QuestionQUESTION: i have a 97 elantra that starts and stalls it floods the plugs if i unhook the injectors it will start and run for about 5 seconds then stalls (burns the fuel in the cylinders) i have replaced the fuel pressure regulator and does the same thing... very confused can anyone help?????? Thanks Dan
ANSWER: Hi, Dan. The symptoms you describe are most likely the result of the engine control module (ECM) receiving faulty information from one of the sensors. The coolant temperature sensor and air flow sensor are provide the primary information the ECM uses to determine amount of fuel. Readings from the throttle position sensor play a lesser role.
You might start by checking for any diagnostic trouble codes if you can do that. In the event you can actually limp the car somewhere, AutoZone and AAMCO have advertised they'll check codes for no charge.
If there are no trouble codes stored, then the next step would be to use a scan tool to read the data stream from the ECM. Presuming you don't have access to such a tool, you'd need to take the car to a reputable and competent shop with such a tool to have this diagnosis done for you.
You could try, one by one, wiggling the connectors on the throttle position sensor, air flow sensor, and coolant temperature sensor to see if any have an effect on the way the car runs. If one of them has an effect, you should expect that sensor is defective or there's simply poor contact in that connector.
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QUESTION: i have a brand new mac scanner and there aree no codes other than the ones i creat by unplugging the injectors is it possible that the injectors are bad this car did sit for about a yr and ran for about 2 days with the old gas
AnswerIt's doubtful there's a problem with the injectors. If there were, it'd would have to be with all four injectors, and that simply isn't very likely. If the car sat for a year, however, there's a reasonable possibility you have a problem with the fuel itself.
