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Old 07-20-2014, 03:52 PM
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New truck issues showing up

Hi I am about at my wits end with a new to me truck. It is 1999 f250 with 156000 miles. My current issues are that when it idles it sounds as though it is a big block cam. My ford mechanic thinks it has bigger injectors in it. Does this sound right? Also when it shifts down from overdrive it will slam into gear causing a jerk. I was wondering if all of this is due to not being properly tuned with a chip.
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Old 07-20-2014, 04:01 PM
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Well if you have aftermarket injectors and not a tune, yes it will cause all kinds of problems like this. Best thing to do is pull them and send them to a place like Rosewood to get tested fully and check your UVCH wires when you pull the valve covers for any corrosion. Any codes being thrown? You need a good scanner like AutoEnginuity or something similar.
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Old 07-20-2014, 04:21 PM
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I was told it has new uvch and they replaced the injector orings. It isn't throwing any codes. I finally got the eot sensor fixed and ebpv sensor and tube. It is almost as if it runs cold. It will idle at 900 rpm when I am stopped at stop sign.
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Old 07-20-2014, 04:51 PM
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I would check the icp and ipr next and have it scanned for any codes from Ford or a good scanner. If all that checks out then I'd be pulling the injectors
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Old 07-20-2014, 05:02 PM
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Icp is brand new and no codes after it was put in at ford except for the eot sensor which I fixed with a sensor and pigtail. I am wondering if I would be money ahead to just get new injectors. I am on the fence about keeping the truck since it needs body work from rust issues. Nothing like living in north east Indiana
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Old 07-20-2014, 05:05 PM
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I'd send out injectors to Rosewood
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Old 07-20-2014, 05:16 PM
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If the truck has been maintained decently you got plenty life left in those injectors. Really need a good scan tool. Your accelerator pedal position switch could be acting up causing a high idle. Idk about other injector builders but mine have 160/30 etched on the injector hold down. Even than if they were anything other than stock I'd probably still send them all off to a reputable builder and have them gone through for peace of mind.
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Old 07-20-2014, 05:44 PM
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How do u like your 160/30? Much better than stock?
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Old 07-20-2014, 05:59 PM
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Yea they're definitely better than stock. I'm still running stock turbo and wheel and there is a little lag. If I give it to much throttle leaving a stop and making a turn it will break loose as soon as the turbo lights lol. Not sure how far I could spin them as I haven't cared to try. Should be rebuilding turbo and installing a ww2 this coming weekend as well as a few other things while the turbo is out. Once all that is done I'll probably be taking it up to PHP for a dyno run and see what she throws down.
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Old 07-20-2014, 06:04 PM
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I want some new injectors so bad but I think if I go 160/30 I'll want larger
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