Quote:
Originally Posted by ladagobago
We were running down rt81 out of Sryacuse and hit some rough roads which caused the check engine light to come on. After a few miles we got a bunch of alarms and lights but they went out. All looked ok on the gauges except for my voltage which was up to 18 VDC. also my glowshift lift pump pressure was no zero. we dove for a long way to Scranton FL dealer. they said it would be over 5 hours to check the codes.
I decided that since I was there it would be ok to finally shut down the motor and do some test. I have a pigtail hose and ball valve on the output of the final filter just before the V44. Use it to fill the filters at change time and also to get air out of the line afterwards. Had the DW turn on the key to see a dribble then asked her to bump the starter and got a good load of fuel. So I really did have fuel pressure.
When I got back to the seat , I turned on the motor and the check engine light was gone. I told DW that we are going to continue. After that it seems that when we go over these crapass bridge to road transitions we get a check engine light. Also see that a lot of other people have the same problem but there is not defined reason or location. Has anyone else gotten a resolve for this. Seems like a major deficiency in design to me. So are the roads.
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Ugh this is why I hate computer controlled vehicles, but anyway LOL
We have this problem often with my fleet of 7 over the road 18 wheelers, typically it's a grounding issue and isn't easy to find.
Unfortunately problems like this take alot of your time diagnosing if you are the do it your self type or alot of a mechanics time that you are paying for.
If it's not a critical code that will derate you could just deal with it, isn't like a check engine light means the engine will blow up in 2.8 seconds.
You may want to buy a scan tool, at least then you narrow down the sensor that is messing up and check it out wires associated with it.
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