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Stumbling/misfiring only on hills and extended drives..

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Old 07-09-2014, 11:27 AM
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Did you take it to the shop like you were talking about?
Old 07-14-2014, 09:15 AM
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just took it in this morning, ill let ya know what they find.. it did get progressively worse though, now once its warmed up it misfires like crazy at idle and on the street.. i did check the vacuum lines as well, even removed the two vsvs and capped off unnecessary ports per 4crawlers direction, checked egr function as well while i was at it, as soon as i applied suction to the egr the truck died..
Old 07-14-2014, 03:57 PM
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IACV plugged in?
Old 07-15-2014, 12:46 PM
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Shop said everything tested out 100%, full fuel pressure and spark, AFM and tps are good, they're gonna try a TB and injector cleaning.. See if maybe the injectors are clogged.. So well see..
Old 07-15-2014, 03:25 PM
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sounds fuel related. you could try running a wideband to see what the fuel ratio is doing.

Last edited by the171; 07-15-2014 at 03:29 PM.
Old 07-15-2014, 03:26 PM
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That is interesting... Hope that fixes it. Let us know what happens.
Old 07-24-2014, 04:28 PM
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Did you ever get your truck fixed?
Old 08-03-2014, 01:43 AM
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yeah, after replacing a couple more hoses, cleaning tps and afm contacts, and a valve adjustment, which really helped the valve tick i have had forever, it now runs just as it did before.. At idle it still misfires a little bit, doesnt matter what ohm range i set the tps idle sjustment at, high range or low rang, but it has for the past couple years, no idea why, but it doesnt do it during driving anymore which was the main problem.. dunno what the exact issue was cuz i did all that in one afternoon, but it was one of them..
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