"Stop" Dash warning light

[JoJam]

Yesterday as I started heading up over Mt. Ashland on I-5 Southbound I had a "Stop" light appear on my dash. Scaring the bejesus out of me, that's exactly what I did. I couldn't find an explaination for it either because of stress, or it just wasn't in any of my literature. There wasn't anything wrong according to my instruments and all my fluids were ok. It happened once more on the way to the top before I decided to creep up the hill. The slow crawl seemed to do the trick as I didn't have a problem with it the rest of the way up. Down hill and flat driving, didn't recreate the problem, but under normal driving conditions as I started up a hill and increased throttle pressure the light would come on. That's when I noticed that if I let off on the trottle pressure, the light would go off. I have a 2000 38ft. Monaco Dynasty with the optional 350 Cummins, 6 speed Allison. Can anyone explain what that light relates to and have any of you out there had a simular experience?

[tiffinboy]

JetAonly wrote:

tiffinboy wrote:

JetAonly wrote:
FWIW that year the ISC350 actually has 2 water separators. A Racor S3201T as primary and the FS1022 as secondary which has the WIF light connected to it. Both are 10 micron.

but its not the WIF lite that is coming on?? its the "STOP" engine lite that's activating?

Thats why I suggested that the STOP lamp is from something else wrong and throttle position is a coincidence. Until the codes are read it could be lots of stuff. Stop lamp is lit for this things that will cause catastrophic engine damage. Loss of oil pressure for example, however, there are many others.

thanks for the reply as that's what I was trying to say in my first post

[JetAonly]

tiffinboy wrote:

JetAonly wrote:
FWIW that year the ISC350 actually has 2 water separators. A Racor S3201T as primary and the FS1022 as secondary which has the WIF light connected to it. Both are 10 micron.

but its not the WIF lite that is coming on?? its the "STOP" engine lite that's activating?

Thats why I suggested that the STOP lamp is from something else wrong and throttle position is a coincidence. Until the codes are read it could be lots of stuff. Stop lamp is lit for this things that will cause catastrophic engine damage. Loss of oil pressure for example, however, there are many others.

[krivanj]

Mine was the stop engine light. I had no water in the fuel

[tkcas01]

tiffinboy wrote:

JetAonly wrote:
FWIW that year the ISC350 actually has 2 water separators. A Racor S3201T as primary and the FS1022 as secondary which has the WIF light connected to it. Both are 10 micron.

but its not the WIF lite that is coming on?? its the "STOP" engine lite that's activating?

Good point - I just checked and I too have a "WIF" light in addition to "Stop Engine", so sounds like that is not the culprit here.

[tiffinboy]

JetAonly wrote:
FWIW that year the ISC350 actually has 2 water separators. A Racor S3201T as primary and the FS1022 as secondary which has the WIF light connected to it. Both are 10 micron.

but its not the WIF lite that is coming on?? its the "STOP" engine lite that's activating?

[JetAonly]

FWIW that year the ISC350 actually has 2 water separators. A Racor S3201T as primary and the FS1022 as secondary which has the WIF light connected to it. Both are 10 micron.

[Cbones]

Somebody earlier said install a Scangauge. I couldn't agree more. For about $150 you can put the scangauge in yourself and then you can read any fault codes that crop up anytime you want. For what it costs to have a diagnostic checked once, you can have the scangauge and read it whenever you want. Additionally you have so many gauges that it monitors, you may be able to see something going afoul long before you ever get a check or stop engine light.

[tiffinboy]

BigRabbitMan wrote:

tiffinboy wrote:
If anyone can explain I would sure like to know
My 2002 ISC 350 fuel filter was so dirty I was loosing power on hills and lite never ever came on so iam thinking this was only on some models maybe?

NOTE that it was NOT his fuel filter, but his FUEL/WATER SEPARATOR that sent the signal so his unit was NOT starving for fuel so his power remained. The fuel/water separator is separate from the fuel filters on most rigs. Have you checked your fuel/water separator?

Fuel water seperater as I understand things is a primary fuel filter.I have a fuel filter with a water seperater and a secondary fuel filter.The seperater has a water in fuel warning but certainly not a stop engine warning the way I understand things? 2008 425isl
why I keep questioning the OP issue is that I cant see how or why Cummins would ever want the "stop engine" lite to come on just because the fuel filter was nearing its end of life journey

[Ranger_Reg]

I had a Cat 350 do the same thing. Finally I took it to freightliner and found the problem with the turbo. Mine was only working 80% and when I go up a grade and step on it the light comes on. Mechanic said it will work on flat roads but when you need that extra 20% you will never get it from turbo. Actuator rod will rust and prevent the turbo from working. A friend lubs his turbo rod and never has a problem. Replaced turbo and the engine has a lot more zip, no more lights.

[tkcas01]

BigRabbitMan wrote:

tiffinboy wrote:
If anyone can explain I would sure like to know
My 2002 ISC 350 fuel filter was so dirty I was loosing power on hills and lite never ever came on so iam thinking this was only on some models maybe?

NOTE that it was NOT his fuel filter, but his FUEL/WATER SEPARATOR that sent the signal so his unit was NOT starving for fuel so his power remained. The fuel/water separator is separate from the fuel filters on most rigs. Have you checked your fuel/water separator?

On my rig, it actually has two fuel/water separators - one in a bay just behind the rear wheel - the Fleetguard FS1242. Note it has a clear plastic bowl on the bottom where you can easily check for water in the fuel.

On the engine is the Fleetguard FS1022. It has a sensor in it that you hook a wire to. The sensor is a "water in fuel (WIF)" sensor, so if that was indeed what was triggering the indicator light it would say he was getting plenty of fuel, but also some unwanted water. So, the OP may not be out of the woods yet depending on whether there is still water in the tank.

[wolfe10]

We may be getting into semantics here.

I and many others do call the fuel water separator (first one from the tank on a regular two filter system) the primary fuel filter. It will have a course filter media, generally between 10 and 30 micron element.

The secondary fuel filter is the fine filter with 2-5 micron element.

And, most certainly, a blockage in the primary fuel filter/fuel water separator can limit fuel to the engine and reduce performance. So can blockage in the secondary fuel filter.

[BigRabbitMan]

tiffinboy wrote:
If anyone can explain I would sure like to know
My 2002 ISC 350 fuel filter was so dirty I was loosing power on hills and lite never ever came on so iam thinking this was only on some models maybe?

NOTE that it was NOT his fuel filter, but his FUEL/WATER SEPARATOR that sent the signal so his unit was NOT starving for fuel so his power remained. The fuel/water separator is separate from the fuel filters on most rigs. Have you checked your fuel/water separator?

[krivanj]

Maybe measures the pressure put out by the injector pump... if the filter is getting clogged, the pump would have to work harder, etc.
Your question needs a Cummins tech.

[tiffinboy]

krivanj wrote:
The Cummins guy said it could be fuel starvation, low coolant, maybe something else (it was three years ago, and I do not own the RV anymore.)
I'm pretty sure it was listed in the Cummins ISC engine manual which came with the RV...

Ok if it was fuel starvation one would lose power though? low coolant
is one for sure but u said thing ran normal and u changed fuel filter and lite never came on.I was (am) trying to find out how the ecm knows the filter is getting dirty and is able to activate the stop engine lite.If anyone can explain I would sure like to know
My 2002 ISC 350 fuel filter was so dirty I was loosing power on hills and lite never ever came on so iam thinking this was only on some models maybe?