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'89 3.0 rough running, need help Forums > > '89 3.0 rough running, need help '89 3.0 rough running, need help
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  #1  
Old 07-14-2016, 03:32 PM
joe5150 joe5150 is offline
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1998 Pathfinder
 
Join Date: Oct 2009
Posts: 25
Default '89 3.0 rough running, need help

it started intermittently losing power accelerating, then I parked it for the last month, now ive had some time to check some things, its not starting easy after sitting cold, pumping throttle gets it going, im seeing 36 psi fuel pressure, after it gets running, its smooth at 1200 rpm, where it wants to idle high, when I rev it at 3200 its missing like its starving for fuel, surging, and driving it cant get out of its own way. I did the mode 3 check for codes, and it had none, the 55, alls good. I know these tbi's are weird, cycling the injector activity, but its not easy to see how much fuel its moving, visibility down throat is marginal, im wondering maybe im overlooking something, thanks for any thoughts in advance.
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Old 07-15-2016, 08:34 AM
joe5150 joe5150 is offline
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1998 Pathfinder
 
Join Date: Oct 2009
Posts: 25
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when I rev it and spray either down the throat its revving up, showing its running too lean, im going to research tps and o2 sensors, can someone tell me what the drivers side of the tbi sensor is? big rectangle with plug to rear.
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Old 07-18-2016, 02:16 PM
joe5150 joe5150 is offline
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1998 Pathfinder
 
Join Date: Oct 2009
Posts: 25
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update, now it wont start, ive got no spark, pcm is reading a code 11 crank or cam sensor, I went and got coil and igniter, and distributor, after seeing a lot of ckp failure, but ive still got the problem.
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  #4  
Old 08-16-2016, 12:07 AM
jbpath jbpath is offline
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1987 Pathfinder
 
Join Date: May 2016
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Air flow meter with out that u wont start. From my exp.i replaced my tbi gaskets to intake. Make sure the vacuum is all correct and ur emissions purge valves .

Last edited by jbpath; 08-16-2016 at 12:13 AM.
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