check engine light goes on and off - Ford Powerstroke Diesel Forum
 
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post #1 of 5 Old 05-13-2019, 01:39 PM Thread Starter
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check engine light goes on and off

Hi Y'all
I have a 99 ford 250 powerstroke 7.3 l diesel . I have had an issue the past week. First time i was driving and noted a lack of acceleration and rpm and the check engine light came on. Sounded and felt like an injector(s) was not working. Pulled off the road checked under the hood for anything- nothing obvious - so drove again trying to limp home. Engine got warm and check engine light went off and acceleration and injector started working. Has happened whenever i drive- same sequence except the acceleration is better as i turned my HP up with my chip(installed earlier). I replaced the CPS - minimal if any help. I had already replaced the ICP when i replaced the head 1000 miles ago(another story). I am looking for any help on this problem- which is intermittent and seems to be related to engine temperature at least coincidentally. I have looked at the UVCH and seems tight- but have not taken off the valve cover as yet to make sure.
thanks for any help
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post #2 of 5 Old 05-13-2019, 07:20 PM
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check engine light goes on and off

Have a buzz test done to see if every injector is connected and gives a healthy buzz sound. It sounds like you have a sticking injector that frees up when the oil warms up


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post #3 of 5 Old 05-14-2019, 06:25 AM
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You're just going to continue to take "Shots-in-the-Dark" until you read what code it setting that light (sensors are too expensive to guess with...)

If you're gonna keep & maintain the truck yourself I strongly suggest you get access to the special scanner software you need to do it.

Here you have a couple of the most common choices;

1) If you want to do Everything you'll ever need to, then look at the AutoEnginuity + the Ford Enhanced Package (@ $350 - you add an old computer of some sort to run it with)

2) To retrieve most of the codes you'll need to help and even do some testing look at the FORscan Lite (you add an Android device and Blue Tooth Adapter for @ $30) OR the Windoze version with a USB adapter. I like this one for BT Android -> http://www.amazon.com/BAFX-Products-...dp/B005NLQAHS/

Just a few years ago you needed to buy a professional scan tool because our trucks need to have a scanner with a Library containing both the Ford Proprietary AND the Diesel Specific codes in it. Add to that, our trucks are Not, specifically, OBD-II so the Generic scanners the Auto Parts Stores have are of little use to us. But today there are some very good App based tools, that are close to what the pro tools do, for fraction of the cost.


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post #4 of 5 Old 05-15-2019, 09:17 AM
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I have no engine light and worse I bought the OBD11 code reader and it says not connected to the ECU. I dont know how to go forward. I pulled fuse block, all leads, checked all grounds, I dont know from here. It literally makes me sick to think of Ford fixing. With no codes it's a open wallet for them
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post #5 of 5 Old 05-15-2019, 09:24 AM
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If you had no codes, no gauges , cranks but doesnt start. Where would you start? What order would you do it in,? Keep in mind it ran fine a couple days ago and always had. I am certain it's a relay but which relay. The Ford garage would only tell me I had 2 fuse boxes and check them for obd11 fuse. Ughh there is only one fuse box. Of course I would have checked fuses. Really you want to turn over your beloved truck to someone like that. At $95 an hour. Never. If the goddamn truck never runs again, it will not go to Ford garage in this town.
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