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Hey guys i have an issue on my r34 skyline with the Rb25de engine. The car has done 94XXX on the clock and its showing the engine light code "21.ignition signal primary". the weird thing about it its that the car runs absolutley normal and it starts normal, i revved up to 5000+rpm and theres no signs of misfire or anything weird. The only thing i remember is that i was travelling at around 60kmph and i pulled the handbrake when i looked into the dash board the engine light appeared. But i dont think thats the issue.... ive been driving it around and probably travelled 300ks with the engine light on. anyone expereinced this problem here? please i need some help and advice. Could it be the following: - Ignition coil and coilpacks are failing? are ignition coil and coilpacks the same thing? - The crank angle sensor? - due to a timing belt and waterpump service? - spark plugs? any advice and help would be great thanks!!

Brace yourselves for it is, a long read..... I was driving along on Sunday when out of the blue the Engine light came on and the revs dropped to idle (Like I was in Neutral) a few seconds later the revs came back and the engine light went away. I pulled over turned the engine off and checked the engine bay for anything but couldn't see/smell/hear anything out of the ordinary. I started the car up fine, drove for another 20-30ft and lost everything had no power what so ever and had oil,engine and some other light come up.I tried starting it back up but it wouldn't start. I ended up getting towed to my local mechanic. They checked it out on Monday and low and behold it started first time, they took it for a drive still fine but when they went to move the car again it died on them, they checked for error codes and apparently they got some kind of Immobiliser code error. Basically the car thinks there is no key and cuts of fuel/power to engine? The mechanic is not to sure what's going on and said perhaps the aftermarket immobiliser is interfering with the stock immobiliser. He suggested to drive around without the aftermarket immobiliser fob near the keyring (that's where the aftermarket receiver is placed) and see if the engine still cuts out and try my spare key. Well I picked the car up yesterday, it started up fine ( I used my spare key as well), about 10 minutes later, I'm about to go up a fairly steep hill, I put the car into manual mode so it goes down to 4th gear (to get higher revs for the hill) and then about 5 seconds later the engine light comes on and revs drop to idle. Fortunately that went away after a few seconds so I managed to get up the hill. The whole way home, every now and then the car would feel like it was misfiring/choking and it felt like it would go back to neutral/engine light at any stage but it didn't. I'm really confused as to what's going on here, the only thing I can think of is I gave the engine bay a bit of a clean on Saturday and perhaps I have moved something? This has never happened before with the car and I've never had any problems with the car either. Any help would be GREAT!!!