at that time,
It really doesn't make any difference where you put #1 on the dist. (because it goes in a circle) as long as the rotor is pointing to where #1 is plugged in on the cap when at TDC ready to fire.
Rich
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