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89 460cid wont start

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Old Mar 5, 2011 | 12:45 PM
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89 460cid wont start

My dads 89 F-250, 460cid wont start. Its been sitting for a year because it was running like crap and smoking (Black smoke) bad. It would start up and run really bad before it would get up to temp and than flood and stall. Some one suggested it was the engine temp switch, I replaced it. Than I checked the coil. It was yellow spark, bought a new one and got a nice blue spark. The plugs (all 8) are covered in oil (even dripping). I cleaned them off and and touched them up with some sand paper. Still wont start. I checked the fuel pressure, 40psi (on the rail, both tanks). Tried to start it and the needle didn't move. Check comp, 8.5:1 on #1 piston. I got spark, I got air, I got compression. But still the SOB wont start. I plan on checking the TDC and dizzy after work. Anyone got any good ideas here, Im missing something. Im thinking it has bad gass and maybe the Ignition Control Module is bad. But idk. Any way to check the ICM?
 
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Old Mar 5, 2011 | 02:32 PM
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From: Easton,Ks
Sounds like maybe a bad Fuel Pressure Regulator (FPR).
Pull the vacuum hose off the nipple and turn on the key if fuel comes out of the nipple on top it is bad and your problem.
 
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Old Mar 6, 2011 | 12:48 PM
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Originally Posted by subford
Sounds like maybe a bad Fuel Pressure Regulator (FPR).
Pull the vacuum hose off the nipple and turn on the key if fuel comes out of the nipple on top it is bad and your problem.

Checked that this morning and its dry. I checked for TDC and the rotor, looks good. Im starting to wonder if maybe its a mix of bad fuel and lack of spark, due to bad wires or crappy plugs.
 
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Old Mar 6, 2011 | 01:35 PM
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From: Easton,Ks
Make sure the vacuum line is plugged into the MAP sensor and the wires to it are OK.
 
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Old Mar 6, 2011 | 01:45 PM
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Originally Posted by subford
Make sure the vacuum line is plugged into the MAP sensor and the wires to it are OK.
all that looks good.
 
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Old Mar 6, 2011 | 01:51 PM
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From: Easton,Ks
Check your fuel pressure, it may be too high.
Put a fuel pressure gauge on the fuel rail, ground pin #6 of the self-test plug and turn on the key.
It should be no higher than 45 PSI.
 
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Old Mar 6, 2011 | 01:52 PM
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Originally Posted by subford
Check your fuel pressure, it may be too high.
Put a fuel pressure gauge on the fuel rail, ground pin #6 of the self-test plug and turn on the key.
It should be no higher than 45 PSI.

Its at 40psi
 
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Old Mar 6, 2011 | 01:57 PM
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From: Easton,Ks
You need to check to see if you have any stored codes in CM in the computer.
They may tell you what is wrong.
 
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Old Mar 6, 2011 | 01:59 PM
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Originally Posted by subford
You need to check to see if you have any stored codes in CM in the computer.
They may tell you what is wrong.

Its been sitting a year. The battery was dead for months.
 
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Old Mar 6, 2011 | 02:26 PM
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From: Easton,Ks
When you turn on the key and do not crank the engine does the fuel pump run all the time?
 
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Old Mar 6, 2011 | 04:02 PM
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Originally Posted by subford
When you turn on the key and do not crank the engine does the fuel pump run all the time?
The rear one does but the front one only runs when you first turn the key on or when you crank it over or when you release the pressure from the fuel rail.
 
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Old Mar 6, 2011 | 04:06 PM
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From: Easton,Ks
Sounds like a bad Computer.
The pumps (both) should run for one second and quit.
It also sounds like front pump is bad also or someone has installed the wrong pump.
Releasing the pressure should not cause it to run again.

You could also try putting a noid light on one of the injector plugs and crank the engine and see if it flashes.
If it does not flash and you have spark this would also mean a bad computer.
 
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