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I have checked just about everything I know to check. I did a search and I have read every post there has been on this issue and believe me there is alot of them. I used a Snap-On scan tool and came up with 2 codes (IAT sesor, EVR) and replaced both of them. I replaced the fuel pump, checked the fuel regulator, TPS and IAC. I did not how ever check to see if some how the IAC was clogged. I just rebuilt the engine and I know it does not need a tune-up. I checked for vacum leaks and found none. The guys at the auto shop here on post were helping me and decided to put the truck on the IM machine. We noticed that when the engine was cold the engine seemed to run lean, but when warm the engine ran rich. ???
I have noticed that when driving about 35/40 mph there is a slight shutter. I read some on a post were this guy replace his torque converter and it stopped. I don't think it's that. I don't think that this would make it run lean then rich.
I need heeeeeelp if it's out there.:crybaby2:
 

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When you did all the work did you replace the fuel filter? I changed mine when it was sputtering and that was the prob. I hope it is that simple. Good luck
 

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I had the same problem and it was the TPS and IAC, replace the TPS and see what happens.
The engine would kick me back during normal city driving and it would hi 5-4000 RPMs.
 

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im having the same problem and i was told that it was my carberator itself,but i havent checked my filter yet.normaly when my filter clogs it just wont start or stay runnin,then if i let it sit ill start again.right noe its doing the exact same thing though,right around 3500-4500rpms it start to sputter and sometimes she'll sputter from the start then she goes and then sputter for a minute.i hope someone can help cause im lost too.
 

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My work Van (94E350) was doing this. It was the TPS as Mike said...
 

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The TPS cost me about $55, I recomend using a phillips socket
(if you dont have one,buy one) since its too tight for a regular screwdriver, and lack of space.
 
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