Msp problems.

[Bluemica3.5]

Just starting getting a multi misfire code. And I replaced the plugs. Still coming up

At idle. My vac is reading at 20-22 which its always been at. And as soon as I start to boost it hits 0 and all hell breaks loose starts jerking around and running very bad. Can't seem to figue it out. Any ideas what this could be.

 

[bwalt]

Are the two plug wires from the coil packs snapped onto the spark plugs? It can be a b**** sometimes and I've had them look like they're on but they weren't. Soon as you hit 0 everything takes a s***. Might not be it but it's a starting point..

 

[Jo060]

How old are your coils?
Bad WGA?

 

[Bluemica3.5]

I have had the car 4 years. Never changed coil packs just the two end wires I have a brand new waste gate I might just put it on to see

 

[speedin]

I am thinking wastegate or maybe a coupler/connection for your intake system. you can check the wastegate by blowing into the vaccuum line that goes into the wastegate.

 

[Jo060]

I am thinking wastegate or maybe a coupler/connection for your intake system. you can check the wastegate by blowing into the vaccuum line that goes into the wastegate.

^^ This
No sense in replacing a part if it's not needed. Start small first check your WG and couplers like said above, check plug gaps, clean MAF, try changing coil packs.

 

[Bluemica3.5]

Ok my mechanic is doing a smoke test tomorrow so hopefully something will show up.

 

[hornsfan10609]

I am leaning towards coil packs or the boots on the bottom of the coil pack. Did you correctly gap the new plugs you installed?

 

[thuzil]

It is probably coil packs or spark plug wire connections.

 

[Bluemica3.5]

Well wasn't able to get in to the shop. But now my car is running great. Building boost like it should. Still going to replace the coil packs and plug ends.