3.0 random stutter, wont accelerate.
#21
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Older ECM's are difficult to test. The most you can do is back probe the connectors with everything plugged in and check voltages, as far as functionality goes there might be some tests you can do as per the FSM but it will be pretty limited.
#24
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Pretty hard to fry an ecm unless you pour water on it. or plug some high voltage into it somehow. I am leaning on a component issue as well.
#25
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Thread Starter
Yea water hasnt been an issue in my truck. I saw in the fsm the fuel pump its self has a filter. Has this ever plugged up on anyone. The fuel in my filter look horrifically dirty on the entry side.
#26
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yes, those socks are prone to plugging up. The inside of the tank gets pretty rusty so if you go lower than 1/4 tank of fuel you can plug up that sock really easily.
#28
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I know when my tank in the 88 was full of rust i attempted to flush it out but the rust got so bad that it didnt matter how many times i flushed the tank it still plugged off the sock. Some cases its just simpler to replace the tank. If the sock is plugged it could be part of the issue with whats going on but i'm not 100% sure it will be the only problem.
#30
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For sure, the wife's started otu as intermittent and it is progressively getting worse. She says its pretty much everytime she drives the truck now it stutters and shakes, I really think it does have something to do with fuel delivery tho, once the truck gets to operating temps and the CSI isn't dumping that extra fuel in there is literally no smoke coming from the tailpipe when normally when its really cold like it has been there is smoke.
#32
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Have you pulled the intake air tube off and inspected the throttle body for carbon buildup? Often times, carbon will build up around that butterfly plate, and wont allow the throttle to fully close, thus throwing tps readings out of whack.
Your IAC valve could be gunked up also. With that many miles... it might be a good idea to "sea foam" it a couple times to clean up any carbon.
Guess I missed this....
YEah... if the filter is clogging due to rust in the tank, likely the sock on the pump is clogged as well, and the fuel pump has prolly overheated from not getting enough fuel to keep it cool. I'd def start by pulling the tank, and the pump, and have a look....
Its not uncommon to have a really dirty fuel filter depending on how many years since it was last replaced tho....
Your IAC valve could be gunked up also. With that many miles... it might be a good idea to "sea foam" it a couple times to clean up any carbon.
YEah... if the filter is clogging due to rust in the tank, likely the sock on the pump is clogged as well, and the fuel pump has prolly overheated from not getting enough fuel to keep it cool. I'd def start by pulling the tank, and the pump, and have a look....
Its not uncommon to have a really dirty fuel filter depending on how many years since it was last replaced tho....
Last edited by Team420; 01-15-2014 at 12:55 PM.
#35
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Its part of the tb.... Only way I know of to clean it is to pull the tb, which is simple, and takes about 5min.... rtv silicone works fine to seal her up again when you re-install.
Guess I missed this....
YEah... if the filter is clogging due to rust in the tank, likely the sock on the pump is clogged as well, and the fuel pump has prolly overheated from not getting enough fuel to keep it cool. I'd def start by pulling the tank, and the pump, and have a look....
Its not uncommon to have a really dirty fuel filter depending on how many years since it was last replaced tho....
YEah... if the filter is clogging due to rust in the tank, likely the sock on the pump is clogged as well, and the fuel pump has prolly overheated from not getting enough fuel to keep it cool. I'd def start by pulling the tank, and the pump, and have a look....
Its not uncommon to have a really dirty fuel filter depending on how many years since it was last replaced tho....
Last edited by Team420; 01-15-2014 at 12:57 PM.
#36
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Thread Starter
Its part of the tb.... Only way I know of to clean it is to pull the tb, which is simple, and takes about 5min.... rtv silicone works fine to seal her up again when you re-install.
Guess I missed this....
YEah... if the filter is clogging due to rust in the tank, likely the sock on the pump is clogged as well, and the fuel pump has prolly overheated from not getting enough fuel to keep it cool. I'd def start by pulling the tank, and the pump, and have a look....
Its not uncommon to have a really dirty fuel filter depending on how many years since it was last replaced tho....
Guess I missed this....
YEah... if the filter is clogging due to rust in the tank, likely the sock on the pump is clogged as well, and the fuel pump has prolly overheated from not getting enough fuel to keep it cool. I'd def start by pulling the tank, and the pump, and have a look....
Its not uncommon to have a really dirty fuel filter depending on how many years since it was last replaced tho....
#37
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Yeah... pumps usually work, or not.. BUT... if its getting clogged up by rust, gunk, etc... it could cause intermittent problems, and will certainly shorten the life of the pump considerably. A fuel pump needs to pump fuel consistently to keep it cool.
#38
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Alright. Ill report what I find
#39
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Just keep in mind... if you find a rust bucket of a tank, you will need to replace the tank, the pump, and the sock... NOT just the tank, else you may end up having to drop that tank all over again. Ypu MIGHT get away with just a new tank, but doubtful.... I speak in terms of experience on this one
#40
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Thread Starter
Just keep in mind... if you find a rust bucket of a tank, you will need to replace the tank, the pump, and the sock... NOT just the tank, else you may end up having to drop that tank all over again. Ypu MIGHT get away with just a new tank, but doubtful.... I speak in terms of experience on this one