Need Help Asap Driving Me Insane...

[RBJ37]

Ok so recently just bought an r33 s1 and when I picked it up realized it wasn't running right at all wasn't even making 3psi of boost so anyway on inspection when I get home started to find pop the bonnet and find an absolute mess of what these ppl had done to it (obviously had no idea what they were doing).

Ok now first of all I have the car running as best as I could get it so far after all these things I changed which included.

A series 2 throttle body and tps while still retaining a s1 loom, harness plugs weren't changed or anything just jammed in too try and fit, so replaced those and set tps back to 0.45-0.55v

Oil/air seperator was running from tapper cover PVC side to catch and right side was blocked 1 part and the other running to catch without a breather so I put a breather so the motor could actually release crank case pressure.

Knock sensor the back 1. Wire was cut in half so re wired it and seemed to be fine....

Also the thick hose that runs from your air regulator I think to your standard cross over pipe was plumbed in after the air flow meter but in front of the turbo lol so put it back to were it should go back up the top on the cooler pipe.

Also airflow meter was f**ked and oil was all sitting in the front pipe and mesh had been taken out of it so replaced it with a good second hand 1..

Now after I had done all this car is running a hundred times better but I still have 1 problem car will not go past 5k rpm it just seems to hit like a limiter and won't go past it,

Now I've also replaced Coil packs bought from a mate they seemed to be in very good condition closely inspected each 1 to make sure there wasn't any cracks, as to find out the old 1's were full siliconed up. Any problem still there.

So pretty much I have gone through everything I can think of to try fix this Inc.

Checked all sensors

Replaced parts mentioned

Run diagnostics my self (34 knock sensor) still remains

But it's weird cause system ses it's fine then I'll check again and still comes up??

Checked ignition timing

Reset tps like a 100 times

Checked all wiring and made sure all pinouts are right on ecu.

And yer think that's about it probs a few other things I've checked as well but forgotten seriously any help or ideas would be excellent cause it's really doing my head in

Mods are

3" zorst

Are cooler kit

10psi boost

Think that's about it.

Also boost sensor solenoid has been taken out and wire has been ground.

If all else fails was thinking about buying consult cable

And DL ecu talk and see if I can find the problem that way but please somebody help me lol

Thanks guys (RBJ37) Richard

[800KD]

Hey mate it sounds like to me the timing belt is out one tooth. I have had this problem before when i replaced the timing belt. It would also drive fine untill 5000 rpm then stop reving. Took me a while to work it out but it was advanced one tooth.

Worth a look!!

[The Dan]

Sounds to me like the factory ECU cut for airflow. Yes it is normally at 12.5 psi boost but we have usually fixed this same problem by installing a nistune

[RBJ37]

Hey mate it sounds like to me the timing belt is out one tooth. I have had this problem before when i replaced the timing belt. It would also drive fine untill 5000 rpm then stop reving. Took me a while to work it out but it was advanced one tooth.

Worth a look!!

Yer I I did actually think it coulda been out a tooth

Lol f**k seriously have never done twin cams before lol I've always built 30et's lol so this could be interesting

So I'm guessing I gotta get motor back to TDC and what do I new to pull crank angle sensor out? Do u count valleys and hills to go on a certain way like rb30's ??

Gahhh bloody twin cams lol thanks for the input mate guess I'll check it out see how I go?

[RBJ37]

Sounds to me like the factory ECU cut for airflow. Yes it is normally at 12.5 psi boost but we have usually fixed this same problem by installing a nistune

But if it's only running 10psi why would the ecu be cutting airflow at 10psi and not 12.5? And yer mate nistune is next on the cards mate was gonna get a consult cable and ecu talk to find this problem, if I can't then off too efi to get a nistune and z32 airflow meter...

[800KD]

Yes you need to pull the timing covers off and count the number of teeth between camshafts and crankshaft gear. I don't know the numbers off the top of my head? Do you have a workshop manual?

If not, pm me and i will dig out my manual and try help u out!

[The Dan]

But if it's only running 10psi why would the ecu be cutting airflow at 10psi and not 12.5? And yer mate nistune is next on the cards mate was gonna get a consult cable and ecu talk to find this problem, if I can't then off too efi to get a nistune and z32 airflow meter...

Yes I know it doesn't make sense but it is a factory flaw in the ECU cut. I have no idea why it does it. Sean explained it to me when I had the first one. I didn't want to put in a Nistune JUST to test the problem but after we had checked every single other problem, that was found to be the cause. Have had one more like it. 5k and it hits a massive wall. You can be at 5% throttle and it won't do it, bt open it up and let boost come in and it will go every time. Also if you keep the foot buried, it will keep increasing where the cut is before it can stop it.

Check the timing as suggested, because if it's hitting knock safety map then it could do the same. If you're not sure on how to check the timing. Bring it down to me or EFI and either one of us can have a look for you. It only takes a very short while to rip that top cover off and do a TDC mark check.

I also have a Consult cable you are welcome to borrow but it may be difficult if you do not have a legal version of the software. I also have a laptop with the appropriate software installed but lending that out is not really something I am keen to do

[jiffo]

Or you can line the dots on each camwheel with their corresponding timing marks on the back cover.

Balancer, first mark at TDC.

Yes you need to pull the timing covers off and count the number of teeth between camshafts and crankshaft gear. I don't know the numbers off the top of my head? Do you have a workshop manual?

If not, pm me and i will dig out my manual and try help u out!

[RBJ37]

Yes you need to pull the timing covers off and count the number of teeth between camshafts and crankshaft gear. I don't know the numbers off the top of my head? Do you have a workshop manual?

If not, pm me and i will dig out my manual and try help u out!

Cheers man don't have a manual but I do have access to one online so its all good

[RBJ37]

Yes I know it doesn't make sense but it is a factory flaw in the ECU cut. I have no idea why it does it. Sean explained it to me when I had the first one. I didn't want to put in a Nistune JUST to test the problem but after we had checked every single other problem, that was found to be the cause. Have had one more like it. 5k and it hits a massive wall. You can be at 5% throttle and it won't do it, bt open it up and let boost come in and it will go every time. Also if you keep the foot buried, it will keep increasing where the cut is before it can stop it.

Check the timing as suggested, because if it's hitting knock safety map then it could do the same. If you're not sure on how to check the timing. Bring it down to me or EFI and either one of us can have a look for you. It only takes a very short while to rip that top cover off and do a TDC mark check.

I also have a Consult cable you are welcome to borrow but it may be difficult if you do not have a legal version of the software. I also have a laptop with the appropriate software installed but lending that out is not really something I am keen to do

Cool cool awesome man so where bouts are you located? Wouldn't mind bringing it down fir someone to have a look I can't check timing atm either cause my timing light shit it self the other day, thanks so much for the offer but I wouldn't like to be responsible for borrowing your stuff haha if you wouldn't mind if I brang it down and can't find the problem do u think u could do a consult check and such rather then borrow your gear?

Thank you so much appreciate it Mate

[RBJ37]

And elite I'm free pretty much all day today so if you wouldn't mind having a look bro that would be muchly appreciated aye

[The Dan]

Flat out all this week sorry mate. I'm across the other side of the yatala drive in from where EFI is.

[RBJ37]

Yup yup no worrys budd well I had a bit of a fiddle Round today and wound the boost controller right down and it went past 5k so thinking coil packs or yer like u sed the air flow cut in the ecu, still don't get it but feels like it has half the power it should so maybe it has skipped a tooth ahhh thing gives me a head ache lol, if I still can't figure this thing out by then I'll drop down next week when u have a few minutes bro cheers bud

[RBJ37]

Hmm well after bit of a drive today that the boost wasn't the problems nor do I think it was the coil packs, I decided to pull the cam covers off and put motor back to BTDC and yer pretty sure it's out like 180'C cause neither of the cam pulley marks lined up and I made sure balancer mark was at 0'c on crank cover so yer guess I'll have to put it back so now the only problem I'm running into is when I turn the cam pulleys they don't turn far enough to line up with the markings on the pulleys so what do I do? Obviously they gotta be at the right spot other wise valve timing and everything would be out correct? Any help would be awesome thanks guys hopefully will get this thing going good eventually lol

[RBJ37]

Whoops lol 180 degrees not 180'c big day haha

[Smity42]

Remember the crank turns twice for every one revolution of the cams... so you might need to spin the crank around once more to the TDC mark and then see how the cam pulleys line up.

[The Dan]

Hmm well after bit of a drive today that the boost wasn't the problems nor do I think it was the coil packs, I decided to pull the cam covers off and put motor back to BTDC and yer pretty sure it's out like 180'C cause neither of the cam pulley marks lined up and I made sure balancer mark was at 0'c on crank cover so yer guess I'll have to put it back so now the only problem I'm running into is when I turn the cam pulleys they don't turn far enough to line up with the markings on the pulleys so what do I do? Obviously they gotta be at the right spot other wise valve timing and everything would be out correct? Any help would be awesome thanks guys hopefully will get this thing going good eventually lol

Please take your car to someone who knows what they are doing. Yes it's a learning curve, yes it's very expensive if you stuff it up. I do not have time to do anything as I'm far too busy. I just hate seeing people attempt complex operations on their own, only to be bitten twice as hard due to their lack of experience

[RBJ37]

Yer well mate I did it myself and she is sweet as now, and yes I know it's two rotations for it to come back up put it back to TDC cams were a fair bit out each way so turned em back to timing marks put belt back on an turned crank by hand to make sure it didn't get court up on something, and yer elite I don't have much experience with twin cams but have built a few 30ets so it's not like i don't have the knowledge there already, was just a little unsure about how the cams line up a I'm use to doing single cam, but thanks everybody for the input she runs mint now can actually get some timing when I turn the cas, I really shoul have more experience with these as I do have a fully built twin cam in my Vlt but I got the motor built and haven't had to touch it yet it's only done 35 thou k's so guess I'll get more with these twin cams as I go along and as I use this as my daily now, but yer she pulls hard right till limiter now without a drama goes hard, thanks elite for the input

Now I'm going for a boost yehya

[800KD]

glad you got it sorted mate!!!

[The Dan]

Yer well mate I did it myself and she is sweet as now, and yes I know it's two rotations for it to come back up put it back to TDC cams were a fair bit out each way so turned em back to timing marks put belt back on an turned crank by hand to make sure it didn't get court up on something, and yer elite I don't have much experience with twin cams but have built a few 30ets so it's not like i don't have the knowledge there already, was just a little unsure about how the cams line up a I'm use to doing single cam, but thanks everybody for the input she runs mint now can actually get some timing when I turn the cas, I really shoul have more experience with these as I do have a fully built twin cam in my Vlt but I got the motor built and haven't had to touch it yet it's only done 35 thou k's so guess I'll get more with these twin cams as I go along and as I use this as my daily now, but yer she pulls hard right till limiter now without a drama goes hard, thanks elite for the input

Now I'm going for a boost yehya

Haha glad you sorted it. I was a little worried by your last post and that you may end up breaking your engine