19 replies to this topic

[B-RED]

all of a sudden since two days my engine started to vibrate and respond slower to throttle and has a clicking noise. it almost feels like an old diesel tractor.
changed the plugs and coils, but still it doesn't seem to go away.

pulled the codes and they were just about the oxygen sensor. could it be because of leaking exhaust?

[oleladys850 honest]

B-RED, on 12 August 2009 - 06:10 AM, said:

all of a sudden since two days my engine started to vibrate and respond slower to throttle and has a clicking noise. it almost feels like an old diesel tractor.
changed the plugs and coils, but still it doesn't seem to go away.

pulled the codes and they were just about the oxygen sensor. could it be because of leaking exhaust?

when it stalls, does it start rite back up or do you have to wait for a bit?

maybe fuel pump relay going out? the clicking from the a/c clutch? just a hunch when the a/c clutch goes in and out it seems to hesitate as well. since you have given a tune up. But did you change distributer cap out as well?

[Dave 54]

B-RED, on 12 August 2009 - 06:10 AM, said:

all of a sudden since two days my engine started to vibrate and respond slower to throttle and has a clicking noise. it almost feels like an old diesel tractor.
changed the plugs and coils, but still it doesn't seem to go away.

pulled the codes and they were just about the oxygen sensor. could it be because of leaking exhaust?

Think you answered it yourself. Bad O2 sensor

[B-RED]

oleladys850 honest, on 12 August 2009 - 05:11 PM, said:

when it stalls, does it start rite back up or do you have to wait for a bit?

maybe fuel pump relay going out? the clicking from the a/c clutch? just a hunch when the a/c clutch goes in and out it seems to hesitate as well. since you have given a tune up. But did you change distributer cap out as well?

could be the fuel pump relay.... the a/c compressor doesn't work. i didn't change the distributor cap yet....i was thinking about changing that but didn't want to go about changing things randomly.
i will check the fuel pump relay

Dave 54, on 12 August 2009 - 05:20 PM, said:

Think you answered it yourself. Bad O2 sensor

the O2 sensor has been disconnected since forever, so could that make a difference due to the warmer temperatures??

[FCP Groton]

Why is the 02 sensor disconnected? Also, check to make sure you compression is still good.

[Dave 54]

FCP Groton, on 12 August 2009 - 05:54 PM, said:

Why is the 02 sensor disconnected? Also, check to make sure you compression is still good.

Yeah

[B-RED]

FCP Groton, on 12 August 2009 - 05:54 PM, said:

Why is the 02 sensor disconnected? Also, check to make sure you compression is still good.

the connector from the engine side has gone bad and can't be fixed...just a wire sticking out. this is the old style O2 sensor, just one in the car, no front or back.

http://picasaweb.goo...844702238425074

[Dave 54]

B-RED, on 12 August 2009 - 09:34 PM, said:

the connector from the engine side has gone bad and can't be fixed...just a wire sticking out. this is the old style O2 sensor, just one in the car, no front or back.

http://picasaweb.goo...844702238425074

It's still there for a reason, I would address that and see if your problems exist. But I would do a compression check too.

[Ihatespeedbumps]

I wouldn't jump to the compression test yet since no misfire codes were present.

OP can you post the actual codes stored? Yes you will need to repair or install a new o2 sensor for you car to run correctly.

[B-RED]

Ihatespeedbumps, on 13 August 2009 - 01:32 AM, said:

I wouldn't jump to the compression test yet since no misfire codes were present.

OP can you post the actual codes stored? Yes you will need to repair or install a new o2 sensor for you car to run correctly.

A2
212 Front HO2S signal

A6
314 Camshaft Position sensor (CMP) signal missing or faulty
214 Engine speed (RPM) sensor signal missing sporadically

mine's the "bastard" 93 850, and it has only one O2 sensor. the rest of the 850 series have two O2 sensors.

[RZT5]

all three of those codes could be causing it... I would address all of them

[Ihatespeedbumps]

B-RED, on 13 August 2009 - 01:47 AM, said:

A2
212 Front HO2S signal

A6
314 Camshaft Position sensor (CMP) signal missing or faulty
214 Engine speed (RPM) sensor signal missing sporadically

mine's the "bastard" 93 850, and it has only one O2 sensor. the rest of the 850 series have two O2 sensors.

I failed to see that you had a 93 Odd ducks.

I think your problem is probably related to a faulty CMP. See if you can swap out a CMP and get that 02 sensor fixed asap.

[oleladys850 honest]

Ihatespeedbumps, on 13 August 2009 - 02:09 AM, said:

I failed to see that you had a 93 Odd ducks.

I think your problem is probably related to a faulty CMP. See if you can swap out a CMP and get that 02 sensor fixed asap.

Dude search for the fuel pump relay bypass trick and rule that out first. I say this because I recently had similar issues and bought/ replaced the 100.+ cam pos sen.
only to find out a week later it was the fuel pump relay. Maybe it is the cam pos sen. But its an easy test on the fuel pump relay to rule it out.Just a matter of jumping 2 connectors. Good luck

[B-RED]

oleladys850 honest, on 13 August 2009 - 08:53 AM, said:

Dude search for the fuel pump relay bypass trick and rule that out first. I say this because I recently had similar issues and bought/ replaced the 100.+ cam pos sen.
only to find out a week later it was the fuel pump relay. Maybe it is the cam pos sen. But its an easy test on the fuel pump relay to rule it out.Just a matter of jumping 2 connectors. Good luck

turns out the #4 cylinder has 15lbs compression and the exhaust valves are gone bad...

[RZT5]

B-RED, on 13 August 2009 - 04:14 PM, said:

turns out the #4 cylinder has 15lbs compression and the exhaust valves are gone bad...

haha! that will do it

[B-RED]

RZT5, on 13 August 2009 - 04:45 PM, said:

haha! that will do it

ya so much for my luck...
how much would that kind of a job cost usually to fix?

[RZT5]

depends whats causing the bad compression. if the cylinder walls are ok and you just need rings and the head re done maybe 2500? It would be cheaper to just buy a used engine to drop in, or scrap the car and buy something else

[B-RED]

RZT5, on 13 August 2009 - 05:41 PM, said:

depends whats causing the bad compression. if the cylinder walls are ok and you just need rings and the head re done maybe 2500? It would be cheaper to just buy a used engine to drop in, or scrap the car and buy something else

could the bad compression be be because of bad CMP and RPM sensors?
there are codes for those two.

im trying to fix it with the help of a friend who has worked on engines, so hopefully i won't have to shell out that much. i can't afford a new engine let alone a newer car at this time.

any writeup out there on changing the valves?

[RZT5]

B-RED, on 13 August 2009 - 11:14 PM, said:

could the bad compression be be because of bad CMP and RPM sensors?
there are codes for those two.

im trying to fix it with the help of a friend who has worked on engines, so hopefully i won't have to shell out that much. i can't afford a new engine let alone a newer car at this time.

any writeup out there on changing the valves?

no, compression is a purely mechanical thing, sensors have absolutely nothing to do with it, its a measure of how much air leaks out of the combustion chamber when the piston compresses it against the valves. Usually people just take the whole head to a machine shop to have any sort of valve work done, but i guess there's no reason you cant do it yourself if you have the right tools. I don't know where to find a writeup on it, and I've never done any head work myself so I cant help you there. be aware though that just changing the valves will only fix the compression issue if they are the only thing causing the low compression.