idle miss and boost surge

[mtnbktrek]

Hi i have a 03 GT with 40K. I have a miss at idle on the #4 cyl. onlywhen it idles and while im driving the turbo is putting out like 8-10 #'s and all of a sudden shoot up to around 20#'s for a second and go back to norm. the car sat for 2 weeks and when i went to work on the miss (check plugs)the #3cyl. plug was wet with gas. Could a leaky inj. on #3 make #4 miss?other than that the plugs were fine.the wires are 8months old (8.5mm)new wires are coming in tomarow morn. Back to the boost surge could that be the BOV? i heard there is a rubber valve that sometimes tears.has anyone heard of this?

[quicksilverdon]

I doubt a problem in # 3 could cause #4 to miss...
What I always do is swap wires between 2 cylinders to see if problem stays or moves....
The majority of missing problems are plug wires - the PT eats them (I think Crane wires last longest), but I have read of intake gasket leaks - the test is to spray WD40 along the intake runners when the car is idling - if it smooths out, you've got a bad intake gasket...

[mtnbktrek]

i put new wires on and it did the same thing so i switched the firing order (waste spark)to check the coil and i checked the resistance in the primary which was good. i will try the wd-40 when i get out of work tomarrow. I got that plastic intake man. and will be putting that on when i get the stage 1 which should've been here a week ago.

[quicksilverdon]

Coils on the PT hardly ever go bad - and when they do, they take out 2 cylinders...
You getting any error codes (P304 only?).
If you're going to do the new manifold, look carefully at the gaskets - specially around 3-4. On another PT forum, couple guys had problems similar to yours and that's what they found (Intake gasket bad)[:I]

[mtnbktrek]

Ok i tried the spray on the intake and it didnt do anything.i talked to a tech. at motorworld chrysler told him what i tried he is stumped. he said mayb it is the #3 inj. and the #4 is not getting the corect psi at idle. t just started to get cold here and it sucks workin on cars i gotta get a new heater for the garage.

[mtnbktrek]

hey man hats off to you i just got back from the dealer. it was intake man. gasket its under powertrain warranty so i guess i missed the spot or didnt spray enough when i sprayed it. thanks

[quicksilverdon]

Thanks for getting back with the cure - that's the only way I learn is when the problem is fixed. [?]
Under warranty is good!

[bobs turbo pt]

glad its fixed !!