R32 Gtr Running Out Off Puff At 4000Rpm

[joshua shirvington]

hi guys,

im only new to the forums. ive just purchesed a R32 gtr 1990 model. after owning a supra.

now after 3 days off ownership i've ran in to issues with the car. i was driving it stopped at some traffic lights and turned. when turned i decided to give it a lttle boot full and it just cut out and shut down. now i restarted the car and after that the car wont rev past 4500rpm.it splutters and feels like its surging. i orginally thought it was the fuel pump (checked pressures and flow rate, a little slack) and so happen i had a denso 10-20 universal fuel pump so i placed this in it did not fix the issue ( though finding the original fuel pump was a little tired was a good time to upgrade) now i then i was thinking the air flow meters so i've pulled them off and given them a good clean out ( i have spare airflow meters so i fitted those also didnt fix the issue). now this did not fix the issue either! i also check vaccum hoses and other relating hoses ,found no leaks. just wondering if you guys no any issues with the gtr relating to these faults!?

does the tps (sensor) have a spring load in it? or is it one off those ones that dont? thats what im thinking the issue is at the moment just sourcing a new tps now?

your info and input would be great

thanks Josh

[joshua shirvington]

it just seems like its forgotten what boost is! its just cutting out at 4000rpm. more underload though through higher gears the issue happens lower in the revs!

its runnning a kaikimoto ecu i was told. just havent pulled the trim off too check!

[Moodles2]

Get a stock ECU in there, who knows what that modified ECU is doing... and if it was even tuned for that car or just brought off ebay and whacked in there.

[Duncan]

does the car idle OK, or is there lots of black smoke.

9 times out of 10 this sort of problem is caused by a major boost leak. Unfortunately the other time out of 10 it is caused by loosing the compressor wheel off your turbo

Do you know what the maximum boost it hit was?

[MrStabby]

does the car idle OK, or is there lots of black smoke.

9 times out of 10 this sort of problem is caused by a major boost leak. Unfortunately the other time out of 10 it is caused by loosing the compressor wheel off your turbo

+1, so check if any of the intercooler pipes have popped off (boost leak), or disconnect the front pipe from the cat and look for this;

That's the remains of a ceramic turbine...

[joshua shirvington]

Well no intercooler pipes are off! And the car has r34 GTR n1 turbos on it! But I'll pull the exhaust off and check the turbo's and let you's know.

Also the idle is a little ruff and dies blow a little bit off black smoke on start up but it ran perfect all the way home from Sydney and didn't miss a beat

[joshua shirvington]

Boost not sure but I was told it's running stock boost! And the car was apparently tuned with that ecu! The car still boosts cause you can here it and it start to pull the littlest amount the surges an splutters!

Edited July 21, 2011 by joshua shirvington

[MrStabby]

Ok since its still boosts, its definitely not blown turbo.

Is there was black smoke when it splutters?

[joshua shirvington]

No black smoke when it splutters just surges!

[10 4]

My car did this.

Stock injectors FTL.

Sard 700s and tune =

[joshua shirvington]

Mmm! Cars, hey!! Expensive passion! Lol

[GODZILLA-GTR]

Mmm! Cars, hey!! Expensive passion! Lol

welcome to the wonderful world of owning a GTR haha

[iplen]

Doesn't sound quite right.. But seeing as no-one has gone with the good old coils options, I will. Open the bonnet and take the coil cover off, see if there are sparks coming off the coils onto the cam covers. Maybe swap AFMs, cleaning them is not a great idea.

[10 4]

I wasn't saying it will be the same problem, just what mine was doing and what it turned out to be - injectors maxing out and ecu playing games. Boost, cut, boost, cut all the way once 3.5k+. It would still rev but stop go stop go..

[joshua shirvington]

Meh that's alright I'm happy to play around with it just want to be boosting again!! no coils are only new spitfire ones so not that and no sparking And plugs good and afm's changed over not them either! I'm thinking the tps sensor since it's a weird one it has points in it and when you play with the turn wheel inside it's just all free play! You can't here them clinking over or anything! And just out off sheer luck it's still drivable! And I'm leaning more to that cause it running rich down low and lean up high!! It's just not getting fuel!

[DVS JEZ]

Theres 2 turbo's so if one is popped then the other can still be boosting slightly.

Drop the cat from the front pipe and check. Take u 10 mins to check.

[joshua shirvington]

U will this arvo

[MrStabby]

Theres 2 turbo's so if one is popped then the other can still be boosting slightly.

Nope - it cant happen. The broken turbo is basically a hole to atmosphere, so its like having a cooler pipe off.

[iplen]

Nope - it cant happen. The broken turbo is basically a hole to atmosphere, so its like having a cooler pipe off.

Can vouch for that.... Seemed to run ok, no missing etc, just only had about 100hp. Electrical is where my money is...

[joshua shirvington]

i'm thinking electrical as well now! pretty much ruled out everything else! just have too look into it a bit more! so ill get the osilloscope out at work on monday and check the ignition module, tps and several other things!! hopefully i find the problem!!!!