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 Posted: 12-05-2010 01:24 am
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jarnol123
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If you're a regular you've probably seen some of my posts and my problems trying to start my jensen.

Here's what I've done so far...

1. installed new pertronix flamethrower and ignitor.
2. Verified spark is good.
3. checked fuel is getting to dellorto carbs..no blockages.
4. when i do crank and then stop I noticed some smoke coming out of the carb when i open the throttle manually (#4 cylinder).

When i crank the engine turns over no problem but won't start...i get a "puffing" type noise like it's trying to start but can't.

Any ideas?

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 Posted: 12-05-2010 04:18 pm
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Brett Gibson JH5 20497
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Not enough info .......

Do a compression test to see if your engine is any good

Align the crank at TDC, do the cam marks line up, is the distributor rotor pointing at the #1 spark plug lead, pull the #1 plug is the piston at the top, do you have the spark plug wires in the right firing order, whats the condition of the cap and rotor, any carbon build up ......

Did you clean up the wiring connections.

Did the car run before what ever you did to it, can you undo what you did to see if it will run.

Is this the car that was turning over slow ???

I feel bad for you but you need to verify the basic's, Dell's are another issue entirely but if you havent touched them since it did run, (Knockwood). they may not be a problem.

Brett

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 Posted: 12-05-2010 04:25 pm
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jarnol123
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Ok compression was fine last time it ran but a little low. I did the alignment..fine..spark at #1 plug. Wires in correct firing order, etc. cap and rotor are new. some carbon build up on spark plug #4...this is the only one that gets carbon build up..
One thing I do notice..and this has been constant throughout all of this effort...is that the engine shakes a lot during cranking and I seem to have exhaust smoke coming out about half way back of the car. Is it possible that the exhaust could be blocked and this is why the car won't start?


Brett Gibson JH5 20497 wrote:
Not enough info .......

Do a compression test to see if your engine is any good

Align the crank at TDC, do the cam marks line up, is the distributor rotor pointing at the #1 spark plug lead, pull the #1 plug is the piston at the top, do you have the spark plug wires in the right firing order, whats the condition of the cap and rotor, any carbon build up ......

Did you clean up the wiring connections.

Did the car run before what ever you did to it, can you undo what you did to see if it will run.

Is this the car that was turning over slow ???

I feel bad for you but you need to verify the basic's, Dell's are another issue entirely but if you havent touched them since it did run, (Knockwood). they may not be a problem.

Brett

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 Posted: 12-06-2010 01:21 am
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jarnol123
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Ok...I can get it running briefly when I spray carb cleaner into the body with the throttle open.  I know gas is getting to the dellorto carb but it seems it's not getting to the engine.

What are the known causes of carb blockage? I need to run through them to see why gas isn't getting through the carb.

Can anyone give me a 1,2,3, step guide? I mean there can't be many places where the gas would get blocked, right?

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 Posted: 12-06-2010 02:10 pm
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Brett Gibson JH5 20497
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you might have gotten something into the carbs that is plugging or reducing the gas flow, do you have a filter on the gas feed line. Try pulling the jets and cleaning them up, if possible check what your gasline pressure is, should be around 3.5 psi, give or take.

And yes if the exhaust is blocked it wont let you run, not sure what could cause that.

Brett  

Last edited on 12-06-2010 02:14 pm by Brett Gibson JH5 20497

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 Posted: 12-06-2010 03:32 pm
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jarnol123
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Ok will do.

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