Why replace the expensive parts first wild guessing for that cash , laid out.$$$$ one could find a ASE shop and ask for diagnosis only and win.? the engine is misfiring,there are 50+ causes of that.! a fact.... you must be rich, no? , guessing like that, and cherry picking the most $$$$$ parts? took a bath in fuel and all... .wow.
why not tuneup first, like spark plugs (ever get a full tuneup this decade? no engine stated, ? must we guess that? did you check compression on engine first, to reduce that 50+ list to way less, seems not. (a $20 tool in fact) there are in fact 1 to 10 simple tests, (all take tools and gauges) that will in fact find true cause. for way less cash and work and labor.
why less. Engines: 2003-2008 LL8 4.2 L (256 in³) I6 2003-2004 5300 5.3 L (323 in³) V8 (seems not but.....?) 2005-2007 5300 5.3 L (323 in³) V8 with Displacement on Demand
looks like you have the 1st or the 3rd that third one add 25 more causes, due (VDE tech)
here are some steps. bad fuel eliminated. tested .... ask.
1: check all fuses first. 2: scan it, you can not fix modern cars with out a $100 scan too. sorry, its not going to happen. ever. unless blessed with the luck of the Irish.....(WETM) 3:do engine compression per method stated in FSM, the #3 engines, may take special steps, warning you I am....! 4: new spark plugs, filters.... bla bla bla..... 100 years long.... 5: engine vacuum steady at idle? its misfiring so.... 6: no DTC errors from PCM,. NO P03xx errors, or others?????? 7: fuel pressure in spec,not too high and flooding engine? 8: FPR check. same tools as below, fuel pressure gage $20 9: injector leakdown test done? (oh my, it leaks) 10: injector balance test done, just after 8 and 9.??????????? oh dang, one is clogged. 11: check for one dead cylinder yet? IR gun pointed to exh, tube , one runs cold? or unplug 1 injector and engine runs the same rpm or kill spark 1 by 1 see if all drop rpm same.? ok ,if not, not.
12 and more. lots more, but your ASE shop guy knows all this. he will not guess, and will fix it fast for least price. guessing and costs $3000 or more.
not only that , doing diagnosis , lowers down time. and tiny wallet syndroms. and grief. and one some OLDER cars, we go, send it to the wrecker, its not worth that.! all from simple diagnosis.
Answers & Comments
Why replace the expensive parts first wild guessing
for that cash , laid out.$$$$
one could find a ASE shop and ask for diagnosis only
and win.?
the engine is misfiring,there are 50+ causes of that.! a fact....
you must be rich, no? , guessing like that, and cherry picking the most $$$$$ parts? took a bath in fuel and all... .wow.
why not tuneup first, like spark plugs (ever get a full tuneup this decade?
no engine stated, ? must we guess that?
did you check compression on engine first, to reduce that 50+
list to way less, seems not. (a $20 tool in fact)
there are in fact 1 to 10 simple tests, (all take tools and gauges)
that will in fact find true cause.
for way less cash and work and labor.
why less.
Engines:
2003-2008 LL8 4.2 L (256 in³) I6
2003-2004 5300 5.3 L (323 in³) V8 (seems not but.....?)
2005-2007 5300 5.3 L (323 in³) V8 with Displacement on Demand
looks like you have the 1st or the 3rd
that third one add 25 more causes, due (VDE tech)
here are some steps.
bad fuel eliminated. tested .... ask.
1: check all fuses first.
2: scan it, you can not fix modern cars with out a $100 scan too.
sorry, its not going to happen. ever.
unless blessed with the luck of the Irish.....(WETM)
3:do engine compression per method stated in FSM, the #3 engines, may take special steps, warning you I am....!
4: new spark plugs, filters.... bla bla bla..... 100 years long....
5: engine vacuum steady at idle? its misfiring so....
6: no DTC errors from PCM,. NO P03xx errors, or others??????
7: fuel pressure in spec,not too high and flooding engine?
8: FPR check. same tools as below, fuel pressure gage $20
9: injector leakdown test done? (oh my, it leaks)
10: injector balance test done, just after 8 and 9.???????????
oh dang, one is clogged.
11: check for one dead cylinder yet? IR gun pointed to exh, tube , one runs cold? or unplug 1 injector and engine runs the same rpm
or kill spark 1 by 1 see if all drop rpm same.? ok ,if not, not.
12 and more. lots more, but your ASE shop guy knows all this.
he will not guess, and will fix it fast for least price.
guessing and costs $3000 or more.
not only that , doing diagnosis , lowers
down time.
and tiny wallet syndroms.
and grief.
and one some OLDER cars, we go, send it to the wrecker, its not worth that.!
all from simple diagnosis.