99 blazer wont start?

Does it have spark? Pull a plug wire and take a spare spark plug and see if you have spark. Can you smell fuel after you crank it over? Can you hear the fuel pump run for a few seconds after you turn the key to run? I'd check to make sure you have the right fuel pressure. All the sensors are monitored by the ECM and if one wasn't working you would have a check engine light with a code stored.

Definite seems like a gasoline pump. To know for certain the pressure wishes to be measured, takes a instrument now not each person has. It must be within the 40-55lbs variety. If it used to be a safety hindrance it could begin mostly and run for 2 seconds. If it have been a relay, it wouldnt even attempt to run. Take it to a store. Have it towed by way of a tow truck, additionally dont attempt yourself, if executed incorrectly harm to transmission can happen exchanging a fuel pump isnt somthing that an day-to-day joe must attempt these gas pumps are delicate, they are electric and as a result are cooled by way of the fuel within the tank, most likely of thumb i tell humans is to no longer let the tank go below 1/4 to be certain theres plenty of gas to chill the pump.

You need to make sure you are getting the right firing order and are getting good spark in your motor.