No start 460, I'm stumped
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No start 460, I'm stumped
Truck sat for a week, now it won't start. Using jumpers I can hear the fuel pumps cut on. I replaced fuel relay, no help. Fuel cutoff/accident reset switch under dash was not tripped. Starter fluid into throttle body gets nothing either. Cleaned all connections at starter relay and battery, no help there either. It turns over like a champ but does not start. I've now beat this dog for a week and I can admit when I'm stumped...I'm stumped. I figure it is something simple, I just can't put my finger on it. Oh yes, changed fuel filter also. Any help would be appreciated. I have no codes since I have no reader. Thanks in advance!
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Used one of those glow tube testers....orange spark, NOT what I expected. Truck has 80,000 miles on it, figured I was good on chain. I am no whiz with all the electrical but suspect power to fuel pump not coming on there and possibly someplace else (like Distrib)....EEC relay maybe? When switch is turned to 'on' I used to hear fuel pumps, not anymore. I jumped them at relay to make sure they still worked, they do. Thanks for all your help! I need it!!!! Have a good one!
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From: Union, Washington
The engine should have at least fired (not stay running, but fired at least) with the starting fluid. Since it did not, I don't thing you have a fuel problem. If you can't make the engine burn starting fluid, it sure as he!! won't burn gas. It is either ignition or a mechanical problem with the motor. Most likely ignition.
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Cleaned computer ground at neg terminal at battery (I was hoping) no diff. Checked for spark from coil to dist...nothing, gonna go get a coil tomorrow. Progressively less and less spark and now none at all. Thanks for all the help!
Last edited by bigdogpc; Jul 13, 2006 at 03:41 PM.
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Joined: Mar 2001
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From: So Cal
Don't know what year 460 you got so have to make some assumptions...
Did it run well before you let it sit?
How did you get starting fluid into the TB? If you removed the air flow sensor or whatever Ford calls the thingie before the TB, it may not want to fire. I don't think the computer controlled engines will run with the sensor pulled off the "snorkle". Also if you had to remove the sensor to spray the fluid into the TB, I wonder if the fluid evaporates before you replace the sensor. Just an idea.
Sounds like coil or rotor could be a cause of no spark. Also maybe your plug wires are old and marginal. When was the last time you replaced or inspected the inside of the distributor cap? Sometimes they get carbon tracking or dirt which kills the spark. Is there moisture inside the cap? Clean connections to plug wires? Your plugs are OK?
Good Luck,
Jim Henderson
Did it run well before you let it sit?
How did you get starting fluid into the TB? If you removed the air flow sensor or whatever Ford calls the thingie before the TB, it may not want to fire. I don't think the computer controlled engines will run with the sensor pulled off the "snorkle". Also if you had to remove the sensor to spray the fluid into the TB, I wonder if the fluid evaporates before you replace the sensor. Just an idea.
Sounds like coil or rotor could be a cause of no spark. Also maybe your plug wires are old and marginal. When was the last time you replaced or inspected the inside of the distributor cap? Sometimes they get carbon tracking or dirt which kills the spark. Is there moisture inside the cap? Clean connections to plug wires? Your plugs are OK?
Good Luck,
Jim Henderson
Post Fiend
Joined: Mar 2004
Posts: 6,056
Likes: 8
From: Union, Washington
Originally Posted by jim henderson
Don't know what year 460 you got so have to make some assumptions...
Did it run well before you let it sit?
How did you get starting fluid into the TB? If you removed the air flow sensor or whatever Ford calls the thingie before the TB, it may not want to fire. I don't think the computer controlled engines will run with the sensor pulled off the "snorkle". Also if you had to remove the sensor to spray the fluid into the TB, I wonder if the fluid evaporates before you replace the sensor. Just an idea.
Sounds like coil or rotor could be a cause of no spark. Also maybe your plug wires are old and marginal. When was the last time you replaced or inspected the inside of the distributor cap? Sometimes they get carbon tracking or dirt which kills the spark. Is there moisture inside the cap? Clean connections to plug wires? Your plugs are OK?
Good Luck,
Jim Henderson
Did it run well before you let it sit?
How did you get starting fluid into the TB? If you removed the air flow sensor or whatever Ford calls the thingie before the TB, it may not want to fire. I don't think the computer controlled engines will run with the sensor pulled off the "snorkle". Also if you had to remove the sensor to spray the fluid into the TB, I wonder if the fluid evaporates before you replace the sensor. Just an idea.
Sounds like coil or rotor could be a cause of no spark. Also maybe your plug wires are old and marginal. When was the last time you replaced or inspected the inside of the distributor cap? Sometimes they get carbon tracking or dirt which kills the spark. Is there moisture inside the cap? Clean connections to plug wires? Your plugs are OK?
Good Luck,
Jim Henderson
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Truck is 1990. Pulled snorkel tubes, shot starter fluid in both barrels of efi. Perhaps I am using wrong terms for components? Truck is EFI. Throttle body to me is where the throttle linkage is. Have no clue where this sensor ya'll are talking about is. I simply pulled the air intake tubes/hoses (2), sprayed starter fluid and cranked. The first time it sputtered then would do no more. Would the EEC relay cause this? Thanks again! Oops, forgot, prior to sitting for a week the truck ran like a scalded dog! No problems, fired right up everytime. Of course, I haven't had it that long nor been that many places with it.