93 J30t....
Everything runs perfect...but...occasionally when stopped, the idle will fall to near stall (approx. 400-500 rpm)...and then after 15 seconds will jump up to normal again.
I've figured out that it's doing it when the engine fan turns on...question is, why?
MF
J30 idle weirdness....
VimyJ wrote:Happened to me. Over time the TPS developed a dead spot. Put the climate control on auto and the input changes and no drop.
TPS = throttle position sensor
Right?
So it's something that can be replaced if I ever come up with the cash in the future? Or just something you live with?
I didn't mention it, but there's absolutely no power loss or anything....
MF
VimyJ wrote:Hamilton? Ah, yes... "Beers of the World". Still there?
TPS = Throttle position sensor.
Relatively cheap fix. Try a salvage yard. Good independent mechanic in Hamilton. First name is Audrey. Very professional.
Oh man....Beers of the World...you mean The Regal???? Jeez, I don't know how long it's been since you've been here, but we're talking prime dump bar.
For what it's worth, I think I have the best independent mechanic in Hamilton...name is Tony...runs a shop named Autogo in the east end.... licensed and certified Nissan mechanic...he REALLY knows his stuff.
MF
My car started doing the same thing a couple of days ago.
I hadn't noticed a connection to the engine fan, but I will check. (I'm usually at a stoplight in traffic when it happens, and I forget to check later.)
My climate control was already on "auto" though. What else can I try? (I've had the car a few months now, and I still haven't figured out the climate control. I'm feel like the car is smarter than I am!)
Thank heavens for this site!
I hadn't noticed a connection to the engine fan, but I will check. (I'm usually at a stoplight in traffic when it happens, and I forget to check later.)
My climate control was already on "auto" though. What else can I try? (I've had the car a few months now, and I still haven't figured out the climate control. I'm feel like the car is smarter than I am!)
Thank heavens for this site!
I been having similar problems, although its a little different for me. Sometimes when I start the car (especially in the cold) even with the Heat/AC off it will idle high, like at 2000. Then it starts to sound like a pro-stock race car, jumping up and down between 500 and 1500. Then after driving for a while it starts to act like it's going to die then jumps back up. In fact, it has actually died on me once at a stoplight, scared the **** out of me. Lastly, if I don't drive for a few days it won't even start. I was gone for a long weekend one time and when I got back i turned the key in the ignition and it was cranking, but then died. I had to keep giving it a little gas to keep it from dying.
Now, I have cleaned the throttle bodies with cleaner, put that injector cleaner crap in the fuel tank, and had my buddy look at it. If I replace this TPS thing, will it go away? I was thinking about having the injectors looked at, but I know nothing about the whole fuel delivery system. I know you guys know this car inside and out, any ideas?
Now, I have cleaned the throttle bodies with cleaner, put that injector cleaner crap in the fuel tank, and had my buddy look at it. If I replace this TPS thing, will it go away? I was thinking about having the injectors looked at, but I know nothing about the whole fuel delivery system. I know you guys know this car inside and out, any ideas?
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Jeff Williams
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2000 Infiniti I30t
2004 Infiniti M45
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OneFastJ30, I had a '93 Honda Accord, that did the "NASCAR" idle jump. It only did it when it was cold, and the choke was in operation. As soon as the car warmed up, it was fine. I never spent the time to find the problem.
DJMF, I would like to hear what the "fix" is myself. It sounds like a sensor, of somewhat.
DJMF, I would like to hear what the "fix" is myself. It sounds like a sensor, of somewhat.
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J-Owner
- Posts: 484
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- Car: 2010 FX35 owner and former owner of an '05 G35 Coupe and a '95 J30T.
Ok, I am going to put in my two cents and I am sure more knowledgable people will quickly silence me but the seems like it is going to die thing. Sounds like your idle speed might be set to low. I had a similar situation and that was all that was wrong with mine. They adjusted the idle speed thingy. (Don't make fun of my word).
As far as not starting after sitting a few days if it is cold and the car has been outside when you normally garage it it might be excess fuel (flooded) and when it does start it may sputter for a little while until the xcess fuel birns off.
I always garage my car but I had it outside one time when I was away and it was left to the cold for several days and I couldn't get it to start. It would try to crank but would never turn over.
Like I said that was my two cents. I am sure I will be quickly silenced by more experienced people but that is what happened in my case.
As far as not starting after sitting a few days if it is cold and the car has been outside when you normally garage it it might be excess fuel (flooded) and when it does start it may sputter for a little while until the xcess fuel birns off.
I always garage my car but I had it outside one time when I was away and it was left to the cold for several days and I couldn't get it to start. It would try to crank but would never turn over.
Like I said that was my two cents. I am sure I will be quickly silenced by more experienced people but that is what happened in my case.
My unscientific theory is that the idle isn't set high enough. So to compensate for this, the fan is tripping the idle higher...
I don't know...because that doesn't account for the times that it sits perfectly at 750 rpm.
Service records do show that the previous owner had the MAF changed a few years ago....
MF
I don't know...because that doesn't account for the times that it sits perfectly at 750 rpm.
Service records do show that the previous owner had the MAF changed a few years ago....
MF
VimyJ: Well mabey it's because I don't have the stock airbox? I put on a JWT Pop charger and I'm thinking mabey I messed the MAF up, is that possible? It sits right by the airbox right?
Jeff: I like the whole Nascar jump, good use of words. Mine does that only when its cold too.
J-owner: Actually, my car idles really high when I start the car sometimes, othertimes it idles really low, so I don't know if it is the idle thing (I know what your talking about, but I don't know the name for that thing either). You definately sound right about the car sitting in the cold, it makes perfect sense.
Jeff: I like the whole Nascar jump, good use of words. Mine does that only when its cold too.
J-owner: Actually, my car idles really high when I start the car sometimes, othertimes it idles really low, so I don't know if it is the idle thing (I know what your talking about, but I don't know the name for that thing either). You definately sound right about the car sitting in the cold, it makes perfect sense.
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cweberj30t
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- Car: 1993 J30t
2003 G35
2007 G35X
2011 G37X
OneFast, you should do a search on the site for air boxes, etc. You will find that those pop chargers do more harm than good. 1hp gain maybe at certain rpms vs loss from engine warmed air coupled with decreased engine life. The OEM set up is quite good.
MAF probably isn't the answer to these odd idles.
MAF probably isn't the answer to these odd idles.