302 engine will not run.HELP!!!!!
Elder User
Joined: Mar 2004
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The speed density trucks have "bank fire" rather than sequentially fired injectors. That's why all the injectors on one side are wired together. It works okay and it's less complicated.
If your pick up coil and module are working, then I really don't know why it won't run on gas. ?????? Being 1/2 a world away doesn't help, but hopefuly someone here may have some good ideas, that will help you.
If your pick up coil and module are working, then I really don't know why it won't run on gas. ?????? Being 1/2 a world away doesn't help, but hopefuly someone here may have some good ideas, that will help you.
Junior User
Joined: Feb 2001
Posts: 52
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From: Monkton Canada
I was wondering if you checked the spark plugs? It seems to me that if the engine quits on gasoline, you might want to pull the spark plugs out and see if they are wet. If so, then you're getting fuel. Have you checked the spark at the plugs? You could pull a plug out of the engine, reconnect it to the plug wire and ground the threads. Have someone crank the engine over and watch for a spark. It should be a nice blue spark. You say that LPG timing specs are different then gasoline, what controls this? This could giving you problems if it doesn't switch over properly. 
Hope this helps!
Good luck and keep smiling, TR.
Hope this helps!
Good luck and keep smiling, TR.
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Joined: Mar 2004
Posts: 660
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Is the propane still running as your trying to run it on gasoline? If so, then the propane will displace enough air, that with gasoline being injected, the air fuel mixture would be way too rich to burn. You may need to purge the intake before trying to start it. I know from past work in the oil fields that with just a small amount of methanol, or other hydrocarbon, in the atmosphere, that internal combustion engines will not run on gasoline.
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Senior User
Joined: Jun 2004
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From: The Netherlands, Europe
Originally Posted by tgrabak
I was wondering if you checked the spark plugs? It seems to me that if the engine quits on gasoline, you might want to pull the spark plugs out and see if they are wet. If so, then you're getting fuel. Have you checked the spark at the plugs? You could pull a plug out of the engine, reconnect it to the plug wire and ground the threads. Have someone crank the engine over and watch for a spark. It should be a nice blue spark. You say that LPG timing specs are different then gasoline, what controls this? This could giving you problems if it doesn't switch over properly. TR.
Regarding the timing change, that is not controlled, as yet, by anything; What I was trying to say is, that when you run on propane, it requires more advance, to get the maximum mileage out of it; over here, all vehilcles which run on propane, are in fact duel fuel, and only run on gas if one ran the tank empty, or at startup, just for a few moments. This means in practise, that the engine timing is set for propane; when forced to run on gas, take it easy to prevent knock. As said, this engine is still set for gas, and I will leave that until it in fact will run on gas.
The changeover is with a 3 position switch:
A: run on gas
B: run on propane
C: start on gas, when the first time 1500 RPM is reached, it changes over to propane (electronically).
So I now run in position B, but can munually force either run on gas or LPG.
Hope this clearifies your question,
Cor
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Joined: Jun 2004
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From: The Netherlands, Europe
Originally Posted by P51D Mustang
Is the propane still running as your trying to run it on gasoline? If so, then the propane will displace enough air, that with gasoline being injected, the air fuel mixture would be way too rich to burn. You may need to purge the intake before trying to start it. I know from past work in the oil fields that with just a small amount of methanol, or other hydrocarbon, in the atmosphere, that internal combustion engines will not run on gasoline.
I have been running many vehicles on propane, and have fitted several myself, including a '89 Chevy motorhome with a 454 engine, which I still own. Runs great on both fuels; this is the last year with a carburettor; when changing over while driving the procedure has always been, from gas to LPG: select swith mid position = no fuel at all, until the engine begins to hesitate, then select propane, and it will pick up immediately; this is to empty the carburetter.
From propane to gas, just flick the switch; the second or so to fill the carb float chamber it just runs of the remains of LPG in the mixer and manifold.
Now, I never installed propane on an injection vehicle, and have no experience myself with injection engines, so far; I am now thrown in at the deep end, and learning fast, with all your people's help. This vehicle was converted by a State approved installer.
To answer the specific question: no, I do not , and can not supply 2 fuels at the same time.
Cor
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