RB25DET cranks but won't fire!!

[ice180]

Hi guys and gals just got a nice R33 GTS-T in today with some nice mods.. Picked it up from the import yard, got 100 metres down the road, stalled it pulling out onto a main road - damm that twin plate clutch, and couldn't get it to start again. It woudl crank over slowly trying to catch felt like it was flooded... Then then battery died, so we tried jump starting it but still no go... Now it seem to crank over reallly fast with no sign of firing. Even put more fuel in... Also still a slight smell of fuel... Can hear fuel pump come on as well so its not that. It also has a remote start and factory remote immobiliser. Other weird thing is that the ignition stays on for about 20 sec with all the warning lights on the dash for about 20 sec after you take the key out... Can't find a turbo timer anywhere....

I am thinking it could be the immobiliser but not sure... Will try today to take the cover off pull a spark plug out and see if any spark.. Will also maybe take the cam cover off to check the timing belt and then check all fuses as well. Any other hints?? Sorry its an RB25DET engine.. Someone also said take the oil cap off and see if you can see the camshaft turning?

I had this problem in a Soarer once turns out it was the igniter module and two fuses.... but the Nissan has the amplifier on the back of the engine....

[ex-static]

Yea only thing I can think of is fuses or sensors..

similar thing happened on my VL (RB30det) and it was either the Fuel Pump fuse, or the CAS ( I dont think the rb25s have a CAS though)

But it does sound like some weird ignition thing.. has it got an ITC or anything? Did it start ok when you first started it?

[nissaner]

Originally posted by ice180

Other weird thing is that the ignition stays on for about 20 sec with all the warning lights on the dash for about 20 sec after you take the key out...  Can't find a turbo timer anywhere....  

the turbo timer might be the one like i had which was built in with the alarm system...

[ice180]

plugs were fouled... its what I thought... its animal now!!!! they are a bitch to change on a GTS-T tho

[Guest]

that is true, you have to take off the cover (nightmare)

[ice180]

yep GTR's, Soarers and !80's so easy..

[Guest]

what mods are on this 33

[ice180]

where do I start>???

hks 2530 turbo

apexi fuel reg

Nismo 550cc injectors

HKS front mount cooler

greddy profec b boost controller

front and rear strut braces

trac control and active LSD

four greddy electronic gauges

Nismo 300kmh dash

Tein suspension

Chipped ECU

300zx AFM

remote start and timer

Nismo twin plate clutch..

some poofy cushions as well as 3 layers of mats in the passenger side.

[Guest]

very nice

[Bozz]

I had mine do that as well, when I started it, I stalled it almost immediately and then it started cranking but not a single sign of life - it was cranking very fast, not like when its starting up, it was cranking as if all spark plugs were removed and there was no compression.

I ended up tearing my hair out until I unplugged the variable cam timing solenoid then it started cranking normally and fired after a few coughs and splutters, then I plugged the solenoid back in and all was well.

[S13 Silvia]

I've been cranking my rb20 over the past few days trying to work out why it isn't receiving spark. This means that there would be fuel entering the cylinder's but not getting fired. Over repeated attempts to start it, could this non-burnt fuel build up in the spark plug gap so that by the time I find the problem, it wouldn't fire anyway coz of the build up of fuel? Or would the build up in the gap be minimal if at all?

[SLY33]

Originally posted by ice180

  It woudl crank over slowly trying to catch felt like it was flooded...  

I had this exact problem. Really pissed me off! had a petrol smell and it seemed the engine was pumping fuel thru even though it wouldnt start. What it turned out to be was a vacuum hose came off this thing here (in the picture attached) dunno what it is, but plugged it on and it went perfect straight away.

[Bozz]

Sly33 what that yellow arrow points to is the air bleed tap for your cooling system, its not an air hose but a water hose.

[SLY33]

Originally posted by Bozz

Sly33 what that yellow arrow points to is the air bleed tap for your cooling system, its not an air hose but a water hose.

Oops, thanks for pointing that out! Im in sydney and my car is in adelaide- i guess i cant remember the hose! when i get back ill check which one it really was :D

[Doctor]

I thought it was the fuel pressure regulator hose?

Doc