Question about Chevrolet Cavalier
I have replaced tps sensor/crank sensor/ox/ sensor/ignition module/cleaned egr valve. fuel pressure 40 lbs----- running and after shut down .new plugs and wires and new fuel filter. have not replaced ---- map sensor/ idle control valve/or coolant sensor does NOT appear to have a vacumn leak, sprayed all around intake looking for a rise in rpm.
Posted by Anonymous on
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: buick lesabre nightmare
Need to get a scan tool and look at the data stream while it is running for alot more info.Also any trouble codes.Sounds like initially,the engine isn't getting any fuel.I would have a pressure gauge connected to the fuel rail on the engine,so i could monitor the fuel pressure while all this is going on.Items to look at on the data stream would be timing,what timing is the PCM commanding for the engine.Also,have you checked for continuos power feed to the coils during this no start condition,and fire at the plugs while cranking.You could possibly still have spark,but maybe it is extremely weak?I have seen bad ignition switches cause weird problems before too.Many things power up through the ignition switch,just a thought.Have also seen bad PCM's cause strange problems..38 volts is a little on the low side for GM.Usually see those at,at least .50 and up,and rise steadily while pressing the throttle,up to just under 5.0 volts.Potentiometer with 5 volt supply.Vacuum leak can be checked with engine running at a steady idle speed,spray brake cleaner all around the intake manifold and listen for engine speed change.
Posted on Jul 31, 2008
its just white cuz i too the cat off..
cuz i thought my proble could have been to do with the cat...
cuz i lost power driving up hills and on highways now it just will start the die right away
or start and idle really bad...
i was thinking crank sensor.. or injectors
Posted on Oct 01, 2008
Find your firewall electrical junction block (where all the wires enter the cabin on the passenger side) and with a zip tie pull up the wire bundle so it does not ride on the upper tie rods and, fasten the zip tie to anything that is solid in the engine compartment and, let me know what happens
Posted on Jun 01, 2009
Are you sure the spark is sufficient? I have seen weak coils cause your problem also bad coil wires loosing to much voltage to the distributor.
Posted on Oct 24, 2009
Tips for a great answer:
Nov 02, 2014 | 1991 Chevrolet Cavalier
May 11, 2014 | 1993 Buick Riviera
Jan 03, 2014 | 2000 Chevrolet Cavalier
Apr 11, 2013 | 2001 Ford Focus
Sep 12, 2012 | 1991 Oldsmobile Cutlass Ciera
Apr 25, 2017 | 1993 Chevrolet Cavalier
Aug 21, 2009 | 1997 Chevrolet Cavalier
Aug 21, 2009 | 1991 Chevrolet Cavalier
May 17, 2009 | 1991 Honda Accord
31 people viewed this question
Usually answered in minutes!