While driving the car,when I get off the throttle the car sounds like it is trying to die,(like it is shutting off and on by the sound) then the other nite I decided to get on it and when I did the check engine light came on but then went off,the car once you let off the gas still sounds like it is shutting off and on looking at the tach you can see the tack moving back and fourth,any suggestions?
Engine running funny ?
- Thread starter My New 8
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RE: Engine running funny ?
since you don’t have any info in your profile.. please give us year, and mileage, and last tune up.
since you don’t have any info in your profile.. please give us year, and mileage, and last tune up.
RE: Engine running funny ?
I would have to suspect the mass air unit to be the culprit here.
If you have our maf kit and you are experienceing a surging deceleration then "clock" the maf's electronics.
Example: If your electronics on the top of the maf kit is in the 12:00 position then loosen the hose clamp to the throttle body rubber and move it to the 1:00 and try that.
Keep clocking until this goes away.
It can get a "funny" read if its not perfect and cause that deceleration characteristic.
Its very rare and unusual but easy to remedy.
I would have to suspect the mass air unit to be the culprit here.
If you have our maf kit and you are experienceing a surging deceleration then "clock" the maf's electronics.
Example: If your electronics on the top of the maf kit is in the 12:00 position then loosen the hose clamp to the throttle body rubber and move it to the 1:00 and try that.
Keep clocking until this goes away.
It can get a "funny" read if its not perfect and cause that deceleration characteristic.
Its very rare and unusual but easy to remedy.
RE: Engine running funny ?
http://www.geocities.com/just280/mynew8.jpg Hey Geno long time no see,It is the MAF I got from you a while back,I haven't changed anything since I put it on the first time,But I will try that to see if that works!
http://www.geocities.com/just280/mynew8.jpg Hey Geno long time no see,It is the MAF I got from you a while back,I haven't changed anything since I put it on the first time,But I will try that to see if that works!
RE: Engine running funny ?
Same thing happened to me on my LMS mass air flow. Geno's idea of moving the sensor worked for me. Still, get the codes checked out. I found another unrelated problem that was setting off codes, and I was ignoring it because I assumed it was mass air.
Brent
http://www.eden.rutgers.edu/~brenth/markviii/Brent's-Mark-VIII.jpg
Same thing happened to me on my LMS mass air flow. Geno's idea of moving the sensor worked for me. Still, get the codes checked out. I found another unrelated problem that was setting off codes, and I was ignoring it because I assumed it was mass air.
Brent
http://www.eden.rutgers.edu/~brenth/markviii/Brent's-Mark-VIII.jpg
RE: Engine running funny ?
http://www.geocities.com/just280/mynew8.jpg Well Can you go into detail on your other problem ? I am going to have it put on a machine this evening that will let me know if anything else needs to be corrected.
http://www.geocities.com/just280/mynew8.jpg Well Can you go into detail on your other problem ? I am going to have it put on a machine this evening that will let me know if anything else needs to be corrected.
RE: Engine running funny ?
Yeah, in NJ they have full service gas stations and some idiot shoved the pump in so hard that they broke the valve and I keep getting evaporative emmissions codes. The point is not to assume that your CE light is mass air flow, always check the codes to be sure.
Brent
http://www.eden.rutgers.edu/~brenth/markviii/Brent's-Mark-VIII.jpg
Yeah, in NJ they have full service gas stations and some idiot shoved the pump in so hard that they broke the valve and I keep getting evaporative emmissions codes. The point is not to assume that your CE light is mass air flow, always check the codes to be sure.
Brent
http://www.eden.rutgers.edu/~brenth/markviii/Brent's-Mark-VIII.jpg
RE: Engine running funny ?
http://www.geocities.com/just280/mynew8.jpg Okay checked the code and it showed crank sensor ? could that cause it to lope when sitting there idling ??
http://www.geocities.com/just280/mynew8.jpg Okay checked the code and it showed crank sensor ? could that cause it to lope when sitting there idling ??
RE: Engine running funny ?
Yes, since the crank sensor is used by the ICM(Ignition Control Module) to monitor engine rpm. Basically, it is an AC generator/proximity sensor sensing the gear teeth of a gear behind the front engine cover. Some issues have been reported with the harness connector to the crank sensor, so you may want to carefully examine that also. Since it is an AC signal with varying frequency any signal loss can be misleading the ICM causing timing issues. After the crank position sensor issue is resolved, clear the codes and check for further DTCs as you may have other ignition issues hidden by the crank sensor code.
Yes, since the crank sensor is used by the ICM(Ignition Control Module) to monitor engine rpm. Basically, it is an AC generator/proximity sensor sensing the gear teeth of a gear behind the front engine cover. Some issues have been reported with the harness connector to the crank sensor, so you may want to carefully examine that also. Since it is an AC signal with varying frequency any signal loss can be misleading the ICM causing timing issues. After the crank position sensor issue is resolved, clear the codes and check for further DTCs as you may have other ignition issues hidden by the crank sensor code.
RE: Engine running funny ?
http://www.geocities.com/just280/mynew8.jpg Well guys found out what it was,had to replace the 02 sensors,and boy were they a pain in the old butt to replace,but got them done and it seems to be doing fine so far,thanks for the help !!!!!!!!!!!!!!!!!
http://www.geocities.com/just280/mynew8.jpg Well guys found out what it was,had to replace the 02 sensors,and boy were they a pain in the old butt to replace,but got them done and it seems to be doing fine so far,thanks for the help !!!!!!!!!!!!!!!!!
RE: Engine running funny ?
http://www.geocities.com/just280/mynew8.jpg Well really I would have rather it had been the MAF cause it would have been easier to have fixed than the 02 sensors,How many here has replaced their own 02 sensors,cause the ones who has knows what a pain they can be !!!!! But in all yes I am glad it was only them instead.
http://www.geocities.com/just280/mynew8.jpg Well really I would have rather it had been the MAF cause it would have been easier to have fixed than the 02 sensors,How many here has replaced their own 02 sensors,cause the ones who has knows what a pain they can be !!!!! But in all yes I am glad it was only them instead.
RE: Engine running funny ?
http://www.geocities.com/just280/mynew8.jpg,well when I pulled the chip out,it cleared the code,then drove it around until a code came back on,put the scanner back on it and it showed the right and left bank 02 sensors,and that was the only code it has showed,replaced both and has not had another code pop up.
http://www.geocities.com/just280/mynew8.jpg,well when I pulled the chip out,it cleared the code,then drove it around until a code came back on,put the scanner back on it and it showed the right and left bank 02 sensors,and that was the only code it has showed,replaced both and has not had another code pop up.
RE: Engine running funny ?
http://www.geocities.com/just280/mynew8.jpg Since I have replaced the 02 sensors do I need to do anything else ????????? any suggestions ? Gas mileage still not like it use to be .
http://www.geocities.com/just280/mynew8.jpg Since I have replaced the 02 sensors do I need to do anything else ????????? any suggestions ? Gas mileage still not like it use to be .