mrhtran1

Last week, I drive the car it was running normal, drive it home park in the garage. The next day the car cranking normal, but won't start. Battery good, (recharge battery after cranking a while), Gas tank show having a quarter tanks, (still added 4 gallon more to be sure).
I check the code and it have P0118 (Coolant Temp Sensor) so I replace the sensor (twice) the code still there, (maybe it need to relearn) but it should not prevent the car from starting? Then I replace the crank sensor, still not starting. Check spark with Ignition Tester, it have spark, Check fuel pressure: it have 55 lbs at test port rail. Do engine compression test: 200 lbs pressure. I notice that when I cranking the rpm not jump up to 2 or 300 rmp like it should be? please let me know what else I should check? Help, Thanks.

chem_man

Did you clear the P0118 code using a code reader? If the PCM does not like what it is seeing then it, the PCM, will not allow the engine to start. It will let the engine crank forever, but not start,

Also, by replacing the crankshaft sensor, your TrailBlazer now needs to have a CASE relearn performed on it in order for the engine to run properly.

I suggest that rather then guessing as to the cause of the no start condition, and to save you money from purchasing unnecessary parts, you diagnose the problem and then purchase the appropriate parts.

By the way, have you checked to see what the fuel pressure is? If you do not have a fuel injection system pressure gauge, AutoZone, Advance, and O'Reilly all have a specialty tool loaner program for tools like a fuel injection system pressure gauge.

mrhtran1

Thanks chem_man for the response. I found out what wrong with my car, the rats chew off the wiring connector that go to fuel injections. Fixed the wiring and it started right away.

chem_man

Thanks for letting us know you found and fixed the problem!