I'm a know nothing aspiring gearhead that bought a project ranger. I'm currently swapping in a reman motor and wanted to delete my egr. Everyone is saying don't do this it can cause detonation, blahblahblah. But exactly how different are the motors for a manual vs an automatic transmission? Seems like an odd question but according to my service manual the 1993 2.3 l came with egr on the manual transmission and not on the automatic. If there is no difference in the engines, why aren't all the automatic transmission rangers from this year blown up or pinging?
Depends on where the vehicle was originally sold I believe as to the type of emissions stuff on them. If you got the same truck in California it would have also had a SMOG pump on it as well as the EGR system. I don't think it has anything to do with manual VS automatic transmission, the system would be the same regardless and the engine isn't any different between auto or manual either, the computer (ECU) is programmed different, but the engine itself isn't different. Today I ran across 3 2.9L V6 engines at the pick a part, 1 had the EGR system, the other 2 did not...1 was the 1988, another was an 86 and one was an 89.
Depending on the vehicle you got the engine from it may or may not have been equipped or someone already removed it.
I was told if you remove the EGR system by doing a block plate or whatever, the computer still thinks you have EGR, and will cause fuel economy loss as a result of that system no longer functioning...there isn't any power gain at all from not having the EGR valve VS having one. If your EGR valve isn't working, replace it. This is actually one emissions component that doesn't screw your fuel economy LOL.
As for disabling it in the ECU, I doubt that could be done in these old trucks...only thing someone could try would be an ECU from a truck not equipped with the EGR system and I'm not sure what years those were....my 88 Ford Bronco 2 doesn't have the EGR valve and it never had one as the intake isn't setup for one, but my 87 Ford Ranger does have the EGR valve which is causing issues right now on the highway, I believe the valve is bad as I'll go to accelerate while on the highway and I'll start losing power then its like that valve unsticks itself and then the power loss goes away. I think the valve may be getting stuck open and by doing so when I go to accelerate its trying to suck in too much exhaust gasses and its acting like its going to stall.