MPLSrx7

so my car usually runs good when its about 55 or below. which is rare, so usually my car is running shitty. it just feels like it lost all of its power and idles really rough, and if i rev up the car high enough i will get a big backfire.

so far i have changed the spark plugs, wires, and got the fuel injectors cleaned. i also made one of those diagnostic lights that flashes and gives you a error code. it came back with no errors.

i was thinking about just taking it to mazda and telling them to figure it out so i know what part to get. i am kinda frustraded here. makes the car really not fun to drive. i am guessing it has to be a sensor???

what do you guys think?

thanks.

NZConvertible

Sounds a lot like a vac leak.

MPLSrx7

do you think the lines are expensive to replace?

Funkspectrum

iTrader: (5)

vac lines shouldn't be too much $$ if you just get the regular black kind...

when you replace them, make sure you do them one at a time....

I'd replace gaskets too...just in case...

MPLSrx7

sorry i have never done vac lines before. i just took a look at them and it looks like it is going to be impossible to reach some of them. is there a write up anywhere?

MPLSrx7

sorry dont mean to **** anyone by bumping this. but how hard is it to put new vac lines and gaskets in?

HAILERS

Shouldn't be difficult at all. For the vac lines on the plastic nipples such as the solenoids, you should use a razor blade to cut them length wise at the ends to aid in pulling them off. If they've been on there for years and you try to just twist/pull them off, you stand a good chance of breaking the plastic nipple. If you cut the vac line at its end where it attaches to the plastic nipple you lessen the chance of breaking the plastic nipple.

Personally I'd buy a couple of cans of starter fluid and with the engine hot and idling as best it can, spray around the engine bay where the vacuum lines are and listen for the engines tone to change. If it changes tone/rpm, then you found a leak. Just fix that area for now.

MPLSrx7

ok i never knew thats how you look for a leak.