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SD Switch Help / Car Started Now No Start

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spadepro22

15+ Year Contributor
1,206
14
Mar 13, 2008
Seneca, South Carolina
Switched to SD today and started it up and took a little drive and it wasn't running smooth so I took it back home to take a break and when I went to try to dial in combft again the car won't start. It just turns over and over. What do I need to check for? This is just a log I'll post to make sure its setup right. The car ran fine before the switch.
 

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Looks to me like your coolant temp sensor took a shit, your ambient temps are 120* according to the IAT but your coolant temps are 39*. I don't think so...

Ohm it out using a multimeter before you replace it.

Below is a chart of what resistance reading you should get if the sensor is working correctly according to the temp. of the coolant.
32*F = 5.9k ohms
68*F = 3.5k ohms
104*F = 2.7k ohms
176*F = 0.3k ohms​

:dsm:
 
Looks to me like your coolant temp sensor took a shit, your ambient temps are 120* according to the IAT but your coolant temps are 39*. I don't think so...

Ohm it out using a multimeter before you replace it.

Below is a chart of what resistance reading you should get if the sensor is working correctly according to the temp. of the coolant.
32*F = 5.9k ohms
68*F = 3.5k ohms
104*F = 2.7k ohms
176*F = 0.3k ohms​

:dsm:

Problem solved, wire was broken. Now when I get combft close to 0 the airflow/rev is high and I cant seem to adjust it down by lowering the # that is tracked in the sd tab. Took it all the way to 0 and the airflow/rev stayed the same.
 
Problem solved, wire was broken. Now when I get combft close to 0 the airflow/rev is high and I cant seem to adjust it down by lowering the # that is tracked in the sd tab. Took it all the way to 0 and the airflow/rev stayed the same.
I'd be more helpful if I could look at a log? ;)

I've got your list of mods in your profile, just confirm they're accurate and include your base fuel pressure.

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Oh, and your welcome.

:dsm:
 

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