FordyR31

I almost posted last night to check if the constant power to the ecu wasnt d/c when the engine was taken out.... Seemed too obvious tho.

Update, the GTSX pulled out 207rwkw at MRC on an R31 club dyno day.

A couple of things to maybe look for. If the wastegate is open just a tiny little bit, the turbo could still make boost but it may take a lot longer to build up... If the gate doesn't open at all from the 3mm e.g it is fused for whatever reason in that spot, could that cause the overboost as the turbine is copping a lot more vented exhaust gas than needed? Is the diaphram in the actuator still in tact or is it damaged? I had a damaged actuator on one turbo that was supposed to run 10psi and spiked up to 14. Maybe get ur hands on another actuator and test that? I have also heard of lesser quality high flow turbo's not being able to vent the exhaust gas through the wastegate (coz it's too small) enough even when it is working properly also causing overboost. Not entirely sure how correct that could be but I have heard. I have read when running higher boost through a high flowed stock turbo sometimes it doesnt hurt to enlarge the gate and flap over it. If u have an adjustable actuator rod, try adjusting that also to see if it makes any difference. Just a couple of things to try out, start at the cheapest and work ur way up lol.

Yep more importantly u easily cracked the hundred Ravi! Good shit. Was alright, shame more cars didnt show but meh, under 10kw off seeing a 400rwkw R31. f**k yeah. Shame it was running so rich. Steve when I get all my pics on photobucket i'll send ya the username and u can put up whatever ones u want on 31 club.

HR31 GTSX - RB25DET with 186rwkw 60 foot - 2.222 ET - 13.701 @ 104.5mph Gota get my 60 foot time down. You 31 boys should keep in touch i might be heading back out for a run in a few weeks time

Sick ULEH u got a front mount! Glad it came up good for u Brent.. U gonna get the polish onto it? I'll bring my camera round one day or we can meet up somewhere and take some nice pics of it.. Maybe at the creek if we end up going. If u make a members rides page anytime I got a few pics I can post for u to on my photobucket account.

What car were u in? I dont recall seeing any 34's..

Spotted a Purple R33 GTS-T today on Peanant Hills Road, had a cannon, FMIC. The lip and inside of the rims were blue aswell.. Any1 here? I was in the Black and Grey HR31 coupe.

Ok just to end this. The 1st issues that prevented the car from running were shagged fuel pump, shagged fuel pressure reg and blocked injectors. There were quite a few other problems also which may have contributed but now its back its running better than ever b4... Its going to WSID next wed if its not raining just to celabrate. Thanks to everyone who had suggestions and helped out. Liam

Just to add my pump was installed by Pro Maz in Melb and It was priming and flowing fine but was failing under pressure. Just because u can hear it and it flows ok in a flow test it doesnt mean it's holding pressure. Check everything in the fuel system u possibly can I'll link you to my thread, I went into a fair bit of detail of what happened and what was tried/suggested. Might be able to help u out a little. http://www.skylinesaustralia.com/forums/S2...Lo-t252361.html My car ended up having quite a few issues with it but the main problems that stopped it running were blocked injectors, fuel pump let go, hole in the diaphram in then fuel pressure regulator.

Mine was a bosch 040 from ebay, a ford dealer in melb actually but bought on ebay. I dont know exactly how to pressure test it coz I didnt do it but I would think maybe putting a Fuel pressure guage after the fuel pressure reg, or just b4 it after the fuel filter and priming the pump with the ignition on???? Please if thats wrong someone say so b4 he does it. New fuel pump, pressure reg and cleaned injectors and my car doesnt miss a beat on all 6 cylinders and goes a little better than ever.

I just had the exact same problem with my RB25DET and it ended up being a mix of shagged fuel pump not holding pressure and blocked injectors.... Pressure test ur pump 1st. It might flow ok but pressure test it to.U might find the electrodes on ur plugs have turned white from it running very lean under load. Also wouldnt hurt to check ur fuel pressure regulator to see if the diaphram hasnt broke.

Good luck with ur car. My car already has a GFB BOV and the problem is under load, not necessarily boost. Just cruising uphill will make it break down.... I'm not sure when the fuel pump is going to be replaced, hopefully tomorrow and will post if it fixes my problem or not.

My mate did tell me last night it wasn't holding pressure after he tested it. Im hoping this is the only problem tho. Been a bloody expensive fuel pump fix.

Im in western sydney. I'll try and pass this info onto the guy who is trying to fix it atm. I had narrowed it down to the front 2 cylinders at 1st but then when I tried to load it onto the trailer it ran perfectly fine without any load put on it. All 6 plugs came out with white tips after the 1st drive with my mate in the car. I'll pass this all on to my mate fixing it anyways, he does have all the necessary tools to test everything so i'll c how we go from there. He did do a pressure test on the fuel pump and it wasnt holding any pressure but flowing freely at the rate it should. We r going to start by replacing the fuel pump because of this and if it doesnt work I'll ask him to check the injectors like u suggested. Thanks for all your advice. Liam

As posted in my 1st epic is how it happened. I did unplug the coilpacks individually and the idle didnt change at all when 2 of the coilpacks were unplugged, the other 4 dropped the idle when unplugged... It actually sounded when it very 1st happened like it was down on a cylinder or 2, both on idle and any sort of revving. Now it seems to idle ok and rev ok under no load at all but put any sort of load into it and it will missfire and run really lean. Is it possible to have a fuel pump flow freely at its normal rate yet when any sort of back pressure is put on it from the fuel reg it will not push the fuel to make any pressure? Its becoming expensive to find even at mates rates.

Hey mate where r u located? if ur in sydney i am interested... Is it an ebay one? I bought genuine 040 a couple of years ago off ebay and it shagged itself...

Ok we r really stuck with this. It still isnt running right, the guy working on it has owned and worked on a lot of RB20's and 25's over the years and still cant work it out. The fuel pump has been tested for voltage and flow and is fine, compression was tested and was pretty high and very even across all 6. The fuel pressure regulator has been replaced. Coilpacks have been changed back to standard to check... ecu changed, afm and o2 sensors changed, all earths checked and made sure to be earthing properly. A few broken wires in the loom have been repaired, plugs changed yet again and gapped perfectly..... I dont know what else it could be. It is still running rediculously lean under any sort of load but can just be driven on a flat if u take it really easy, idles ok. Its worse in hot weather.... I dont know what else to list. Any1 have any ideas? Thanks Liam

spotted a white 32 GTR parking up at sefton playhouse last night..... any1 here?

The last z-tune was so smooth and aggressive... This one is a little bit ricey if it is to be the z-tune... I really like it as a GTR tho. Maybe something a little less drift spec tho... Im over that style of wheel to.

ok thanks for the info i'll mention it to my mate who is checking it all out and get him to do a flow test.

Is the 3-4L/min the same i should expect for a bosch 040 pump? Sorry out of all that shit i mentioned i still 4got stuff.... Do u know how much that pump should flow? Its about 2 or 3 years old.

All the spark plugs are the same when taken out, BP Ultimate fuel is the only fuel I use so no shit goes in or at least i try to keep it to as little as possible and the fuel filter is changed with the plugs and oil every 5000km. ALL 6 were white after the last run meaning all 6 cylindrs were lean. I did check the cooler piping and clamps and joins etc and all seem to be fine. We have had the car revving with the bonnet open and we cannot hear a leak as such. Also I would have thought that would make it run rich. If the afm has already accounted for the air and it isnt getting to the engine then wouldnt't it run rich?? As for the JJR coilpacks I have noticed the stock clips from the loom dont 'clip' on. They do come close but not quite. They have endured other hot days without a worry tho. I am trying to start cheap hence the change of plugs. But having said that the BKR6E plugs had been in for 2 months and were new when the coilpacks were new without a hassel but its cheap and worth trying. I dont know if my mates workshop at his place has a place we can test the fuel pump but then again I dont know how to do it. It starts on ignition and primes, runs fine on idle and off boost but obviously cant account for what its doing when the problem arises. I am obviously not ruling anything out until its been tested and proven to work fine but it was getting enough voltage at idle. BTW I'll edit this into my 1st post, the car is not blowing any smoke at any time but does smell a tad fuely.

Hey guys, Got another big long question for you, I'll try to give all the details I can to get the best answer. INTRO: I was driving my car last wednesday (really hot day) and I only had to go about 10km. Car had been driving perfectly fine for about 5 or 6, temp was half way on the guage. It has a stock S2 RB25DET with stock turbo from an R34 NEO25 on 10psi using an RB20 actuator so no extra control unit or tap controls the boost, a FMIC, run by a power fc and new 2 month old JJR coilpacks. I have always used NGK BKR6E plugs in the engine. This setup minus the coilpacks has been in my car for about 15 months without a hitch. WHAT HAPPENED: I took off relatively easy from a set of lights. The boost probably hit 3psi at maybe 3000ish rpm before i changed gears. Gave it a bit more in 3rd probably up to 7psi and all of a sudden it lost power and started to miss, it sounded just like an EJ20 with a big exhaust. I got it back to my mates place. On idle it sounded like an EJ but not wanting to stall, giving it little revs up to about 2500rpm it sounded like an EJ. I didnt rev it past that. WHAT WE DID: We left the car overnight to cool down and tried it again, same rough idle and revving. We unplugged each coilpack individually, the 1st 4 we unplugged starting at the firewall and working forward dropped the idle and the idle returned when plugged back in. The 2 coilpacks at the front did not change the idle at all. I called justjap and they told me to bring those 2 in for exchange under warranty. They did this no worries and handed me 2 new ones. I got home and changed them over along with brand new spark plugs. Same thing. The old spark plugs when taken out were a mix of a tan colour whish is supposed to be normal and a carbon build up, they were at this stage about 2-3000km old. We turned it off and left it. The next day I took the coilpack loom off and unwrapped the tape to check all the connections and to see if any of the wires were bent at sharp angles and it looked really good, felt around the wiring and couldn't feel anything out of the ordinary. No buildup or corrossion of any kind on any of the connections. Last night I plugged it all back up and started it to get it on the trailer to take to another mates house. Idled perfectly, revved perfectly, so it all sounded. I took it for a little drive up the road about 200m in total and turned around. Same happend as before at the lights, taking off easy in 1st and 2nd, no boost, drove beautifully. Gave it a little bit of poke in 3rd and as soon as boost came on it made a noise constantly until i backed off which i did very quickly as soon as I heard the noise.. The only way I came can describe the noise is like someone 'rolling an R' really quickly lol.. RRRRRRRRRRRR. This is a different noise to when i described it as an EJ20. After I backed off it went away and the car sounded normal again. all revs r fine off load, as soon as it hits into boost even in neutral it makes this noise and doesnt want to go anywhere. A mechanic mate looked at it today and I took him for a little drive, approx 100m all up after I warmed it up and it did exactly the same. He ruled out anything mechanical, going on how it idled and drove off boost. He took the plugs out and most of the flat part of the hook was white. He said that means its running lean. Tomorrow i'm going to put in some BCPR6ES (reccomended to use by someone who has proffessionally worked on skylines for years and owns 3) plugs to try and plug back in the standard ecu. The fuel pump is getting voltage and it seems the engine is getting the right fuel and spark off load. THE QUESTION: Has this happened to anyone else and what was wrong with your car? At the moment the things suggested are the power fc for some reason is running it really lean, the afm could be stuffed, wiring issue where the coilpacks or fuel pump aren't getting voltage under load. Could it also be a stuffed fuel pressure regulator? Any suggestions would be helpful so we know what else there is to try and what else has failed/broken in other peoples cars doing the same thing. Thanks in advance

......... no dice. Pimp myself and get 100% profit!