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U13 BB Owner
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Discussion Starter #1
Okay my mind has been exploding on why my car is having a rough idle..and now some times hesitant when i jump on the peddle. I baby the shit out of this car with regular maintence and i dont know why shes giving me a hard time... Now the other day i checked my timing and somehow i was advance to the last marker..i think 20..(dont know how) So i retarded the timing to like 13. Adjusted the idle while i was at it. Rechecked and still had the problem. Now im messing with the egr system and when i pushed up on the egr valve the car almost died but it didnt it. It acted like it was going to stall but never did. Is that right? Would a leak in the egr tube (from header to egr valve) cuase this? Im going out today and recheck the gaps in my spark plugs...check all vacuum hoses..clean the iacv and tb. Please any help??
 

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Wise Cracker
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5,730 Posts
200sx98fl said:
Okay my mind has been exploding on why my car is having a rough idle..and now some times hesitant when i jump on the peddle. I baby the shit out of this car with regular maintence and i dont know why shes giving me a hard time... Now the other day i checked my timing and somehow i was advance to the last marker..i think 20..(dont know how) So i retarded the timing to like 13. Adjusted the idle while i was at it. Rechecked and still had the problem. Now im messing with the egr system and when i pushed up on the egr valve the car almost died but it didnt it. It acted like it was going to stall but never did. Is that right? Would a leak in the egr tube (from header to egr valve) cuase this? Im going out today and recheck the gaps in my spark plugs...check all vacuum hoses..clean the iacv and tb. Please any help??
If the EGR was not functioning you should get a CEL. You can check the function of the EGR through various tests depending on which part you suspect is going bad. The FSM has these procedures outlined.
 

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U13 BB Owner
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303 Posts
Discussion Starter #3
wes said:
If the EGR was not functioning you should get a CEL. You can check the function of the EGR through various tests depending on which part you suspect is going bad. The FSM has these procedures outlined.
well i checked the actual valve by pushing it up nd it goes up and down...when the car is on if i push it up it doesnt stall...it acts like it bad but doesnt....also i know the egr tube is leakinging cuase its homemade...just wondering if that could be whats affecting my idle.
 

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if you're having a rough idle, try cleaning the throttle plate and seeing where that gets you. if you have too much carbon built up on there, it won't seat right at idle and mess up the air flow. get a can of throttle body cleaner (stay away from carb cleaner for a job like this cos it can do more harm than good) and take off the air intake duct and while turning the throttle lever with one hand, spray the cleaner on the plate. if you've never done this before, you probably need to. sometimes you'll need to spray and then scrub it off with a finger or old toothbrush. the carbon will be a black deposit that looks like old oil or grease. use as much as you need to until the throttle body and plate are nice and shiny. then start the car -- it won't stay running at first because it'll have to burn away all the cleaner you sprayed in there. you may have to start it and then hold the accelerator down for a few seconds. but that should make a pretty noticible difference.

I've also had pretty good luck with a product called Seafoam. it came highly recommended in maxima.org. you start your engine, then take off the vacuum line to the brake booster, and pour this stuff in there to clean out the whole intake. then stop the engine for a few minutes, and then start it back up.

just thoughts on some stuff you might wanna try.

Dan
 
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