Temperature Sensor -- 1988 5KSQ - Was Diagnostic Help Needed

[Cody Forbes]

Those numbers will definitely make the engine think it is colder than it is by a significant margin. In theory, this should actually help the cold start a little bit. My money is still on the differential pressure regulator assuming this is a CIS-E. The DPR is the device that actually controls the fuel mixture, they have a fine mesh screen and can sometimes get clogged but other times they just fail electrically. Since you have a Bentley, check out the testing procedure there as I don't recall the details. 

While you're poking around under the hood, a very quick and easy test of the cold start injector is to very, very quickly apply power and ground and listen for it to click. You may also be able to hear it spray fuel but don't be alarmed if you can't. You should definitely be able to hear it click though. If you can't hear it click then visit your Bentley again for this testing procedure. 

-Cody (mobile)

On Jan 1, 2012, at 1:55 PM, b1biker at aol.com wrote:

> Pulled the temp sensor and tested it. Bentley calls for 6000 ohms @ -4 F  and 130 ohms at 176 F.
> My test results are 10000 ohms @ 0 F and 550 ohms @ 176 F
> 
> As previously stated the car won't, or is very difficult to start below 50 F. It seems as though the higher resistance shouldn't effect the cold start functions or am I incorrect in my logic and just need to replace this sender.
> Gary Meier
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