I have posted multiple times throughout the years about my irratic idling problem, every time i think i have it fixed, I don't. Now as of this year, I have many tuning devices to help me troubleshoot the situation on hand.
Here it is- I will try to explain it the best I can, mods are in my sig.
What I have is an intermittent lean problem. It is not as evident while driving, but horrible at idle.
Idling, 02s will be where they need to be, low to mid 800s....the wideband will show 13.0-13.8, car is idling alright, sounds good....then, out of nowhere, the car will start to sputter and miss BADLY, 02s will drop on the scanmaster wherever it wants to, whether it be in the 300s, the 200s, or the 500s, and the wideband will adhere to that reading, showing it to be lean anywhere from 17.0 to 19.0. Depending on how the car is feeling, it will either stumble and stumble until it dies, or it will stumble then catch itself and idle ok and then do it again, sometimes it doesnt really do it. My BLMS are intermittently low for weeks, this week and last week my BLMS have been locked at 115 while driving, and the Integrator has not varied any farther than 112-124. I have tried so much SH*T to try and fix this issue, and to no prevail.
It also will go lean when accelerating, it will be doing its thing and then i will feel a hesitation temporarily, and the scanmaster will show very low 02 readings, then jump back up where it needs to be.
Tried 4 different mafs, including a stocker, plugs, wires, ign module, coil, injector harness, crank sensor, different computer, checked all vacuum lines, changed regulator, tried different/more grounds, etc. etc. I have even tried relocating positive and ground feeds to the MAF, checked all the pins in the back of the computer....not a trace. I have adjusted the tpc and iac. Nothing.
Sorry for the semi long writeup, if anybody has ANY questions, please please ask.. Need to trace this problem down once and for all. It also did this with the old motor and transmission, so it is perhaps an electrical issue....but where? What could cause something like this? Could my cam sensor be jumping temporarily? Also, my fuel pressure is good throughout the whole scenario.
Here it is- I will try to explain it the best I can, mods are in my sig.
What I have is an intermittent lean problem. It is not as evident while driving, but horrible at idle.
Idling, 02s will be where they need to be, low to mid 800s....the wideband will show 13.0-13.8, car is idling alright, sounds good....then, out of nowhere, the car will start to sputter and miss BADLY, 02s will drop on the scanmaster wherever it wants to, whether it be in the 300s, the 200s, or the 500s, and the wideband will adhere to that reading, showing it to be lean anywhere from 17.0 to 19.0. Depending on how the car is feeling, it will either stumble and stumble until it dies, or it will stumble then catch itself and idle ok and then do it again, sometimes it doesnt really do it. My BLMS are intermittently low for weeks, this week and last week my BLMS have been locked at 115 while driving, and the Integrator has not varied any farther than 112-124. I have tried so much SH*T to try and fix this issue, and to no prevail.
It also will go lean when accelerating, it will be doing its thing and then i will feel a hesitation temporarily, and the scanmaster will show very low 02 readings, then jump back up where it needs to be.
Tried 4 different mafs, including a stocker, plugs, wires, ign module, coil, injector harness, crank sensor, different computer, checked all vacuum lines, changed regulator, tried different/more grounds, etc. etc. I have even tried relocating positive and ground feeds to the MAF, checked all the pins in the back of the computer....not a trace. I have adjusted the tpc and iac. Nothing.
Sorry for the semi long writeup, if anybody has ANY questions, please please ask.. Need to trace this problem down once and for all. It also did this with the old motor and transmission, so it is perhaps an electrical issue....but where? What could cause something like this? Could my cam sensor be jumping temporarily? Also, my fuel pressure is good throughout the whole scenario.
