The best option is to install a complete PerTronix distributor. The PerTronix installation instructions did do not address those problems at all, and they still don’t. ![]() You must take all the wobble and extra clearance out of the stock point mounting plate as well as the thrust clearance of the distributor gear. Most of the problems with the PerTronix ignitions resulted from the installation of a PerTronix module in a stock distributor. Lots of things can be done simply and cheaply to get an idea of whether things are set up correctly or not. I'm not so sure I'd be hasty in scrapping the motor, checking out cam timing for instance is not that hard and in the process will tell you if the ignition is timed correctly to the crank and whether the timing marks are accurate.As far as the pertronix goes I'd put a conventional HEI in there with it's own temporary 12 volt power source to see what happens. Keep in mind if you swap this for a Chevy motor the tranny attachment to the engine is a different pattern requiring an adapter. It was never a popular engine growing up in the shadow of Pontiac's much larger offerings. The latter came with some nice heads and parts, you should check out the casting numbers and the engine I.D. The Pontiac 350 came in a lot of versions from grocery getter to wanna be performance engine. There's a ton of reasons why this could be from the cam being out of time to lobes or lifters wiped out to the bottom end just being tired. The other concern is the 110 psi compression (assuming this is a wet test) is low. The fact of this is they run like crap on 9 volts and don't last very long on 12 volts. Or they can run on 12 volts as they would when replacing an HEI. One common problem is they are designed to run as a replacement for points ignition which use 12 volts to start and then through a resistor either stand alone or a resistive wire they operate on 9 volts. Pertronix ignitions can be a big problem, it's not a question of loving or hating them, this simple is the reality of them. Thanks for reading this and helping out an old Firebird !!! My gut tells me it is something SIMPLE and maybe a fresh set of eyes will get it going. !!!ĪNYONE out there who has an idea on this I WELCOME the input, I am a 63 year old motorhead and love all the old engines and carbs and distributors, not scared of trying anything and not afraid to say I have not seen something before. My concern is the man working on this car is really a good, seasoned mechanic, so I was shocked that he told me he was about to give up and call the customer who just bought this car, and say come and drag it away. I would be thinking of doing the easier stuff first, like putting in a regular distributor for a test, find verify TDC for number one or number six and starting the distributo install from scratch. Messed up ignition can really have some weird symptoms. Let me know what you think I should do first when I get there to try He cannot see any part numbers on the timing set or on the camshaft The timing marks are lined up like a Chevy right now, which I think for a Pontiac will have it firing the number 6 plug in this position, which I can work with. ![]() This car has a Petronix ignition which I have never worked on, but some people love them and some people say it is junk ? but the compression is 110 pounds in all eight. The man working the problem told me he has been trying to fiqure this out for two weeks, he thought it was a vacuum leak, did smoke test, and leak down test and compression test. The valve train looks new, but also looks stock, nothing exotic about the valve train. ![]() I know very very little about this engine and we know nothing about the camshaft except that it is not a mechanical cam, it is hydraulic. This car has traded hand twice because it does in fact start up, but it idles and runs badlyĪnd the best manifold vacuum reading it has ever had is 8.5. Firebird 400 Firebird 400 Ram Air Crankcase Ventilations Systemįirebird Firebird Sprint Firebird 326 Firebird H.O.I am going to look at a newly built 1969 Firebird 350 4 barrel engine, tomorrow, that has never run well since it was built by someone out of state. Firebird 400 Firebird 400 Ram Air Exhaust Systemįirebird Firebird Sprint Firebird 326 Firebird H.O. Firebird 400 Firebird 400 Ram Air Firebird 400 (Revised 05/12/67) Firebird 400 Ram Air (Revised 05/12/67) Lubrication Systemįirebird Firebird Sprint Firebird 326 Firebird H.O. Car and Body Dimensions Power Teams Engine – Mechanical General Pistons Rings Piston Pins Connection Rods Crankshaft Camshaft Valve Systemįirebird Firebird Sprint Firebird 326 Firebird H.O.
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