CTS ohm ranges

[xbalancex7]

my cts drops to zero resistance when engine temp is running midrange. is that really bad? it does have a hard start problem and when cold the cts reads at about 1500ohms

 

is that too far out of operational ohm ?

[Gloyale]

  xbalancex7 said:

my cts drops to zero resistance when engine temp is running midrange. is that really bad? it does have a hard start problem and when cold the cts reads at about 1500ohms

 

is that too far out of operational ohm ?

 

 

Zero is definatly bad. However,as the temp rises, the resistance is lowered, From 2-3k ohms cold, to 50-100 ohms hot. Make sure you are using the lowest scale on you're meter. 2k ohms or less.

 

But yeah, if it drops to completely zero that's bad for sure

[xbalancex7]

I tried it today (cold start) and after seafoaming the IAC, and testing CTS........car seemed to fire right up and idle very well

 

now......here is what I did, started car with CTS disconnected (ran like crap) for ohm testing, got it warm reved to 2000rpms,.......disconected IAC vacuum lines....poured seafoam directly into the IAC tube, let the smoke and engine work through the treatment............then reconnected the vacuum hoses to IAC........next wait hours to let it get cold.

 

next morn I went to start and car ran like crap.......but I remembered Opps! forgot to reconnect CTS duh.........let it get cold again many hours pass.......wam bam thankyou ma'am the car fires right up well.......so it was either the seafoam treatment or me unplugging and replugging the CTS......i have read some threads that say the contacts on the CTS have made them bad.....so who knows, either way, for cold start problems definitely check CTS or IAC. Clean them, jiggle them, do whatever you can cause those parts cost mega money.

[xbalancex7]

dag-on repeat post, I want to erase this second mimic post........

[Gloyale]

  xbalancex7 said:

Clean them, jiggle them, do whatever you can cause those parts cost mega money.

 

 

Really, in all relativity, the CTS is an inexpensive part. Bad sensors do happen.

 

That said, often the issue is corrosion or contact, not a failed Sensor.

[GeneralDisorder]

  xbalancex7 said:

Clean them, jiggle them, do whatever you can cause those parts cost mega money.

 

They aren't that expensive really. The CTS is under $50 - usually around $35. The IAC's are more, but they rarely fail and there's thousands of used ones to be had for next to nothing.

 

GD