[basim006]

Hey fellow gearheads.....

Im new to the forums, I own a 2003 Mazda 6I auto transmission and i need help!!! My CEL is on and my car will start, but the engine will rev erratically and sometimes stall but start back up...then after about 3 mins, it will idle somewhat smooth. When i put the car in drive and start going, sometimes it will buck a little then run fine. Then while im driving its fine, but when i decelerate and ease up on the gas a bit, the RPM needle drops to 0 and the motor loses power, then kicks back on. I ran the OBDII diagnostic and it pulled a P0340, P0300, P2177 and P2178 codes. I replaced the camshaft position sensor due to the P0340 code, but there is no difference at all. What could be doing this? I really dont want to get raped in labor fees...

 

[flipper66]

I would guess it is a vac leak.

based on on your running condition, P300(multiple missfire), the p2177/78 codes, and the fact that the car stalls out.

 

[basim006]

ok. originally i thought the cam sensor was causing the misfires and lean condition, but i guess i can eliminate the cam sensor problem and look somewhere else. Is propane the best way to check leaks? and lastly, how do u guys remove a hose thats really stuck on there after you remove the clip? some of my hoses seem like they will just not budge to come off the connector haha.

 

[Oppa]

a little wd40 works for me

 

[flipper66]

If I can't muscle it off....... I cut it. no sense in breaking something extra expensive(water pump fittings, intake plenum, ect) for something I can replace with a hose joiner and/or replacement piece of hose.

dried out hoses could very well be where the vac leak is coming from.

 

[basim006]

do you know of anything that could give out a false camshaft sensor reading? would a vacuum leak do that?

 

[evilmatchbox]

my car is having the exact same problem started about a week ago. I am getting the camshaft senor fault aswell