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rough idle

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Old Dec 10, 2018 | 06:40 PM
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im back folks getting kinda tired of putting the website into my browser... oh well. I got a loss of power again on the throttle, this time it is severly affecting my idle and it has no warnings. makes it sound like a lope tune has been applied. im thinking fuel pump/filter but I wanted a sanity check from someone much more experienced than myself before I blow 250 buck on a pump assembly. thanks
 
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Old Dec 10, 2018 | 07:53 PM
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Might help if you would add details about the vehicle in question. Year, engine, transmission, etc.....
 
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Old Dec 10, 2018 | 09:58 PM
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1997 1500 5.2 gas it has no catalytics at the moment or an evap camnister but it hasn’t given me issues and I took the cats off because I thought they were clogged everything else other that the throttle body is stock it’s an auto trans couldn’t tell you what model
 
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Old Dec 10, 2018 | 10:06 PM
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97 means no test port for fuel pressure....

Any pattern to the behavior?
 
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Old Dec 10, 2018 | 10:11 PM
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None that’s noticeable other than it will start fine and drive fine for a couple minutes then I get a loss on the throttle and a rough idle
 
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Old Dec 10, 2018 | 10:14 PM
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Replace the oxygen sensor. The PCM ignores it till it warms up, takes a couple minutes..... NTK or Denso only please. Skip the bosch sensors, our trucks don't like 'em.
 
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Old Dec 11, 2018 | 11:21 AM
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02 sensor is brand new it’s also only running sensor 1 cause I haven’t put the hole for the second one in the new pipe yet
 
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Old Dec 11, 2018 | 11:25 AM
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What brand sensor?
 
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Old Dec 11, 2018 | 12:12 PM
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whichever one autozone hands out might be a bosch I also ran injector cleaner and seafoam through on half a tank had no effect other than some smoke also found out that if I sit on the throttle lightly it will putter then slowly drop in RPM till it stalls out takes about 90 seconds. local thought is either water in the coil pack (if this truck has one) from Florence or clogged injectors.
again thanks to everyone for the help
 
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Old Dec 11, 2018 | 12:25 PM
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Originally Posted by cman9898
whichever one autozone hands out might be a bosch I also ran injector cleaner and seafoam through on half a tank had no effect other than some smoke also found out that if I sit on the throttle lightly it will putter then slowly drop in RPM till it stalls out takes about 90 seconds. local thought is either water in the coil pack (if this truck has one) from Florence or clogged injectors.
again thanks to everyone for the help
Can't use Bosch it won't work
 
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