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Sgreg · 03-02-2007

I would suggest you verify fuel pressure. Z's are very sensitive to lower than normal pressure. Low speed and idle conditions seem to be effected early on and it just gets worse as one or both fuel pumps deteriorate. This is a relatively easy test and does not involve removal of the plenum.

03-02-2007	#12
Sgreg Join Date: Aug 2006 Location: Texas Posts: 518	Re: Did fuel injector cleaner cause problem? I would suggest you verify fuel pressure. Z's are very sensitive to lower than normal pressure. Low speed and idle conditions seem to be effected early on and it just gets worse as one or both fuel pumps deteriorate. This is a relatively easy test and does not involve removal of the plenum.