» » »

Chevrolet Q&A

Ask Your Question

1990 Chevrolet Lumina Question: when i start my car it idles ok until i touch the gas pedal.

 

Question

sieggy023, San Lorenzo, CA, May 21, 2012, 11:22
 Rookie

once i try and give it some throttle it bogs and dies out. as long as i dont touch the gas pedal it will stay idling for a long time but then eventually dies and when i try to go and start it again sometimes it just keeps cranking and wont start at all. what could be the problem? do u think maybe the fuel pressure regulator is bad.

2 Answers
Flag This
  • Answer #1

    Greg's Orange Auto (13671 Answers) , Orange, CA - (714) 361-9386
    globalhelper May 21, 2012, 11:56
     Master

    HAVE FUEL PRESSURE TESTED. SOUNDS LIKE ITS ON THE LOW SIDE AND WOULD CAUSE THIS

    Flag This
  • Reply

    sieggy023, May 21, 2012, 21:52
     Rookie

    it is low but what would cause this?

    Flag This
  • Reply

    globalhelper, May 22, 2012, 05:34
     Master

    if its the original pump its just wearing out and can't build the pressure required to run car under load

    Flag This
  • Reply

    sieggy023, May 23, 2012, 08:37
     Rookie

    i already replaced the fuel pump and filter when i first started having this problem. with a pressure guage attached to the test port i get about 40 psi when i turn the key to the on position but when the car is idiling its at about 20 - 22. thats not enough pressure is it? Also if i push the valve to release the pressure barely any fuel comes out.

    Flag This
  • Reply

    globalhelper, May 23, 2012, 12:20
     Master

    I BET YOU BOUGHT AN AFTERMARKET FUEL PUMP. THAT MIGHT BE THE PROB.NOT ENOUGH FUEL PRESSURE OR RESTRICTION IN LINE WHICH I DOUGHT

    Reply
    Flag This
  • Answer #2

    MECHANICS R US from MECHANICS R US, June 26, 2012, 15:03
     Enthusiast

    Hard to answer until you have the computer scaned for codes and some basic visual checks and other test

    Reply
    Flag This