Car stumbles....

[Freeky4]

Well I have had my car for about 2 weeks now and I have noticed that it stumbles. When I am crusing at any speed, and I maintain that speed for about 20-30 sec the car will start to stumble or studder. The RPM's will drop about 50-150 rpms and hold that for a few sec then speed back up. All the while I have not tried to accelerate or slow down.

any ideas?

 

[red90laser]

man im having the same exact problem if i find a fix i will post it. but if you get yours fixed post it in here so i can try it.

 

[xluciferx]

Well I have had my car for about 2 weeks now and I have noticed that it stumbles. When I am crusing at any speed, and I maintain that speed for about 20-30 sec the car will start to stumble or studder. The RPM's will drop about 50-150 rpms and hold that for a few sec then speed back up. All the while I have not tried to accelerate or slow down.

any ideas?

I have the same problem when it starts up, it idles real low like its going to turn off then after a minute it idles fine. Ive spoke to a few mechanics and they say it might be a bad o2 sensor. Im going to replace mine this weekend. I bought a dsmlink and i get a reading that my o2 sensor heater is malfunctioning. And we tested the o2 and it was bad. you can find them anywhere from $90 to $130, look around online, ill reply when i change.

 

[cfisher]

I've got the same problem and I'm also pulling a o2 heater circuit malfunction bank 2. On my logger my 2nd o2 reads 1.24v all the time without changing. My front o2 reads fine. I imagine the no cat is causing this. I'm going to probably do the vfaq mod and override the 2nd o2 sensor instead of buying a new one.