'93 460 sputter/ throwing no codes..
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Tuned
Joined: Nov 2007
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'93 460 sputter/ throwing no codes..
last friday my truck all of a sudden starting missing/sputtering while driving down the road and has been getting worse each day and running rich.
The truck is a 93 f350 with a 460 5 speed.
It was running great then starting acting up.
I did fill up 1 tank on new gas 20 minutes before it starting acting up.
What all i have done since is..
Switch tanks to try different gas along with a new fuel filter.
new cap and rotor, took the cat. converter off and it is gutted already, checked plugs(were black), checked for vaccum leaks. But so far everything isn't making a difference.
And i haven't had the check engine light come on, but scanned it and its not getting any codes.
It starts fine each time with no problems too. and there isn't any smoke.
Any ideas on what it could be?
It still has a slight sputter and the throttle isnt all there.
The truck is a 93 f350 with a 460 5 speed.
It was running great then starting acting up.
I did fill up 1 tank on new gas 20 minutes before it starting acting up.
What all i have done since is..
Switch tanks to try different gas along with a new fuel filter.
new cap and rotor, took the cat. converter off and it is gutted already, checked plugs(were black), checked for vaccum leaks. But so far everything isn't making a difference.
And i haven't had the check engine light come on, but scanned it and its not getting any codes.
It starts fine each time with no problems too. and there isn't any smoke.
Any ideas on what it could be?
It still has a slight sputter and the throttle isnt all there.
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Tuned
Joined: Nov 2007
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update! I am getting it to finally throw black sooty smoke under a heavy load up a hill or so, but them goes away when you let off the gas.
I still cant get codes to come up.
Replaced the map sensor, fender module, air bypass sensor all from my other running turck and still no luck
ANY IDEAS GUYS?
I still cant get codes to come up.
Replaced the map sensor, fender module, air bypass sensor all from my other running turck and still no luck
ANY IDEAS GUYS?
Thread Starter
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Tuned
Joined: Nov 2007
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i changed the computer and the truck seems to run alittle better and alot less smoke now.
I was able to bring up some codes now too.
p0174
p1744
p0401
p1131
p0171
p0440
Would all of these self clear out them selves and it is slowly getting better?
I was able to bring up some codes now too.
p0174
p1744
p0401
p1131
p0171
p0440
Would all of these self clear out them selves and it is slowly getting better?
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
Those are OBD-II codes. Your truck is OBD-I, with two to three digit codes. How did you retrieve the codes you listed?
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Tuned
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Fleet Owner
Joined: Oct 2005
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From: Kentucky
An OBD-I code reader will never show Pxxxx codes. Those are OBD-II codes.
For reference: Fuel Injection Technical Library » 3 Digit Self-test Codes 111-171
For reference: Fuel Injection Technical Library » 3 Digit Self-test Codes 111-171
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Tuned
Joined: Nov 2007
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I decided to buy my own scanner, and here is the codes it gave me..117,122,126,212,327,332,334,337,553, and then it gave me a 10. Would my egr be the main cuprit?as the crankcase vent hose has alot of exhaust gases inside it.
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
First off it looks like you did the codes on a cold engine (117).
You did not say if the codes are KOEO, CM or KOER codes.
Some of the codes are only KOEO, some are only CM or KOER.
As the codes can have different meanings depending on the type of code.
Some may be very old codes so you need to clear the codes, drive the truck and then check the codes with a warm engine.
You also need to check the vacuum lines on the engine and the wiring harness for its condition before you run the tests again.
You did not say if the codes are KOEO, CM or KOER codes.
Some of the codes are only KOEO, some are only CM or KOER.
As the codes can have different meanings depending on the type of code.
Some may be very old codes so you need to clear the codes, drive the truck and then check the codes with a warm engine.
You also need to check the vacuum lines on the engine and the wiring harness for its condition before you run the tests again.
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
It would still would be nice to know if they were KOEO or CM codes.
But if the wiring is OK and the vacuum lines are OK then it does not look good for the PCM Computer as that many things do not go bad all of a sudden.
But if the wiring is OK and the vacuum lines are OK then it does not look good for the PCM Computer as that many things do not go bad all of a sudden.
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Tuned
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I went ahead and cleared the codes last nite and drove it today. The only codes i now get are 553 in keo mode, then it gives me 332 in continous mode. But the truck does still seem to be using alot of gas and blows out the black smoke(like a diesel) under a load. Would the fuel pressure regulator be bad?
Tuned
Joined: Oct 2012
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I went ahead and cleared the codes last nite and drove it today. The only codes i now get are 553 in keo mode, then it gives me 332 in continous mode. But the truck does still seem to be using alot of gas and blows out the black smoke(like a diesel) under a load. Would the fuel pressure regulator be bad?
My 460 truck was blowing black smoke when I first got it. It ended up being the computer bad. But, I also couldn't retrieve codes so that's usually a major sign that the comp. is bad. Since you can retrieve codes, the odds are less likely.