How would you describe this? What does it result from? My max is making some weird sounds over 40-50mph, and they get faster in repetition as i increase speed.

As a side note, im gettin a new TPS tomorrow, think that would fix it? My car was doing the almighty stalling bs.

Any thoughts / opinions would help, thanks.

(97 max, auto)

 

Knocking and pinging is not always audible. But it sounds like metallic tapping. You shoudl also feel a lose of power as the knock sensor will kick in and retard timing. Bad gas will cause pinging, also are you running 91+ octane gas? If not, that is more than likely your problem. Also a bad O2 will cause the car to run lean causing pinging. TPS may cause the problem as well.

-shing

 

Hmmm.. Mine sounds like a thud thud thud. I thought maybe it was tires, but they seem ok (not flat).. they were balanced, and i didnt hit anything so, no clue there.

Also, I don't have a loss of power, unless its when the TPS feels like stalling my car for a lil bit.

Btw, pinging sounds like knocking, i take it?

And i use 92 all the time. No 89 ever. :>

Thanks 4 yer thoughts.

 

> Btw, pinging sounds like knocking, i take it?

Pinging, also called engine knock, has a sound often described as an unpleasant irregular metallic rattle, similar to shaking a coffee can full of marbles. Pinging is pronounced when the engine is under load, such as climbing a hill or rapid acceleration.

Causes of pinging include:
- fuel AKI too low, and Knock Sensor not working
- ignition timing too far advanced
- lean mixture
- carbon deposits in combustion chambers
- EGR valve stuck closed
- EGR passages obstructed with soot
- EGR vacuum signal hose(s) split, broken, or disconnected
- engine running too hot

Diagnosing and repairing this problem should not require dealer service. Look for an independent shop with a good reputation. Ask your friends, neighbors, coworkers for recommendations. Sometimes an experienced Nissan dealer technician will open his own business. That's a good man to know!

 

I have no pinging sound, but my engine is retarding my timiming(hesitation) around 3700rpm and ~4400rpms. I have replaced spark plugs, fuel filter, checked TPS Ohms readings (did yesterday--check out perfectly), re-did dealer's incorrect vaccuum tube layout for supercharger. My original problem started when I got ecu error code 0315 (not in older manuals)...but it is Evap canister control value stuck open. I had it replaced(light is off), but I still have my drivablity problem. What is a good way to diagnose this stuff. Any other thoughts?

Matt P.

Matt P

 

> I have no pinging sound, but my engine is retarding my timiming(hesitation) around 3700rpm and ~4400rpms. I have replaced spark plugs, fuel filter, checked TPS Ohms readings (did yesterday--check out perfectly), re-did dealer's incorrect vaccuum tube layout for supercharger. My original problem started when I got ecu error code 0315 (not in older manuals)...but it is Evap canister control value stuck open. I had it replaced(light is off), but I still have my drivablity problem. What is a good way to diagnose this stuff. Any other thoughts?
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If your timing is being retarded, that is being done by the Engine Control Module (the computer) in response to a signal from the Knock Sensor. The ECM is doing you a favor, protecting your engine from damage.

Diagnostic Trouble Code 0315 indicates a problem with the rear Oxygen Sensor.

Wrong signals from either front Oxygen Sensor could cause your engine to run lean. This, in turn, could cause pinging, a signal from the Knock Sensor, and retarded timing.

I have no experience with supercharged engines and hesitate to advise you on further diagnosis.

 

Can you recommend a good source for replacing your O2 sensor, like maybe BOSCH or some other 3rd party?? I gather going to Nissan I'll pay a premium for the name. Thanks.

DW



If your timing is being retarded, that is being done by the Engine Control Module (the computer) in response to a signal from the Knock Sensor. The ECM is doing you a favor, protecting your engine from damage.

Diagnostic Trouble Code 0315 indicates a problem with the rear Oxygen Sensor.

Wrong signals from either front Oxygen Sensor could cause your engine to run lean. This, in turn, could cause pinging, a signal from the Knock Sensor, and retarded timing.

I have no experience with supercharged engines and hesitate to advise you on further diagnosis.

[/QUOTE]

 

I guess I should have mentioned that I have a 98 SE cali spec, with O2s all over the place (3 I believe)

DW

[/QUOTE]

 

Yes, you have three Oxygen Sensors. I believe all '95-up US market Maximas are OBD-2 compliant and have three sensors.

Some Nissan technicians argue forcefully for using only Nissan factory sensors. I've always had good results from name-brand aftermarket parts.

I've read that Oxygen Sensors sometimes fail due to a crust which builds up on the outside of the sensing element (the part that's exposed to exhaust gases). Supposedly you can rejuvenate a sensor by removing it, clamping it in a vise, and heating the tip red hot. This burns away the deposits and restores the sensor for further service. I've never tried this trick myself. If you have decided that a sensor is already dead, and you are ready to trash it, this experiment might be worth a try.