11-12-2009, 04:38 AM
Join Date: Nov 2009
Location: Stuttgart, Germany
Total Cats: 0
Link IAT-sensor issues
just registered a few days ago and here comes my first problem - should I re-consider signing up at this board ;-)
I have an issue with my 1992 FM2 with a Link ECU. Sometimes, my Intake Air Temperature reading on the link keypad showes 100 C. The ECU won't let the engine go into bosst as a precaution, of course. Two days ago, I thought, I found the reason in a bad sensor ground on the IAT sensor. So I replaced the ground wire and terminal, cleaned the contact spots and it worked for one single day. Again, I have the same problem. Sometimes everything is good when I start the engine. Later, the IAT reading would go to 100 C again when I hit more then 4k rpm for example. And sometimes the reading shows 100 C already when I start up the engine. I have already been trying different spots to ground the sensor cable but nothing would improve the situation. So much about explaining my situation - I hope my english is good enough to explain to you what's going on ;-)
So my questions would be
1. Could this be a bad sensor? B/C sometimes it reads right and sometimes not - maybe vibration issue?
2. If it's not the sensor, what could I do? Run a new wire from the sensor to the ECU, I guess? Or is the grounding point on the intake manifold just a bad idea? I don't think so, since it has been working there for quite a while.
Thanks for your advice!