Results 1 to 2 of 2

    Thread: Cranks but no start solved

    1. #1
      What's wrong with my car?
      Join Date
      Jul 2022
      Garage empty: add car
      Thanked 0 Times in 0 Posts

      Cranks but no start solved

      I'm a retired mechanic but I met my match with my wife's Aveo. One day it just died on her in a parking lot so I towed it home. I reasoned (wrongly) that the fuel pump went out so I replaced it. What confused me was that when it first energized it would come up to pressure but still wouldn't start. I had a guy come to my house with all his computers and they told us nothing, no DTC's, nothing! In the end he told me it was probably weak spark so after he left I replaced plugs, wires AND the coil, still no start. I had it towed to a reputable shop, no answers, told me I probably needed an engine?
      One day I'm bumbling around and I noticed all the warning lights came on when I turned the ignition on except the oil pressure warning light. Tore the cluster apart to find nothing so I replaced the oil pressure sending unit. Still nothing. Put a meter on the sending unit and had my son crank the motor, no change. So I set out to change the oil pump (wife wouldn't let me burn the car or give up). What an ordeal! Along the way I discovered, if your oil pan doesn't have a cork gasket, don't try to put one on, your bell housing bolts (yes the oil pan bolts to the bell housing . To make a long story longer it started right up! The ECU saw no oil pressure and wouldn't allow the fuel pump to supply pressure. What's crazy to me is, now my oil pressure light works! Why did the ECU not throw a code?! I fought this for over a month wanting to give up and burn the thing down. Hope this helps someone.

    2. #2
      2004 1.6 Auto Rust Free
      Join Date
      Jun 2019
      Thanked 40 Times in 37 Posts
      Thatís one for the books. I did not know the oil pressure light was in that circuit, buuut when converting old mechanical fuel pumped carburetor vehicles to an electric fuel pump I always hook it up through an oil pressure switch so if the vehicle ignition is on, but not with oil pressure the fuel pump will not run. You know, safety third.
      As for the oil pan gasket I used an Asian manufacture thin fiber type that fit and worked for me.

    3. The Following User Says Thank You to Eg.h2o For This Useful Post:

      crtrett (09-12-2022)

    Similar Threads

    1. '06 Aveo cranks, but won't start. Running out of options
      By Tw1tcHy in forum Troubleshooting and Maintenance
      Replies: 21
      Last Post: 02-07-2020, 11:32 PM
    2. Cranks but no start. Need help please
      By rajesh717 in forum General Discussion
      Replies: 9
      Last Post: 07-06-2018, 11:11 PM
    3. Car Cranks but wont start after dead battery - immobiliser?
      By alexjb1989 in forum Troubleshooting and Maintenance
      Replies: 3
      Last Post: 06-14-2018, 02:04 PM
    4. 08 aveo cranks but won't start
      By Maccrayd38 in forum Troubleshooting and Maintenance
      Replies: 0
      Last Post: 11-22-2017, 07:05 PM
    5. 2005 Chevrolet Aveo nightmare... car cranks just fine but won't start?
      By Jos in forum Troubleshooting and Maintenance
      Replies: 4
      Last Post: 11-03-2017, 04:34 AM

    Tags for this Thread

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts