Question about 1992 Oldsmobile Bravada
I have a 1991 Olds Bravada with a 4.3 tbi engine. It is idling rough and backfiring through the tbi when you first crank the engine, could it be the timing or something like that? I changed plugs wires cap and rotor, also replaced the ignition module. Please help!!!!!
Ok guys, let's fix these things here!
Just went through this myself, so do the following:
Go to your local parts store and buy a Haynes Repair Manual.
You need to read the book first, learn how the ECM (Electronic Control Module) works. You'll see that there are alot of sensors and components that make up the fuel emissions bologna.
The nice thing about this system is not only does the ECM control all electrical functions, it also trouble-shoots it's self. When a component or sensor goes out, the ECM stores a code for that event in it's memory. You can use the Haynes Repair Manual to put the ECM into diagnostic mode and thus read any codes present.
So, all that's left is replacing what the EMC tells you too! :) Good Luck!
Posted on Feb 06, 2009
You have a vacuum leak,the ecm is giving too much fuel. because the manifold vacuum is low,the ecm thinks the rpm is much higher.
if you look at the throttle body injectors,you will see there is far too much fuel.the computer is also advancing the timing forward,causing the backfire.
another thing is to make sure the ground ******** the block is ok and any chassis grounds.
third ,check inside the distributor and make sure there is no magnet cracks near the rivets in the assembly,or any corrosion.
Posted on May 09, 2009
Sounds like you mixed up the spark plug wires. re check your firing order
Posted on Nov 17, 2008
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
Tips for a great answer:
Dec 03, 2016 | Cars & Trucks
Dec 29, 2015 | Cars & Trucks
Jul 02, 2013 | Cars & Trucks
Feb 23, 2013 | 1993 Pontiac Grand Am
Nissan Pathfinder Backfires? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-backfires.html
---------How to adjust rpm? http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
------------Engine cuts out at 3000 RPM? http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html
----------This will help.Thanks.
Feb 17, 2012 | 1992 Nissan Pickup
Jul 16, 2011 | Oldsmobile Cutlass Ciera Cars & Trucks
Dec 01, 2008 | 1990 Oldsmobile Cutlass Ciera
669 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: