and the problems continue, please help

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Jan 10, 2008 | 05:58 PM

donaldderby

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From: three rivers, ma

and the problems continue, please help

ok guys first off thanks for the help last time now i have a new problem. installed a high performance hei ignition system on my 87 f250 with a 351w ho with egr delete, timing is good, spark is good, and its getting fuel. it ran for about five minutes then stopped and now it just turns over and wont catch any suggestions? Thanks for your help beforehand.
-don

Jan 10, 2008 | 09:42 PM

Franklin2

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From: Virginia

Check for spark. Your new ignition might have been a dud. Also make sure the rotor is turning under the cap while you crank the engine.

Jan 12, 2008 | 12:40 PM

donaldderby

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From: three rivers, ma

sorry i probly should have mentioned the spark is good and rotors turning, also the spark hits on the compression stroke as it should. thanks for the help

Jan 12, 2008 | 05:53 PM

Franklin2

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From: Virginia

Pull a plug and see if it's wet with fuel. If it is, the plugs may be fouled and you need to dry them out or get new ones. If they are fouled out, the engine will not even try to fire.

Jan 13, 2008 | 06:50 PM

donaldderby

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From: three rivers, ma

you were right i changed out the plugs and it fired rightup, however it died 5 minutes later when the plugs were pulled the second time(after fireing) they were very dry and very black (fouled Again) also for some reason when its trying to start the carb will start pushing fuel through the tube on top of the bowl. any suggestions

Jan 13, 2008 | 07:26 PM

jade79

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When you checked for spark, was it right after it had quit or after the engine had cooled off for a while? I've seen ignition modules go bad once they heat up, yet restart once they've cooled. If it's the GM HEI style, was the dielectric grease used between the module and dist housing? It helps with heat disipation also.

Jan 13, 2008 | 07:51 PM

donaldderby

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From: three rivers, ma

it was both after it had quit and after it had cooled a while i will admit there was a stronger spark when cooled but still a good spark when hot

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Jan 13, 2008 | 07:58 PM

Franklin2

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From: Virginia

The carb pushing fuel out the top is your problem. That's what's fouling the plugs. The float needle is sticking in the carb, and overfilling the bowel with fuel. Then it runs over into the engine. It works much like the tank on the back of a toilet. If there are rust flakes or dirt in the fuel system, these particles can get into the float needle and hang it open.

Check the carb out. And make sure the fuel filter is good. Most OEM fuel filters are spring loaded, so when they clog, the fuel pump pressure will push them back and let unfiltered fuel go around them. If you find you have a lot of brown stuff in the fuel, you may need a new gas tank.