Quote:
Originally Posted by Ed Wright
Al, make bigger fuel pressure changes. It doesn't drop cylinders? Just dies? If it does not drop cylinders it sounds rich to me. Like Joe said, the coolant temp sensor may be out of calibration. Usually if one is too lean to idle in gear they will surge some in neutral. If you have an open in the coolant temp sensor or it's circuit the ECU will consider that -40 deg F. If that ECU has a scan function check that out. If it shows -40, take a piece of a paper clip and jumper the 2 pins in the coolant temp connector. You should then see something like 300 + deg F. If you it's the sensor. If not it is a wiring issue.
|
Coolant and inlet air temp sensors seem to be working fine. I've datalogged and they seem in sync with what they should be. I have the temp correction on off because I can pretty much control the coolant temp. It is setup to run at 150* to 160*
I've tried 2 different manifolds with different fuel rails injectors and inlet air sensors. I've put a timing light on it so I know nothing moved.
This problem started when I tried the launch control function on the ecu. At first it would just shut down when I got up around 3000 rpms.
I was able to put the car in gear with no problems. It only showed when I was on the 2 step. Since then it has degraded to not wanting to idle in gear at all.
I have turned off the launch control no change, removed the program and installed one that I used prior to trying the 2 step many times now. And it doesn't seem to matter.
I tend to believe I hurt something when trying the 2 step. And I'm trying to figure out what. The other day it got to where I couldn't even start it (I was actually happy I figured now I can find it) but the next morning it started. So I'm tending to think it's something heat related electrically.