Jumps at normal speed driving,

loveMy850 · Post by **loveMy850** » 03 Aug 2017, 16:33

While driving on the road seems to jump periodically could it be a vacuum leak

Post by **FLXC90** » 03 Aug 2017, 16:50

Not the normal manifestation of a vacuum leak. More likely a fuel pressure or spark thing. How old are your plugs, wires, cap, rotor.
Any problems with starting? longer to crank than before? When was your filter last changed? Gas from a different station than usual?

And before anyone else says it. Unless you recently stage zeroed your car, you will find vacuum leaks, but this doesn't sound like that.

Post by **bmdubya1198** » 03 Aug 2017, 21:17

When you say jump, do you mean the RPMs jump up, or the car "bucks?" It could be many different things.
Definitely check your plugs and the rest of the ignition system as well as replace your fuel filter if it hasn't been done in a long while, like FLXC90 said.
My car tends to have a little stutter while cruising every now and again. I don't know what it is, but the only thing I can maybe attribute it to is a possible evap leak.

Post by **erikv11** » 03 Aug 2017, 23:45

Is the Check Engine light on?

loveMy850 · Post by **loveMy850** » 04 Aug 2017, 11:55

Hey guys Thanks and after posting I went along my way and thought man that's a plug not firing,!, Duh! Agree, and I believe my wires are still good, I got some at the JY,buck a piece,look brand new, I have to put them on my meter, i have new Volvo plugs,new rotor, new cap, been too hot in the high desert to work on her, Dang I got to get around to doing this tune-up, Thanks. Again guys, you're the best!