KW87GTA

My autoxray, says that my MAT sensor reading is too low, and I see the data, but is there a way to test to see if the sensor itself is bad. I have a relocated MAT that is positioned up near my induction, does this make a difference. I'd like to make sure it is the actual sensor that is gone before I change it. Thanks.

------------------
87 GTA 350 L98
K&N filter, beefed up TH-700r4, Accel Manifold, Superram, Fuel Press. Regulator 49.5psi, air foil, modified MAF, SLP cold air box, Accel 24lb Injectors, Hypertech Thermomaster chip w/160 thermostat, MSD 6AL and Blaster 3, B&M shift kit & megashifter, Moser Ford 9in Rear with Richmond 3.50 and locker, Edlebrock TES headers and Cat Back,Gutted cat, removed emissions, Hotchkis setup in rear, Poly suspension and Koni in the front, relocated MAT, bypassed TB coolant

Grim Reaper

I have found my relocated MAT to be consistently higher by 2*C than the actual ambient air temperature. This is with the car having just coming off highway driving which is the lowest of all. I find that in city traffic I do get higher readings just because the whole underhood is getting hotter due to low air movement.

If you are get significantly different readings than the actual ambient air temperature, especially lower (I can see higher in traffic) then the only other problems would be your connection, ecm or scan tool. You can test the connection and accuracy of the ecm scan tool by inserting a 4.7K ohm resistor into the connector. Your scan tool should read 55*F.

If everything pans out by using the 4.7K resistor, then I would say its time for a new MAT.

[This message has been edited by Glenn91L98GTA (edited July 06, 2001).]