So been having this slight hesitation upon accelerating. To me it seems like it does it right around 1200rpm. I was thinking a vacuum leak somewhere. I have changed every hose i can see. I checked the pressure with a gauge and it read like 17 . I changed 2 more hoses today that had cracks in them and it is now around 18. I havent driven it yet but i just wanted to know if these reading looks normal, i got a pic as well as a video. What do you guys get from these. Mind you im not sure how accurate this gauge is, it is a bit older.




http://www.youtube.com/watch?v=gKCgp...ature=youtu.be

 

Which engine do you have?

 

Its a GXE. The vg30e.

 

same here also having problems with mine at the moment... RPM jumping and cant find the cause... hopefully we have something that's the same let trying killing two birds with one brick...

 

Yes, mine idles perfectly normal though and there is no shaking or anything. The only symptom in the hesitation when accelerating. Im gonna drive it today, i haven't driven it since i changed those last two hoses so maybe just maybe its fixxed..ill report back soon.

 

Ok so drove it a bit today and it seems to be driving fine now, Came to about 6 stops and it didnt hesitate so fingers crossed its fixxed. btw i changed these 2 hoses.

 

The one on the left side in your picture/in my car it is cracked a little bit where did you get a replacement?

 

The smaller one? I just got them at a local parts store. Just regular vacuum hoses, i took them in to get the exact size. The bigger one i have circled, i just used a regular straight hose, as long as it doesnt pinch it will be good. Some of the hoses i replaced like the one in the picture directly on top of the oil dip stick and the long one that goes to the brake booster i got those at a junk yard since im not gonna pay $40 for a little piece of hose from courtesy, lol.

 

I'm having trouble with my vg30e as well. When the engine is cold and at idle I get a miss, more extreme in colder temperatures. My nissan dealer suggested that sometimes the injector rings can start to leak causing a misfire when fuel enters the combustion chamber at the wrong timing. I've recently noticed that when I first start the car after its been sitting for about 8 hours after work that it hesitates upon initial acceleration in drive; it only does this after an initial short trip followed by sitting for 8 hours. I live close to my work so in the morning I only drive about 4 miles to work and then park for 8 hours. Wondering if this is now a transmission slip or if its related to my engine misfire? Anyone have any insight? Thanks for reading

 

Check spark/fuel/air and report ur findings. Can be as simple as wires or cap/rotor even if these parts seem okay.

 

Couldn't hurt to replace the upper and lower intake gaskets, not to big a job. I was having a similar issue like some of you guys have been describing, and after changing those out and checking vac hoses I haven't had any problems since.