I went to take in my car for its 3750 oil change and asked to have the idle acceleration jump TSB performed on it this past Saturday. Advisor called later in the afternoon stating that the VVEL Module has an issue with the new software and Infiniti has an updated version of the VVEL Module. It's going to take up to Friday to get the module in...Has anyone else run across or heard of this problem? Vanos' going bad in my 325 was a common occurrance...hopefully will not be in our G37's..My G37 is a November 2007 build btw..

 

Can you elaborate a bit more on your problem... I've noticed something with mine where when I start it and leave almost immediately after cranking, when I give it gas it is jumpy (almost as if you are quickly giving it gas, letting off, giving it gas, letting off, etc.) Is this what you are experiencing?

I haven't yet taken it in, but need to. I normally only get the problem when it is cold and since it warming up here in ATL, I don't see it happening as frequently.

 

Is your car an automatic?

 

Who are you asking... If me, yes. I have an auto.

 

This is a very common problem with AT's.. I'll contact my dealer tomorrow and try and see if this is something that we all (5at owners) should look into having done.

 

Well thats the thing...as far as I know, I had no problem with the VVEL....The problem I had was the throttle would engage at low rpms (less then 1000) randomly. Most of the time happened in trickly locations...ex: pulling into a parking spot, having my foot on the brake only, the car would lunge forward like someone pushed my accelerator down...TSB supposedly fixes the problem with new software. I get a call after the new software was installed saying that the check engine light was on due to VVEL problems and that it would need a new module. He said that they have had this problem with a large number of cars they performed the TSB on...Maybe the new software has different diagnostics for the VVEL? I'm going to call my advisor tommorow for a better explaination. At least they gave me a new 08 G35 as a loaner...I miss my car...Its a G37 Base btw...auto

 

I have this problem...in fact, as an experiment, I made it all the way out from the 6th floor of my parking garage yesterday by putting it in drive without pressing the gas! They are going to reset mine later this week. It's really noticable in stop and go traffic, which we have a whole lot of here in Houston.

 

....Reason #237 not to buy an automatic....

 

well even with manual on a cold start i dont need to gas the car in order to go from a standstill. its like my car turns into an automatic for the first couple minutes haha.

 

Ok just got off the phone with my advisor...When they installed the new ECM software for the TSB (which was supposed to fix my idle jump problem) it caused the on board diagnostics to show a problem with the VVEL module. The current VVEL module in my car is incompatible with the new software they installed. So it's stuck in limp mode (can't rev above 2000 RPM). Nissan has an update VVEL module to solve this problem...I told him I have friends who have the same problem...he said to hold off a couple of weeks to have the TSB performed until they have more of the new VVEL modules in the country..He said currently a pretty big back log of people waiting on this part..The surprising part is that I haven't seen a single other person on this board having the same issue....Very strange......

 

Too late!!

 

That happens because the engine is running at a higher than normal idle RPM. Next time you leave immediately after starting up your car on a cold start, do this... Take off and get up to about 30mph, then put it in neutral....the RPM's will stay up at around 1.5-2K even though the car is in neutral.... magic

 

It's called "open loop" mode for the ECU. This is not a problem. When starting from a cold start, the engine will run around 1500 or higher rpm to quickly warm the engine coolant and oil to operating temp. If you drive your car in open loop, it will seem kinda jumpy or overly sensitive on the throttle. This is because the the car is making more power due the air fuel being allowed to run higher than 14.7 or "lean". Once the oil and coolant temps reach operating level, the idle will return to 700-800 rpm and the ECU will try to keep the AFR at 14.7. A long story short...don't drive your car in open loop.

 

I had the TSB for the surging forward, performed on my G37 in February. They had it their for a week, due to the "dealer's computer not communicating with my car's computer." That's how they put it to me. After a week at the dealer, the reprogramming went through.

Since then, my car has not surged, even in cold, hot weather, or if I don't let the car warm up.

NICE!

 

I have yet to see my car idle under 1000 RPM warm or cold. I've been paying attention.