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Old 03-13-2010, 11:31 AM   #11
Schrade
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Join Date: May 2005
Location: Snow Hill, North Carolina
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Re: 1998 Chevy Blazer 4.3 p0306

Quote:
Originally Posted by old_master View Post
Check fuel pressure and leakdown first, that will tell if there is a problem with fuel delivery to the injectors. If a poppet valve or injector is stuck open, restricted, or not functioning properly, further testing will be nesessary.
OP: this is information that you NEED to know FIRST AND FOREMOST, if there's ANY tune problem. Watch the FP gauge when you turn the key, and if it goes right to max, the filter has no restrictions. Then you know the pump, filter, injectors, FPR, lines are all good - killing 5 birds with one test, 2 turtle doves, and a partridge in a pear tree uh huh.

Probably ought to swap out the air freshener too, just to know it's a good one.








(j/k about the freshener)


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