Engine Performance problem
2002 GMC Sonoma 6 cyl Two Wheel Drive Automatic
Dear Tech:
First off i bought this used drove it home and around town for about 100 miles no problems alittle hard to start but that was it. I went outside about 2 weeks of truck sitting in driveway and it wouldnt start so i changed plugs, wires, cap and rotor. thinking that was it since it was hard to start when i first got it. they was in really bad shape when i changed them, but when i tried to start it the truck still wouldnt run. so i checked to see if i was getting fuel and i was getting fuel all the way to the injectors, i checked spark and i have fire. so i changed injectors and regulator thinking that may be the problem and still wont start. if i spray crab cleaner in intake it will fire and stay running i can even turn the key off and wait a hour and it will still start now that its warm but after engine cools to outside temp(which is about 60 right now) it wont start unless i use carb cleaner to help it. i pulled regulator off and changed it again thinking i may have gotten a bad one and still didnt change anything. i checked fuel filter and its fine. but i dont have a pressure tester to test fuel pressure to see if pump is not putting out the required spec of 55-61 psi. before i go and put more money in a tester is there anything else that may cause this problem
2002 GMC Sonoma 6 cyl Two Wheel Drive Automatic
Dear Tech:
First off i bought this used drove it home and around town for about 100 miles no problems alittle hard to start but that was it. I went outside about 2 weeks of truck sitting in driveway and it wouldnt start so i changed plugs, wires, cap and rotor. thinking that was it since it was hard to start when i first got it. they was in really bad shape when i changed them, but when i tried to start it the truck still wouldnt run. so i checked to see if i was getting fuel and i was getting fuel all the way to the injectors, i checked spark and i have fire. so i changed injectors and regulator thinking that may be the problem and still wont start. if i spray crab cleaner in intake it will fire and stay running i can even turn the key off and wait a hour and it will still start now that its warm but after engine cools to outside temp(which is about 60 right now) it wont start unless i use carb cleaner to help it. i pulled regulator off and changed it again thinking i may have gotten a bad one and still didnt change anything. i checked fuel filter and its fine. but i dont have a pressure tester to test fuel pressure to see if pump is not putting out the required spec of 55-61 psi. before i go and put more money in a tester is there anything else that may cause this problem
Oct 2, 2009 at 8:07 PM