Hi guys,

Very strange issue here.

'98 Primera P11
SR20VE
Powerland ECU, mapped for 98 but should be safe for 95

Yesterday I saw at my meter that I had to fill her up. I always use BP Ultimate RON98 but this time that wasn't around so my only choice was Shell V-Power 95. I only put half a tank in it.
All sorted and I went home. When I got home I parked the car and let it run a few seconds. Then the car started to idle very lumpy, like I had some wild cams. Going from like 750 to 350 up and down.

When I wanted to drive away again the car hesistated up to 3000 rpm. After 3000 rpm it took off like usual.

I immediately topped her off with BP Ultimate 98 and that seemed to work to a certain level. No worries while driving to a friend of mine. Going back, also no problems. But when I left for work this morning the lumpy idle and hesitation continued. On the freeway no problems. Engine cold or hot doesnt matter.
Today after work again I topped her off with BP Ultimate 98 without any direct result...

WTF can this be? Everything worked perfectly before I put V-Power 95 in it...

:( :( :(

fuel filter?

I'm going to check if my TPS is going bad. Does anyone knows if a TPS sensor from a DE will work?
Like this one?

http://img.auctiva.com/imgdata/1/0/9/8/3/3/3/webimg/229008674_tp.jpg

Your TPS has to match your throttle body. IIRC, there is one TPS for DE throttle bodies and another one for the VE throttle bodies. It's a physical mounting issue, so you should be able to easily tell the difference.

Ok, I will check

You are right, my TPS has 2 connectors.
By the looks of it this one should fit:

http://cgi.ebay.com/ebaymotors/THROTTLE-POSITION-SENSOR-Infiniti-I30-1999-99_W0QQcmdZViewItemQQhashZitem20afaa2ce8QQitemZ140 386118888QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAcces sories

Ok. Well, I will be going to check/clean the MAF sensor, measure my TPS sensor, clean the IACV and disconnect the battery terminal to clear any codes.

I once used Shell V power premium on my SR16VE JN15 Pulsar Vzr.Its rubbish!The cams wouldn't engage for about two weeks after all the fuel was well and truely gone.Its probably to do with the chemicals the Shell V power that supposedly clean your engine!I use Maxol E5 over here in Ireland with 5% bio ethanol,is supposed to be around 99 ron I believe and there is also E85 whichI think is around 103 ron fuel.
I would never use Shell V power in a VE car again!