EGR blanking plates

BarriKuda · Apr 10, 2023

Hi folks, couple of questions if someone can riddle me this, I have an F2 HSE 2008 I don’t have a manual to consult, when using heater control I set the recirculating to manual and after a while it reverts to auto, is it meant to do that or is it a fault, I turn it on to manual again and it stays on manual for a while and then goes back to auto, second question…. Has anyone fitted an EGR blanking plate, I’ve watched some YouTube videos and I’m thinking about fitting one, haven’t heard any bad press about them and everything seems to be a positive, has anyone got any experience with these, also are they legal to fit, is it an MOT failure if fitted therefore has to be removed before MOT, any reports good or bad would be greatly appreciated, ta!

Nodge68 · Apr 10, 2023

The HSE has a humidity sensor and air quality sensor as part of the HVAC system. When the humidity or CO2 gets above a set level, the system automatically draws fresh air in to reduce it. It's best to have the system on fresh air in, as this is best for driver alertness.
The HVAC defaults to fresh air in for this reason.

An EGR blank can be fitted, but there are a couple of side effects.
First off the engine takes much longer to get to running temperature, as heat from the exhaust gasses warms the coolant faster as its passing through the EGR cooler. Blanking the EGR prevents this heating, so it takes ages to get up to running temperature in cold weather, which massively reduces MPG on short winter journeys.
Also MPG is reduced when up to temperature at cruising speeds as the engine draws more fresh oxygen rich air, so needs more fuel to maintain the engine running at the stoichiometric ratio.
Also if it has a DPF, blanking the EGR often puts the MIL on, which is an MOT fail.

BarriKuda · Apr 11, 2023

Nodge68 said:
The HSE has a humidity sensor and air quality sensor as part of the HVAC system. When the humidity or CO2 gets above a set level, the system automatically draws fresh air in to reduce it. It's best to have the system on fresh air in, as this is best for driver alertness.
The HVAC defaults to fresh air in for this reason.

An EGR blank can be fitted, but there are a couple of side effects.
First off the engine takes much longer to get to running temperature, as heat from the exhaust gasses warms the coolant faster as its passing through the EGR cooler. Blanking the EGR prevents this heating, so it takes ages to get up to running temperature in cold weather, which massively reduces MPG on short winter journeys.
Also MPG is reduced when up to temperature at cruising speeds as the engine draws more fresh oxygen rich air, so needs more fuel to maintain the engine running at the stoichiometric ratio.
Also if it has a DPF, blanking the EGR often puts the MIL on, which is an MOT fail.

Thanks mate, I thought the heater control was an automatic thing but just wanted to be sure and thanks again for the egr tips, much appreciated

EGR blanking plates

BarriKuda

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Nodge68

Well-Known Member

BarriKuda

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