EGR Restrictor Update
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EGR Restrictor Update
[updated:LAST EDITED ON 06-Dec-02 AT 01:25 AM (EST)]I finally got around to getting an EGR Restrictor Plate built. Used some brass and drilled the recommended 1/8inch hole for the more restricted passage. I also threw in a new ECT not because I was getting codes but because there is 156Kmiles on the engine. I also decided to run my 33x10.5inch AT's at 42PSI in the rear and 45 in the front.
Well, after a full fillup and mostly city/some Hwy driving the results are in...
1.Way better performance when warm, off idle.
2.No more hesitation.
3.Fuel Consumption has been averaging 13.5 for the past while, with the last fillup going down to 11.8. With the mods above I hit 16.5...very respectable.
Now If I can just chase down that intermittent exhaustleak sound(I hope it is an exhaust leak) when the engine is under load...
WHaynes
93 F150 4.9 4x4
4in ProComp StII
4.10's w/TrueTrac's
33x10.5 BFG AT's
Well, after a full fillup and mostly city/some Hwy driving the results are in...
1.Way better performance when warm, off idle.
2.No more hesitation.
3.Fuel Consumption has been averaging 13.5 for the past while, with the last fillup going down to 11.8. With the mods above I hit 16.5...very respectable.
Now If I can just chase down that intermittent exhaustleak sound(I hope it is an exhaust leak) when the engine is under load...
WHaynes
93 F150 4.9 4x4
4in ProComp StII
4.10's w/TrueTrac's
33x10.5 BFG AT's
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Senior User
Joined: Feb 2000
Posts: 175
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EGR Restrictor Update
If you do a search on this site for EGR Restrictor, you will find tons of information but in a nutshell: For Late 80's early 90's EEC controlled trucks, with age they become less efficient and cannot effectively run with the normal EGR ratio that was configured when the truck was new. To get around the problem people have been using everything from pie plates to stainless steel plates to make a resctrictor that gets installed between the Intake manifold and the EGR Valve. A smaller than stock hole is drilled to allow a minimal amount of EGR to make sure the vehicle will pass emissions tests. Some people however block it off entirely. It is a pretty easy install. You need to buy a coulple of EGR gaskets for your application, and use them as a template to shape the metal you choose. Then drill a couple of holes, install and voila. You should reset your PCM but the computer should relearn after some driving anyway.
WHaynes
93 F150 4.9 4x4
4in ProComp StII
4.10's w/TrueTrac's
33x10.5 BFG AT's
WHaynes
93 F150 4.9 4x4
4in ProComp StII
4.10's w/TrueTrac's
33x10.5 BFG AT's
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