Service engine light being tripped by EGT?
Hey fellas, I got a question that hopefully someone will have the answer to.
What temperature does EGT have to reach before the service engine soon light comes on? When were driving in the mountains, climbing at high power/ high boost conditions will trip the light after a few seconds. It goes back off after we top the hill and let off. So I figure it must be an EGT triggered situation. The truck is E99, tuned with a DiabloSport predator tuner. Stock turbo, injectors. We've been running it this way for years and never has anything blown up or melted. A couple times we've even had the turbo start glowing cherry red when were towing really hard. |
You can melt your engine block into a puddle before the SES light will come on for EGT. There's no EGT sensor in the truck from the factory so there's nothing for the computer to read and cause it to trip a light.
Usually it's a P1211 that sets the light in those conditions, which is common for a chipped or tuned truck. The light goes off after a few minutes, no harm, no foul. You can look at upgrading the HPOP if it really bothers you, but I'd recommend at least pulling the code first. |
Originally Posted by 351Cleveland C4
(Post 14529302)
A couple times we've even had the turbo start glowing cherry red when were towing really hard.
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Ok cool. I knew it wasn't really something to worry about cuz it still runs great after all these years.
As far as a pyrometer, ehh... if we had one we probably wouldn't push as hard. Haha |
Originally Posted by 351Cleveland C4
(Post 14529302)
Hey fellas, I got a question that hopefully someone will have the answer to.
What temperature does EGT have to reach before the service engine soon light comes on? When were driving in the mountains, climbing at high power/ high boost conditions will trip the light after a few seconds. It goes back off after we top the hill and let off. So I figure it must be an EGT triggered situation. The truck is E99, tuned with a DiabloSport predator tuner. Stock turbo, injectors. We've been running it this way for years and never has anything blown up or melted. A couple times we've even had the turbo start glowing cherry red when were towing really hard. |
My bet is you are getting the "ICP is lower/high than desired" code. I got that one a few times when dragging the camper over the mountains.
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Yep, just like the 2 previous posts said...P1211 code most likely tripping the SES light. HPOP not being able to keep up with the Demand from the program. I had the predator before and you can pull & clear codes like said above. I remember EGT's being fine in the tow programs but she will get very hot (+1250 EGT's) in the higher HP tunes .
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Over boost will also set an ses light that will go out a minute after it's set. Don't remember what code it is though.
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Were just running the 65hp econo tune. Boost will peak out around 24 IIRC.
Will there be a code stored even though the light isn't staying on? |
Originally Posted by 351Cleveland C4
(Post 14530748)
Were just running the 65hp econo tune. Boost will peak out around 24 IIRC.
Will there be a code stored even though the light isn't staying on? |
Originally Posted by 351Cleveland C4
(Post 14529302)
Hey fellas, I got a question that hopefully someone will have the answer to.
What temperature does EGT have to reach before the service engine soon light comes on? When were driving in the mountains, climbing at high power/ high boost conditions will trip the light after a few seconds. It goes back off after we top the hill and let off. So I figure it must be an EGT triggered situation. The truck is E99, tuned with a DiabloSport predator tuner. Stock turbo, injectors. We've been running it this way for years and never has anything blown up or melted. A couple times we've even had the turbo start glowing cherry red when were towing really hard.
Originally Posted by 351Cleveland C4
(Post 14529461)
Ok cool. I knew it wasn't really something to worry about cuz it still runs great after all these years.
As far as a pyrometer, ehh... if we had one we probably wouldn't push as hard. Haha ~Diane |
Originally Posted by Deluxe06
(Post 14530719)
Over boost will also set an ses light that will go out a minute after it's set. Don't remember what code it is though.
10 tons of pure American Freedom! |
I'm not too worried about it. I'd have to find the tuner to read the codes. And I don't remember where it's at haha. Thanks for the info guys.
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