Help! Car suddenly went lean under WOT.
Sep 22, 2007, 06:08 PM
#1
Help! Car suddenly went lean under WOT.
I just recently got my 35R setup and 880 injectors installed and went to the track to do some tuning. Injectors were scaled correctly and the car was running great. First run I hit about 29lbs boost and everything seemed great but, still conservative. My AF/R's were from 10.8 down to 10.1 at redline and peak timing of 17*. I am using ECUflash and Evoscan along with a Zeitronix for tuning.
So next run I simply took .5 out on my fuel cause I wanted to adjust it slowly and left everything else the same. Well I launched and all of a sudden my ZAVT warning light came on for extreme EGT's temps and the car felt like crap. Got back and checked the logs and my AF/R's were high 15's tapering to low 15's at WOT!
What in the world could have happened? The car is fine at idle and part throttle but at WOT goes crazy lean. I added fuel and got it down to high 13's tapering to low 13's but I didnt get another run to keep testing. Something isn't right though because I shouldnt have to be adding so much fuel. My target AF/R's in ECUflash were low 9's just to get the 13 AF/R's. Where should I even start to look? I tested my meth injection and it tested fine, both the pressure and the test spray.
So next run I simply took .5 out on my fuel cause I wanted to adjust it slowly and left everything else the same. Well I launched and all of a sudden my ZAVT warning light came on for extreme EGT's temps and the car felt like crap. Got back and checked the logs and my AF/R's were high 15's tapering to low 15's at WOT!
What in the world could have happened? The car is fine at idle and part throttle but at WOT goes crazy lean. I added fuel and got it down to high 13's tapering to low 13's but I didnt get another run to keep testing. Something isn't right though because I shouldnt have to be adding so much fuel. My target AF/R's in ECUflash were low 9's just to get the 13 AF/R's. Where should I even start to look? I tested my meth injection and it tested fine, both the pressure and the test spray.
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Sep 24, 2007, 05:13 PM
#13
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You should do yourself a favor and buy a pack of 100, and put them under your trunk mat. After you do every other line in the engine bay that sees pressure. And then if it has to come off for some reason cut it, and put a new one on. I'm the zip tie king lol... I always zip lines on and route wires/hoses away to keep things from becoming a problem. Saves so many headaches.
Sorry, I just had to laugh at you trying to tune around it. I've overthought a simple problem like that before too. Glad nothing terrible happened.
Sorry, I just had to laugh at you trying to tune around it. I've overthought a simple problem like that before too. Glad nothing terrible happened.
Sep 25, 2007, 03:20 PM
#14
There you go.
And the cars will blow up because of this, I had one customer crack pistons on the highway when this line blew off so don't listen to them that it can't cause damage that line is mega important.
Check it out guys, please put zip ties!
Sean
And the cars will blow up because of this, I had one customer crack pistons on the highway when this line blew off so don't listen to them that it can't cause damage that line is mega important.
Check it out guys, please put zip ties!
Sean
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