EGR Delete Tune
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EGR Delete Tune
Can you get a tuner and turn off your EGR and still accomplish the same effects of an EGR delete without having to worry about passing an inspection? With a tune, you can turn it on and off.
Hotshot
Joined: Aug 2006
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From: Whittier, CA
In a few more words, maybe.
You can get a tune, an unlimited tow tune for example, that turns the EGR off and it will probably modify the transmission shifting a bit, but no power increase. Or you can get a custom tune that literally does nothing but disable the EGR valve and hide the DTC.
Will that pass inspection? It would in California. Depends on how your state inspects. Your valve will still be present in the manifold and plugged in electrically.
Is it as good as an EGR delete? Not quite, because you still have an EGR cooler with coolant flowing through it, and therefore a leak is possible. But the cooler won't be exposed to exhaust temperature gas, and therefore less likely to fail, plus the coolant won't be superheated by the exhaust gas, and therefore less likely to drop out solids which can clog the oil cooler.
So, an EGR tune delete is not as wonderful as an honest delete, but it is still an improvement that is very easy to reverse.
You can get a tune, an unlimited tow tune for example, that turns the EGR off and it will probably modify the transmission shifting a bit, but no power increase. Or you can get a custom tune that literally does nothing but disable the EGR valve and hide the DTC.
Will that pass inspection? It would in California. Depends on how your state inspects. Your valve will still be present in the manifold and plugged in electrically.
Is it as good as an EGR delete? Not quite, because you still have an EGR cooler with coolant flowing through it, and therefore a leak is possible. But the cooler won't be exposed to exhaust temperature gas, and therefore less likely to fail, plus the coolant won't be superheated by the exhaust gas, and therefore less likely to drop out solids which can clog the oil cooler.
So, an EGR tune delete is not as wonderful as an honest delete, but it is still an improvement that is very easy to reverse.
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Can I just disconnect the EGR, thus closing the valve, and get the same affects? I currently am not smelling coolant or anything and have no engine light, just looking to preventattive maintenence.
Hotshot
Joined: Aug 2006
Posts: 17,398
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From: Whittier, CA
That is not recommended. It used to be commonly done. Now we know that your cooling fan may not function properly, and most trucks will show a CEL constantly. The tune is used to eliminate those problems.
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I have an 04, was just looking at my options. Right now I have 4 codes popping up:
PO 299, PO 401, PO 478, PO 488. Would cleaning the EGR valve help alleviate these codes? I can copy the codes definitions if need be, let me know.
PO 299, PO 401, PO 478, PO 488. Would cleaning the EGR valve help alleviate these codes? I can copy the codes definitions if need be, let me know.
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Here you go:
P0299 Turbocharger/Supercharger "A" Underboost Condition D* D
P0401 C* Exhaust Gas Recirculation Flow Insufficient Detected EGR Valve Position does not match desired, limits based on
engine speed / load.
EGR Valve stuck or sticking - EGR Valve Position Sensor Bias - EP
Sensor bias.
P0478 C* Exhaust Pressure Control Valve High Input EP is higher than EP desired by 260 kpa (37.7 PSI) for
greater than 30 seconds.
Faulty EP sensor, VGT control valve slow to respond, Stuck VGT
valve, faulty PCM.
P0488 Exhaust Gas Recirculation Throttle Control Circuit "A" Range/Performance D+ d d D*
P0299 Turbocharger/Supercharger "A" Underboost Condition D* D
P0401 C* Exhaust Gas Recirculation Flow Insufficient Detected EGR Valve Position does not match desired, limits based on
engine speed / load.
EGR Valve stuck or sticking - EGR Valve Position Sensor Bias - EP
Sensor bias.
P0478 C* Exhaust Pressure Control Valve High Input EP is higher than EP desired by 260 kpa (37.7 PSI) for
greater than 30 seconds.
Faulty EP sensor, VGT control valve slow to respond, Stuck VGT
valve, faulty PCM.
P0488 Exhaust Gas Recirculation Throttle Control Circuit "A" Range/Performance D+ d d D*
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How about leaving the EGR valve in, disconnecting the cable and plugging it into another EGR valve that you sit on top of the engine in a plastic bag. Would that leave the EGR valve in the actual engine closed and prevent exhaust gas from flowing, and not get codes or fan issues?
Brian
Brian
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Facetious? Me? Never! 
Adjective:Treating serious issues with deliberately inappropriate humor; flippant.
It was a totally serious question, since I have almost no idea how the EGR system actually works on these things. I thought that if you left the EGR valve in, but closed, the exhaust gas wouldn't flow, and if you left the harness plugged into another EGR valve the ECU would think it was connected properly.
Brian
Adjective:Treating serious issues with deliberately inappropriate humor; flippant.
It was a totally serious question, since I have almost no idea how the EGR system actually works on these things. I thought that if you left the EGR valve in, but closed, the exhaust gas wouldn't flow, and if you left the harness plugged into another EGR valve the ECU would think it was connected properly.
Brian
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
I have used a little motor oil on the EGR valve O-rings. Lately I have been using a high temp copper colored neverseize compound that is made for exhaust and EGR components. Seems to work fine. Just a tiny bit of whatever you use. The only purpose is to make the valve easier to remove next time.