I have a 2K 5spd with 70K on her. I originally had 2 issues, 1 was that my car would always stall out when coming to a stop (this was fixed after cleaning the TB). The other one also happened when I slowed down to a stop. When I finally come to a stop and am taking her out of gear and into neutral the rpm's would race up to 3000 and just stay there. The SES came on and the code (forgot exact code) came up as an Idle Control Valve failure. Ok, no problem..I bought a new valve from Jerry Rome and had it installed Tuesday. Well on my way home from the shop it started up again. I thought that maybe an overnight ecu reset (d/c battery) was needed.

The next day I reconnected the battery and fired her up, she was idling fine. I drove to work (30 miles) with no problems. On my lunch break I drove for a full hour because I was loving the way she rode again (recently switched to AMsoil) and again, no issues. Well on my way home about 5 mins away she started to act up again. She still does the rev up to 3K but now she also sits @ 1500...rev up to 2000, drop to 1500...rev up to 2000, drop to 1500 and repeats this over and over and over again. The only way to stop this is to shut her down then restart. But even after restarting the issue comes back in 2 mins. This is especially annoying when I'm in traffic.

Does anyone know what this could possibly be? As of now the SES has not resurfaced. I've already spent $300 (part and install) on this problem and would like to avoid getting raped by the dealer.

Any input would be appreciated.

 

Cmon guys. I can't be the only one who's had this problem.

 

bump

 

I have had a simular problem with my max after I used seafoam in it. I used the seafoam earlier in the morning with no problems then when was sitting at a red light the rmps went up to 3000 and stayed there. It happened at the next light also soo i shut i down in a parking lot and started it again. It seemed to go away and then did it later that day. Now is been about two weeks with no problems. The only thing i could think of was something got dislodged from the seafoam and blocked an air line making it rev. Maybe try some seafoam to clean it out would help? let me know how you make out.

 

It could be something like that but the fact that the SES went on, was diagnosed as an Idle Controller Valve failure, the part was replaced...I thought everything would be fine. I'm still stumped about this. I'm taking her back to the mechanic that replaced the ICCV for me on Saturday. I was just hoping others have had similar issues with the ICCV and would be able to offer their advice. Thanks for your input though. You never know...it could be something like that.

 

I don't know about the rev'ing up problem, but I've been having problems recently with my car stalling when coming to a stop. What is involved with cleaning out the TB?

 

I'll post the link for you later when I get home.

 

Well I went back to the shop Monday the 17th to hopefully put this issue behind me once and for all. Even after the overnight ecu reset the SES came back on. It came back with a P0505 which is a Idle Controller Valve malfunction. He reset the ecu using th scanner, looked around a bit then pulled out the PCV valve. It was really dirty and did not click when you shook it. He asked me to replace it when I had the time.

He couldn't really figure out what else would be causing this issue so he asked me to drive around and see if it comes back. So I drive to the dealer and bought/replaced the PCV valve and drove some more. I keep driving and so far she's back to normal. 2 1/2 days and approx 150 miles later she's still running fine. In the past when I reset the ecu (by unplugging the battery) the problem would go away then reappear within 20-30 miles, especially when I hit traffic.

So it's 150 miles so far plus the really bad traffic that I hit the last 2 days and all is well.

I really don't know what fixed the problem. Is there a difference when the ecu is reset by unplugging the battery versus using the scanner? Can swapping the PCV be the answer? I really don't know but I'm crossing my fingers hoping my car is once and for all fixed.

 

hmmmmm that is interesting. Looking at the function of the PCV valve (basically a light spring loaded valve that opens due to pressure build-up in the crank case and re introduces the fumes into the incoming air stream to be reburned) and the fact that yours was stuck (probably closed) I wonder if the back pressure built up to a certain point (caused by the blocked PCV valve), and released into the intake manifold in bursts essentially raising the richness of the air/fuel ratio enough to cause the idle to surge like that?
Like I said Hmmmmmmmmm!!!

 

Well i had this problem. But this was because my car had flood damage. My car would go into fail safe. Idle at 1,500 and only rev up to 3,000. We diagnosed the problem to be the Idle Control Valve and EGR. So i take it to a friend of mine at Nissan, he hooks up the scanner and tells me the same thing. It doesnt seem correct. So we test out the connector to the Idle Control. Having 4 grounds and 2 power, this was odd. So i remove the ECU and try again. Ground at all 4 sides and center 2 no power. Seemed ok. So we put the ECU back and turn the car on, holding throttle so it wouldnt turn off. We test the connectors once again, grounded out 4 side. NOT POSSIBLE. The function of the plug is to send power to the idle control motor to move in or out. Well, we finally diagnosed it to be that the Idle Control Valve shorted out the computer and fried the engine idle circuits. So we go back to my friend at nissan and he hooks me up with a ECU, he flashes it and starts the car, everything worked great. So my friend hooks me up with this ECU for 150, the only thing it was from an auto maxima. But thats ok. Until i can find a 5spd ECU. I just suggest testing the connectors to the Idle Control, if everything checks out ok then it would have to be some other problem. Just get your hands on a wiring diagram and take it from there. Thats what i did.