Serious bucking has occurred just now !!!

[Anonymous]

Just had a serious issue in my 93 MTX I was on my way home tonight just getting in from NY and at around a cruising speed of 50 this hard bucking occurrd almost like the transmission was slamming and during All of this the tachometer stop working for a moment as i was going through gears it felt like the car lost power and starting putting like when I would engage the clutch and go into gear sounded almost like it was 2 stepping I can't really explain but then it stopped and everyhting started working fine the trans and all started shifting smooth again and the tachometer started working again for about 5 to 6 miles then the bucking occurred again and the tachometer stopped working again right up the street from my house then it stopped again and it's working normal I need help on this

 

[rubydist]

That is exactly the symptom I had when I had a failing cam sensor. Curiously, a sick cam sensor can cause the engine to stall while a dead cam sensor will not have any effect other than making the pcm guess which is #1 cylinder during startup.

I would change the cam sensor post haste.

 

[zoomlater]

It wouldn't hurt to pull the codes, but I had the same thing as rubydist mentioned and it was my cam sensor

 

[Anonymous]

That is exactly the symptom I had when I had a failing cam sensor. Curiously, a sick cam sensor can cause the engine to stall while a dead cam sensor will not have any effect other than making the pcm guess which is #1 cylinder during startup.

I would change the cam sensor post haste.

It wouldn't hurt to pull the codes, but I had the same thing as rubydist mentioned and it was my cam sensor

codes came up as 111, 10,176,177,214,219,542 and 543

 

[Anonymous]

That is exactly the symptom I had when I had a failing cam sensor. Curiously, a sick cam sensor can cause the engine to stall while a dead cam sensor will not have any effect other than making the pcm guess which is #1 cylinder during startup.

I would change the cam sensor post haste.

and that would retard the rpms and make the car **** hard like its tugged ?

 

[rubydist]

111 = all good, that means no codes were generated while you were running the test
176 = lean on front bank
177 = rich on front bank
214 = error in CID circuit (cam sensor)
219 = spout circuit failure, timing defaulted to 10*
542 = fuel pump secondary circuit issue (this gets set when the engine stalls)
543 = fuel pump monitor circuit shows no power (never seen this one)

I would change the cam sensor and reset the codes, and see what comes back after a week or two.

The sick cam sensor can cause the cylinders to fire at the wrong time, which will cause all the symptoms you describe above.

 

[Anonymous]

111 = all good, that means no codes were generated while you were running the test
176 = lean on front bank
177 = rich on front bank
214 = error in CID circuit (cam sensor)
219 = spout circuit failure, timing defaulted to 10*
542 = fuel pump secondary circuit issue (this gets set when the engine stalls)
543 = fuel pump monitor circuit shows no power (never seen this one)

I would change the cam sensor and reset the codes, and see what comes back after a week or two.

The sick cam sensor can cause the cylinders to fire at the wrong time, which will cause all the symptoms you describe above.

thanks I changed the sensor seems to be running on all 6 cylinders now