i have a check engine light but whant to see if my fellow so cal thirdgeners can help me out...
car has a check engine light pulled the code it is code 23 mat sensor i used a flow chart to diagnose as best of my ability but changed the ecm nothing changed the mat sensor nothing still comes on and at this rate it will never pass smog and run how its supposed to mechanically and emission wise also noticed that the fans dont turn on either so im all ears to diagnose this if it does not work will take it back to dyno don and let him work his magic wich is my last resort

 

check the IAT?
maybe a bad ground..check the wiring on the firewall/heads the grounds might be loose?
just my 2cents..

 

Use this:
http://www.gearhead-efi.com/gearhead...c/TPIcodes.pdf

If there is a problem, it WILL be located here. I had a code 42 that indicated a faulty ignition module/ecm, I had the module tested twice and both times it turned out fine. The problem ended up being a shorted wire that runs to the module.

 

If you changed the sensor and the code remains, then there must be a short or open in the wires to the sensor.

 

i will check the wiring completly hope fully i find the problem so it can get smogged soon i will also check the firewall/heads ground for good contact

 

thanks for the link looks like a lot of usefull info i will use it to the best of my ability i hope its something small

 

i think its gona be short or a wire got kinked to much and its almost cut or not making contact any more

 

ok this is wierd i made sure that the wires were good behind the block the ground i took the car for a drive around the block surpisingly it did not turn the check engine light on as it would normally do it lasted a good while but pulling back into the garage it started to head up the fans did not come on because i could not hear them running and then the check engine light came on could this be setting off the code:23 for the mat sensor i think it has something to do with it

 

Can you drive it over Thursday or Friday?

 

yeah I'll take it tommorow

 

Did you ever find out what the problem was?
I'm all ears...

 

no i still cant figure it out i had a miss hap with my 1LE brakes and could not make it to dyno dons shop he was going to look at the car and figure what the problem is