MBUB707. What happens if you don't tune and turn off the egr?

 

EGR= Exhaust Gas Recirculation

How does the exhaust enter the intake manifold?? Thru the passenger side up-pipe.

Most EGR delete kits will block off the pipe at the EGR cooler or delete the cooler. When the EGR cooler is deleted they usually give you a straight up-pipe replacement. The EGR valve does nothing more than meter the flow of the exhaust as it exits the EGR cooler. With tuning the EGR valve is rendered useless so you can leave it in place (visual inspections) or remove it to use the plate.

Without using tuning most will see a EGR code or CEL that reflects the lack of EGR flow.

 

You will get a CEL on the late04 and up trucks, the 03 and early 04 trucks don't throw a code.

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also the 03 and early 04 /before 9-22-03, don't have the nasty scoop in the up pipe like the later trucks do so the uppipe can be capped off at the connection of the egr cooler and still have no restrictin, on the later trucks they replace the uppipe to remove the restriction.

 

Heavy Assault Says: Without using tuning most will see a EGR code or CEL that reflects the lack of EGR flow.

My question is, Will that make the truck run rough?

 

For your 2004 it has been my experience that will not happen. Long term running could lead to issues so don't wait too long to see the results.

 

it will run fine, even if a code is thrown they are just soft codes to let you know something isn't right. it won't put it into a "safe" mode or anything. I ran for 200k with the egr valve just unplugged and never had an issue.

 

the only reason i removed my egr with a sinister delete kit was i blew a head gasket and warped headers and it backed up oil into my coolant so i replaced all of them and did the oil cooler and water pump while i was down there and replaced coolant chamber but back to the question i feel the only thing that changed in my truck was it runs a little bit hotter than before and i use just a little more coolant in the truck not substantial but i can def tell theres more than before. on my SCT tuner when im watching it was at temp of 189 degrees now im running at 200-210 i was told that was from delete kit.

 

I live in CA and I know I can't do an EGR delete without throwing a soft code stipulating I had to do more driving to have the on board monitoring system finish the tests. It has been some time since I did it but if I remember right it was code P1000. I put a OBDII scan gauge on it and it showed the EGR monitor wasn't being satisfied. It never did clear until I put everything back to stock and it cleared within a few miles of driving. It would have never passed smog since they won't even attempt until the OBDII system doesn't throw any codes. Stuck with stock as long as I live here.

 

with the 03 truck you can unplug the egr valve and leave it till you have to get smog checked again and then plug the valve back in a day or 2 before the test.

 

so i live in cal too. I just replaced my second egr in 60K miles. I want to go with the delete and leave the egr in for visual inspection. My 04 f350 has an engine manufactured in 03, i can see the sticker on the engine. So you think i can pass the obdII portion if i plug the egr back in a couple of days prior to smog check? no soft codes? sorry i meant bobfbigman JR