Possible detonation theory?

Capri306 · 09-26-2001, 10:21 PM

Um, lemme put in my .02, Chris.

The only way the computer knows what temperature the coolant is at is by the coolant temperature sensor. The only way. Now if that sensor is going bad, but its signal is still within acceptable limits, the computer is going to say, "fine, the engine is at -10 degrees" even though it might be 70 degrees outside. You'll only get a code if the sensor is out of preprogrammed limits, and that's 90% of the time what happens. I think if it IS the CTS, then he's got the last 10% covered.

I had a customer with a similar problem. It'd run like crap when cold, then fine soon as it warmed up. Bad temp sensor.

95mustanggt: I think you're on the right track (possibly an ACT), but you should do some more testing. I'd pick up Charles Probst's book on Ford EFI and dive into it. There's a great section on testing sensors, and it's a tremendous asset to any DIYer or Mustang fanatic. Hope this helps.

------------------
Capri306, Moderator, The Mustang Works Online

"PROUD TO BE AN AMERICAN!!!"

Thread Tools
Show Printable Version Email this Page
Display Modes	Rate This Thread
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode	Rate This Thread:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Detonation problems: Help?	95GTS	Windsor Power	14	11-18-2003 10:15 PM
Update On Issues - Driveability and Detonation	SleeperGT	Power Adders	5	05-07-2003 06:56 PM
Aftercooler Solve Detonation Problems?	SleeperGT	Modular Madness	9	12-07-2002 07:13 PM
Detonation + High Temp	richd	Windsor Power	9	10-13-2001 02:15 AM
Car Wars: Detonation Strikes Back	95mustanggt	Windsor Power	15	08-24-2001 12:58 PM

09-26-2001, 10:21 PM	#1
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	Um, lemme put in my .02, Chris. The only way the computer knows what temperature the coolant is at is by the coolant temperature sensor. The only way. Now if that sensor is going bad, but its signal is still within acceptable limits, the computer is going to say, "fine, the engine is at -10 degrees" even though it might be 70 degrees outside. You'll only get a code if the sensor is out of preprogrammed limits, and that's 90% of the time what happens. I think if it IS the CTS, then he's got the last 10% covered. I had a customer with a similar problem. It'd run like crap when cold, then fine soon as it warmed up. Bad temp sensor. 95mustanggt: I think you're on the right track (possibly an ACT), but you should do some more testing. I'd pick up Charles Probst's book on Ford EFI and dive into it. There's a great section on testing sensors, and it's a tremendous asset to any DIYer or Mustang fanatic. Hope this helps. ------------------ Capri306, Moderator, The Mustang Works Online *"PROUD TO BE AN AMERICAN!!!"*