Hey people I was messing around with the car new TPS, adjustment, and some fresh fluids. Its finally good enough outside its the first time I push my freshly swapped 87 1JZ. At a low pull,about 4K she rides like a dream, lots of cruising power with the 4.30 gears. Around mid afternoon I went out for a allout run, my car nearly broke my chin. Its after full boost around 5K rpm the car feels like I hit an invisible car, severe and sudden loss of power. I haven't had any codes pop up but I think its turbo related my first step is checking the wastegate any help or expirience is appreciated thank you
hard stalls at 5K?
- Thread starter NYsBlueMA
- Start date
Did you pull codes since this happened or are you just saying the check engine light hasn't come on? You might have codes but no CEL. Sounds a lot like fuel cut (code 34)...
sorry i took so long out to delaware with the family I have no codes and I ran them twice. I read in most manuals a code wont set unless consecutive failures occur I have not 1 code. One of my fellow track buddy's who's worked on alot of turbo cars told me its boost cut that usually happens with a bad wastegate. I haven't had the chance to check her out due to rain but are there any vacuum lines that go to or come off the turbos themselves? If its the wastegate/s do I have to put in a new set?
My thoughts: You hit boost cut.
To semi-confirm: What exhaust set up have you got? Do you have a boost gauge fitted? If so, what boost did it make just before the cut?
It sounds _exactly_ how the 1JZ boost cut feels...
To semi-confirm: What exhaust set up have you got? Do you have a boost gauge fitted? If so, what boost did it make just before the cut?
It sounds _exactly_ how the 1JZ boost cut feels...
Okay heres my info its a 1987 lsd package no creature features 1JZ swap R154 tranny running of the downpipe with the JZ Tach no big mods. 2 3/4 piping 3 inch intake and a X-line boost guage reading 20 lbs vacuum at idle 11 lbs about 3500 rpm. FIL I think it is boost cut but would exhaust really cause it, I dont see creep on the gauge or codes but i didnt do anything but regular driving since that happened. My friend said the ECU would catch a creep before the gauge so I only see 11 lbs
I dont have the guage to check the actual turbo but my gauge stays at 11 psi only thing I could think of is the tach gauge its a 1JZ 7k limit could it just be too much/little resistance somewhere? im running injector cleaner by lucas right now mabye a corroded injector im bringing it by my friends shop hes got tons of tools less of a clue lol