Guys, if I disconnect the battery, should that clear the "check engine soon" light (assuming the problem is fixed)? I put my stock air system back on tonight to send the chip in for a reburn but forgot to plug in the air temp sensor cable. Even after plugging it in, the light was still on.

 

If you disconnect the battery for a few minutes, and assuming everything else is ok with the truck, the light should go out and stay out. You should only have to have it disconnected for a couple of minutes if that long.

Later,
Roger

 

Is it true, that to reset the computer, the battery must be disconnected for aprox. 10-12 hours?

 

Nope, disconnecting it for 5 mins or so should clear it. When you reconnect and turn on the key it goes through a self diagnostic where all the gauges (except boost) peg to the max then return to normal in 2-3 seconds. Also, your radio will also need to be reset.

 

Thanks guys, lights out now.

Noelvm, glad you didnt read this one earlier... I realized right after I sent it that I would probably get nailed with the "try the search" answer

Mike

 

My 99 had the light on when I got it back in May. I took it to a dealer and they updated the computer. I have not had any more problems.
SV

 

StealthL, I had the same thing happen to me in July. To turn light off, the Dealer says they reprogrammed the computer. I did not really understand their explanation. They said Ford or SVT recommended it as an upgrade. Truck seems to run fine.

 

Forgot to mention that the check engine light came on at almost exactly at 15,000 miles.

 

Check and make sure you didn't bump a vacuum line loose when you were replacing your stock equipment.

 

Redlite,
yeh I think the guy I bought mine from knocked the pcv out and ran it a while before he noticed it. I don't know if that had anything to do with it or not.
SV

 

Superchips dist.(in Computer Chip) recommends to remove the neg. cable, turn the headlight's switch 'on' for 5 mins. or longer(suppose to remove all 'residual' voltage from the ECU), and then--turn the h/l's OFF before reconnecting the neg. cable.

The above is what I remember(not quoting Mike word-for-word) and it is what I do when changing the chip or making other mod changes.

Dan