Thanksgiving trip. Driving rain last hour. Check engine light comes on. VmSpc shows normal temps for engine, tranny and manifold, normal oil pressure. Engine seems ok but pulled into pilot to post this question.
Thanks
VmSpc diagnostics report Engine PID and Engine SPN water in fuel indicator high reading.
If you weren't driving in the rain I would more concerned about the codes. My personal opinion, which everyone has one, would be to keep on trucking as it is probably a wet connector. That is what I personally would do. I would also keep to the right incase it might go into limp mode.
Might be water getting into a plug . If it's running and not decelerated I would wait. That's me though.
Did you just fill up?
No. Filled up at a Pilot about 150_200 miles ago.
Can you visually check your primary filter for water, or drain fuel from bottom of filter to check for presence of water in fuel I am suspicious of bad fuel from bottom of tank at Pilot refuel Also check condition of air filter for water (unlikely) but a review of previous posts will reveal an engine trashed by rain (torrential) ruining air filter and ingested into engine
Primary fuel filter shows no visible water. I'd suspect fuel but had an uneventful 120 mile trip a week ago when it wasn't raining.
How would I check air filter.? That's the big round drum on the lower left of the ISC I think.
Also how do I reset check engine light.
Don't disturb the air filter unless you have a new one to replace it with! If you do take it out, make sure you clean the canister completely.
Maybe someone who knows the VmSpc better can answer that question. Maybe PM Roger.
There should be an air filter restriction gauge in the engine compartment. The end of the air cleaner housing will have a small black plastic line leading up to the gauge. For your Cummins, the max restriction should be 25" (H2O) or 6.2kPa (kiloPascals). Rainy weather may cause the restriction indication to be elevated. If you reset it, it will take full throttle acceleration to bring it back to an accurate reading.
Pierce
How do I reset check engine light?
Might not be able to until dry. I've had them clear by cycling the key many times
Ok. We're back on the road. Check engine light off. Secondary fuel filter wire was Off.
Thanks for posting the resolution to your check engine light issue, I am sure someone down the line will benefit from your follow up. AFIK, the 99' U270 didn't come with a WIF (water in fuel) sensor on the Racor primary filter, even though there may be a sensor on the filter base of the Racor. The secondary filter, a Fleetguard FS1022 that is mounted to the curb side of the engine comes with a WIF sensor and does connect to the Cummins ECM. A bad connection or if that wire is disconnected will throw a check engine light. If there is indeed water that made it to the secondary filter, the primary filter isn't doing its job any more. One note, the Cummins parts guy called the engine mounted filter the primary and OEM supplied filter the secondary. I can kind of see it from his point of view since the engine mount filter is the one supplied by Cummins to the OEM customer. However, it seems that the standard nomenclature is that the primary filter (25 or 30 micron) is the one which is upstream of the lift pump, while the secondary filter (10 micron or less, I haven't been able to confirm the actual micron rating of the Fleetguard FS 1022) is after the lift pump and is the second line of defense for the fuel injection pump, the CAPS pump in the case of our 8.3 ISC. So for our Cummins ISC's at least a check engine light that shows the code for water in fuel, the first and place to look as the cause for that check engine light is the engine mounted secondary filter.
Don
If the condition that causes the check engine light to come on it normally will not go off as late ng as the condition persists. Sometimes shutting the engine off, waiting for a few minutes and then starting again will do it. VMSpc will show you the fault codes but not what to do about it.
Clearing the codes in VMSpc will not turn off the fault. But it does help you isolate problems to look at.
Thanks to all who quickly helped out on a Thanksgiving holiday!
This place is unbelievable!