Its a 91 Chevy S10 Blazer 4.3L with throttle body injection. It blows no smoke, but i guess their is some hesitation, and the check engine light comes on at times. He asked me what to do, and i told him to replace the oxygen sensor along with the spark plugs to see what happens after that. When he bought it, i told him the catalytic convertor could be shot because of the vehicles mileage, and age. Its got 203K on it! Dispite the problems, the vehicle runs great otherwise. Give me some feedback people!
2006-08-25 13:23:28 · 5 answers · asked by Craig C 2 in Cars & Transportation ➔ Maintenance & Repairs
Use a paperclip as a jumper. Look at the connector under the dash on the drivers side (that you hook a scan tool to) and the right top of this connector. This would be your right. With the ignition switch in the off position, plug the jumper you made from the paperclip into the two terminals on the top right. Now, get a piece of paper and a pencil. Turn the ignition switch to the on position (not start), and count the number of flashes the check engine light on the dash makes. It will be like short and long flashes. Example: the first flash is a quick one time, meaning 1 and the next flash is two long flashes that meaning 2. This is a code 12. Example: three quick flashes, followed by five long flashes. This is a 35. There will be a long pause between the codes. You can do this many times to make certain you are getting the proper codes written down. Now, you must find someone with a code book, to tell you what the codes mean, or you could just go to Autozone, and they will be happy to retrieve the codes with a scan tool at no charge and sell you the part you need to fix it with. You could guess to no end what the problem is, and I'm sure you are on the right track with the O2 sensor, but it just could be something else. Better to be safe than sorry! Usually an engine that runs for a long time with a check engine light on, will take a long time to clear the catalystic convertor, and I have seen some that will require a new convertor to fix the problem, after you fix the sensor. Good Luck!
2006-08-31 11:13:34 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Always drive the vehicle for at least 15 min. before you have an emissions test. Many will fail when the motor is not up to operation temp. It has a sensor problem somewhere. I would take it to auto zone or advance auto an have them read the codes, preferably when the light is on. Probably needs a tuneup too. If the converter is bad do not rod it out, it will definately fail emissions test then. Replace it. Also try runing fuel injector cleaner through it at double strength. This will help the TBI work more efficiently. After all this you may see an improovement in gas mileage too.
2006-08-26 00:40:39 · answer #2 · answered by wzzrd 5 · 0⤊ 0⤋
you are probably right if the trucks converter hasnt been changed then chances it gone. does your friend have modifications? that could be why it wont pass. a tune up the day before the test will help. but it has to be a complete tune up spark plugs the wires the distributor cap and the pin inside the cap has to be changed, oil change. these things might work . hope it works out.
2006-08-31 18:08:16 · answer #3 · answered by George R 1 · 0⤊ 0⤋
you told him right oxygen sensor and converter to save some money just unhook the exhaust and run a rod in the converter and gut it out
2006-08-25 20:31:25 · answer #4 · answered by firefightingexpert 5 · 0⤊ 2⤋
Go to Auto Zone and they will test it for free...they will also tell you what part or parts are defected
2006-08-25 20:37:41 · answer #5 · answered by R W 6 · 0⤊ 0⤋