Author |
Message |
Jacob Thomas
Tinkerer SA VVTi Turbo
Posts: 36 Reg: 01-2010
| I have recently found the car to be significantly more thirsty than before, 430ish k's from 69L whilst driving like a grandma 80% of the time and barely going over 4000RPM the other 20%. I took it to get dynoed and it only came back with only 129rwkw with a suspect blocked cat. I replaced the front exhaust, 3" from the turbo all the way to the Y where is splits into 2. Problem still not fixed. Other things i've tried, cleaning the afm, resetting the ECU and i also ran diagnostics with nothing coming back. Where too next?
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Matt Sartori
DieHard Western Australia Rx7
Posts: 679 Reg: 08-2008
| Stuffed 02 sensor? |
Jacob Thomas
Tinkerer SA VVTi Turbo
Posts: 37 Reg: 01-2010
| i believe it had a new one put in at the 100k service |
Vinh Bui
Goo Roo NSW 96 JZZ30 (TT)
Posts: 3082 Reg: 07-2005
| Could be the AFM itself? I remember my Prado had the exact same symptoms above due to a faulty AFM. |
Narvey Vilaythong
TryHard SA soarer tt and 3T-GTE corona liftback
Posts: 171 Reg: 09-2009
| 1J's don;t have an AMF. Maby ECU or FPR |
James Cahir
TryHard ACT Soarer TT
Posts: 392 Reg: 04-2008
| The VVTi one's have an AFM. |
Michael Larcombe
TryHard TAS Soarer GT - T
Posts: 103 Reg: 08-2009
| Note Jacob has a VVT-i... Earlier 1JZs run a map sensor. With the VVT-i they reverted back to an airflow meter. Most probably what is wrong here mate, my friends 32' GT-R had exactly the same problem, around the same power output and rubbish fuel consumption. Replaced them with freshies, and no problem. I had the same problem also with my previous SW20 MR2 (3S-GTE)... Are you running a wet-type pod or panel? If so then the hotwire in the AFM is probably covered in filter oil, causing it to malfunction. |
Jacob Thomas
Tinkerer SA VVTi Turbo
Posts: 38 Reg: 01-2010
| sorry what did he replace? I'm running the stock air filter and cleaning the afm with carby cleaner was the first thing i did. |
Jacob Thomas
Tinkerer SA VVTi Turbo
Posts: 39 Reg: 01-2010
| also could it be the water temp sensor? it seems to run much better when cold. As the car warms up it feels less responsive and also develops a strange vibration between 2000 and 3000 RPM when under mild acceleration Jacob |
Vinh Bui
Goo Roo NSW 96 JZZ30 (TT)
Posts: 3084 Reg: 07-2005
| Try replacing the AFM - would be the first thing I'd do. Maybe someone super awesome on here can help Jacob out and lend him theirs to test? Otherwise bite the bullet and contact Castle Hill Toyota for a price on a replacement part. They're pretty good with import cars, and they deliver stuff pretty quickly. Mention Soarer Central and you might even get a discount! |
Walter Gillmore
DieHard QLD TT JZZ30
Posts: 718 Reg: 07-2009
| hows the boost? is it building up as it should? vvti's run sequential dont they?? |
Scott Wilkes
Goo Roo Tasmania 92 TT Factory Manual, 70 HG GTS Monaro
Posts: 1575 Reg: 10-2008
| they run a single turbo walter, no sequential setup at all, i think your getting confused with the 2JZ sequential twin setup ? |
Jacob Thomas
Tinkerer SA VVTi Turbo
Posts: 40 Reg: 01-2010
| i never saw the boost but i might try to get a print out with one on it. From memory he said it peaked at 9psi and faded to 6psi |
Aiden Cheese
DieHard QLD Soarer jzz30
Posts: 584 Reg: 09-2009
| SOUR-ER pun intended? Better than Snorer i guess |
Jacob Thomas
Tinkerer SA VVTi Turbo
Posts: 41 Reg: 01-2010
| well played aiden, i was hoping no one would pick that up! |
Vinh Bui
Goo Roo NSW 96 JZZ30 (TT)
Posts: 3086 Reg: 07-2005
| Have you checked for any boost leaks? I had a pretty big boost leak from my BOV, and after it was fixed I noticed a world of difference. Turns out I'd been driving around for years with this boost leak! |
Aiden Cheese
DieHard QLD Soarer jzz30
Posts: 600 Reg: 09-2009
| Running it in second gear will give lower power readings than third? |
Jacob Thomas
Tinkerer SA VVTi Turbo
Posts: 42 Reg: 01-2010
| no apparent boost leaks but i'll have a more thorough check. Second gear will give higher readings i'm pretty sure |
Aiden Cheese
DieHard QLD Soarer jzz30
Posts: 603 Reg: 09-2009
| Oh i thought it was the other way around, second gear giving lower power, higher torque.. I'm not surprised if i'm wrong. I don't really know - but all i remember is most people use 3rd. |
Daniel Clarke
Goo Roo NSW TT 2.5L 6 cylinder
Posts: 5845 Reg: 03-2006
| 2nd gives lower readings than 3rd . Id try swapping in a different AFM if you can borrow one from someone on here maybe ? |
Jacob Thomas
Tinkerer SA VVTi Turbo
Posts: 61 Reg: 01-2010
| check it, turns out the cat might have been my problem after all!!!! back to relatively normal power levels! This dyno didn't have an wideband af gauge intergrated so i couldn't get a afr printout. But they showed me that it was getting rich really quickly under load. Under boost it was reading down to about 9.5 afr. They said it wasn't abnormal to have readings that low with a factory computer but suggested i get a safc which would help lean it out a little. Thoughts
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Rob Rojo
Goo Roo NSW Soarer Single Turbo Manual
Posts: 4342 Reg: 02-2010
| Thats what I told you last month. lol good result, time to fit a FMIC and wind up the boost. |
Jacob Thomas
Tinkerer SA VVTi Turbo
Posts: 67 Reg: 01-2010
| The cat was the item i first replaced but because the power is very linear on this engine, it felt like something was wrong. My previous car had a much steeper power curve which is what i was comparing it to. Indeed time for a FMIC and EBC. |