Remove all Emissions
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New User
Joined: Jun 2003
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From: USA
Remove all Emissions
I just rebuilt my I300 4.9Ltr. It's an 87 with the EFI on it. As I was diassembling the engine for the machine shop and the emissions stuff was stuck to the head. I was finally able to remove it.
My question is this. I priced all the emissions crap for the parts that screw into the head and it's priced stupid. I don't want to reinstall the stuff so other than blocking the ports on the head. What else do I need to do to ensure the engine runs correctly and no smog stuff is on it?
Thanks
My question is this. I priced all the emissions crap for the parts that screw into the head and it's priced stupid. I don't want to reinstall the stuff so other than blocking the ports on the head. What else do I need to do to ensure the engine runs correctly and no smog stuff is on it?
Thanks
Senior User
Joined: Feb 2004
Posts: 219
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From: Chicago
You should be able to just plug up the ports on the intake and just run with it. Im sure the check engine light would come on with the stock computer program but nothing that a little electrical tape won't fix.
I think that the crank case vent system would be worth keep IMO. Most people would conside it to be smog equipment.
I think that the crank case vent system would be worth keep IMO. Most people would conside it to be smog equipment.
Senior User
Joined: Jan 2004
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From: The KeyStone State
You should keep the EGR valve.
It helps reduce pinging under severe engine load.
By allowing unburnt exhaust gases back into the combustion chamber, it cools the combustion process.
The EGR has little or no effect on drivability.
The EGR system is inactive during full throttle operation. Thus it will not impede on maximum power output.
The Air pump and its associated "injection" system can be fully removed as long as the CATs are removed completely.
It helps reduce pinging under severe engine load.
By allowing unburnt exhaust gases back into the combustion chamber, it cools the combustion process.
The EGR has little or no effect on drivability.
The EGR system is inactive during full throttle operation. Thus it will not impede on maximum power output.
The Air pump and its associated "injection" system can be fully removed as long as the CATs are removed completely.
Senior User
Joined: Feb 2004
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From: Northwest
um..... severe engine load ? I think full throttle lands under that heading ?
In Theory Yakk is correct.... but this is the real world.
Lot's of people will say that blocking off the EGR "might" increase the chance of pinging....... I have never encountered pinging as a result of disconnecting the EGR on any vehicle I have owned.
I am all for clean air........ however FORD EGR systems (sensors or the valve itself) eventually will stop working correctly resulting in poor drivablility.
In Theory Yakk is correct.... but this is the real world.
Lot's of people will say that blocking off the EGR "might" increase the chance of pinging....... I have never encountered pinging as a result of disconnecting the EGR on any vehicle I have owned.
I am all for clean air........ however FORD EGR systems (sensors or the valve itself) eventually will stop working correctly resulting in poor drivablility.
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From: USA
How do you block off the EGR Valve?
So how do you block off the EGR valve? Is their a cover you can get that blocks the ports on the EFI?
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From: Wesley Chapel, FLA
Keep the PCV (Positive Crankcase Ventilation), you need it unless you prefer having a mucked up crankcase and rockers. People do seem to consider the PCV system smog equipment but it's not really. It's to ventilate your crankcase. The air drawn through the crankcase gets burned, kind of as a bonus, since the most convenient place to get vacuum is at the manifold. The system uses engine vacuum to make it work, not so it can burn what is going in. It is doing double duty but the first and most important thing is keeping the inside of your engine cleaner and drier. That's what it was designed to do, not smog control.
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Senior User
Joined: Jan 2004
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From: The KeyStone State
um..... severe engine load ? I think full throttle lands under that heading ?
The EGR system is inactive during full throttle operation. Thus it will not impede on maximum power output.
edit: unburnt should have been burnt.
Elder User
Joined: Sep 2003
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You should NEVER remove the air pump from any vehicle that has a catalytic converter. You will get a clogged up cat, severe overheating of same, and a fire hazard.
Too many people view emission equipment as something you can just yank off and the engine will run better. This may have been the case in the 1970s, but it's not any more. All these systems are integrated, the computer is programmed to expect them, and removing them can often cause the engine to run worse.
PCV is necessary. It's not smog equipment. It's a needed system to ventilate the crankcase and remove blowby products.
EGR hurts nothing, and removing it won't make the engine run better. The EFI system is designed to expect it to be there, as is the computer. Removing it will increase the amount of O2 in the exhaust, and the computer will react accordingly.
Too many people view emission equipment as something you can just yank off and the engine will run better. This may have been the case in the 1970s, but it's not any more. All these systems are integrated, the computer is programmed to expect them, and removing them can often cause the engine to run worse.
PCV is necessary. It's not smog equipment. It's a needed system to ventilate the crankcase and remove blowby products.
EGR hurts nothing, and removing it won't make the engine run better. The EFI system is designed to expect it to be there, as is the computer. Removing it will increase the amount of O2 in the exhaust, and the computer will react accordingly.
Postmaster
Joined: Apr 2003
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From: Virginia Beach
Personally never heard an engine "ping", but its supposed to be dangerous. Um, I think a more recognized term would be engine knock. When your compression is too high (or running really lean) your cylinder will detonate before the spark goes off and the 2 resulting flame walls will smack together cuasing a ping/knock which also puts extreme pressure on the related piston and components, and the extreme heat generated will burn up your pistons (now I have seen burned pistons. Ever seen craters on the moon?). Ok, I'm pretty sure thats what it is, anyone wanna comment? 