I replaced the plugs and wires twice already,they all look good and were burning white and all of them the same. I checked the codes,no codes. I did notice the overflow container goes down but not that much. The tailpipe is black on the inside. I did not due a compresion test yet.One owner car that I purchased from my mother.I never see any smoke from tailpipe.
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Re: 97 Buick 3.8
Exhaust tailpipe black on the inside is normal, check if you get white smoke from exhaust when engine is hot that means head gasket problem. If car fail going up an hill it is often a compression problem. If car has automatic transmission, it can be also tranny not shifting down gear, this usually is a module problem, but you told me you checked this already. Also a faulty throttle position sensor can give transmission problems, but when this is faulty you get troubles with gears on all situations.
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If bearing/speed sensor assembly has been changed most lokely wiring. Use an ohm meter hooked between the two pins of the wiring harness side plug end. There will be resistance on this plug. Move/bend the wiring while the meter is hooked up and observe the reading. If the reading changes drastically or goes OL then the harness is bad. These harnesses are common problems as they flex as the wheels are turned. The dealership sells them for replacement.
Did you also replace the spark plug wires? The burn lines on the ceramic would indicate that it's jumping fire. Are the burn lines on ALL the plugs or just one or two? If you look closely at the wires in the dark, you will be able to see the spark jumping to ground if the wires are bad. If you have already replaced the wires and still have that issue, it's possible that you have a bad coil pack or ignition module.
Might be dirty injector or burned valve. Check the connector on the injector. If good, run a compression test on all cylinders. If compression is significantly lower on #3, the head will have to come off. If compression is good, pull up the injector rail with injectors and wiring attached. Watch the injectors spray as someone cranks the engine.
Hi, this is a misfire on cylinder 3. #3 is third back from the fan belt. Remove the spark plug, reattach the wire, and hold the plug to the engine metal while someone cranks the engine to see if the plug is sparking. If not, you need to replace the wire or the plug. Try changing the plug first, as wires are expensive. If the plug sparks OK, then the problem is likely a burned exhaust valve or a clogged injector. These require more work. Please get back to me if you want tpo know how to check those.
did the car over heat for long? there could possibly be damage to your head like warping due to overheating and blowing a head gasket or something along those lines . first check the oil dipstick is it milky? then check the coolant is it oily? and when it is running is it blowing any white smoke? if you replaced the plugs and it is misfiring did you plug the wire all the way back on the plugs if not then the problem is a plug wire being loose and loosing connection with the plug. sounds like a simple fix if you don't have water in your oil or white smoke coming out the exhaust. troubleshooting it can be a bigger job but if you nail the right symptoms down you can corner the problem. like if it is a coil pack or bad wire switch them with another one and see if the problem follows the wire or coil pack.for instance take the number one plug wire off and the number two wire off and put the number one wire on number two and see if the number one misfires. if so then the wire is the problem if not then try numbers three and four until you find out which cylinder is the culprit. good luck and happy hunting.
The code is for the TPS , several things can cause this tps not plugged in , or plugged in after the car was started. If the car runs good go to auto zone let them erase the code for free with their scanner and then see if it comes back on. most likely it was just a accident. but go check to make sure it is plugged in and that the wires to it are not pinched in any way.