EGR on 3FE

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Here is the pic. The ground is connected but what is this plug that is with it?
Also, the other pic. Is this crud saturated thing the PCV? Does it just pull off?
Thanks
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Knock on wood, i got rid of the hesitation and she seems to be running great. i did a quick plug of the EGR and the valve with plans to continue the rest of the desmog. took a trip down to San Fran and got a high of 15 and low of 13 mpg. includes the summits and SF driving. don't know if the plugging was the increase but she sure ran nice. except for a current prob with my driveline?
 
What exactly did you plug? I'm interested in this for a temp solution until I find the real problem, which I can't seem to find right now, which is disheartening. thanks jeff
 
So on the EGR valve you connected the ports together, right? What about the hose coming off the egr vsv, what did you do with that?

With the EGR modulator you just plugged the port (Q) that goes to the EGR valve, the single port in the back?

Thanks Jeff
 
By looking at my manual, it's the line going from the egr modulator to the egr valve. plugged the modulator. egr valve to the vsv (for egr) removed that line and plugged the vsv (for egr). the line that went from egr valve to modulator i wrapped that line around and plugged both sides of the egr valve. if this doesn't help, i'll snap a pic. ryan
 
Are there any adverse effects to running the EGR system bypassed like this? My 89' is having the exact same symptoms. Rough idle once warmed up. Sluggish until about 2500 rpm, then a surge in power. I'm also getting around 10 mpg.

Thanks!
 
Is bypassing the EGR like in the photos the same as removing the system? I need to keep system installed for emissions test every 2 years till the FJ is 25 years old.
 
I had the same result. I capped the four fittings effected by the bypass in your photos. It seemed like the idle smoothed out ever so slightly, the same with the surge at 2500 rpm. But both issues are still there. Thanks for the heads up on the 3FE group, I will check it out.
 
To add to this discussion: it seems to me that even with little to no carbon buildup, a 3FE will be susceptible to ping when the timing is advanced much. I'm piecing together parts to reinstall EGR on my rig so I can experiment with that and see if there's more power to be gained by having a properly working EGR and the timing set to 13 BTDC than by eliminating the EGR and only advancing a couple degrees.

At the very least, the more research I do on it, the more I'm lead to believe that if your EGR system is functioning correctly it won't hurt your performance at all. Comparing this EGR system to the one that was in place in my '74 Duster, it's a vastly simplified and improved system than what Chrysler monkeyed with back in the day.

rfj62, it looks like all your EGR stuff is damn near factory new. Did you replace the whole system recently?
 
Spook50 said:
To add to this discussion: it seems to me that even with little to no carbon buildup, a 3FE will be susceptible to ping when the timing is advanced much. I'm piecing together parts to reinstall EGR on my rig so I can experiment with that and see if there's more power to be gained by having a properly working EGR and the timing set to 13 BTDC than by eliminating the EGR and only advancing a couple degrees.

At the very least, the more research I do on it, the more I'm lead to believe that if your EGR system is functioning correctly it won't hurt your performance at all. Comparing this EGR system to the one that was in place in my '74 Duster, it's a vastly simplified and improved system than what Chrysler monkeyed with back in the day.

rfj62, it looks like all your EGR stuff is damn near factory new. Did you replace the whole system recently?
Click to expand...
Did you ever find out what advancing the timing did. I am having all sorts of the same issues as reported here including a cracked block in between the valves in cylinder three. I wonder if a stuck EGR valve, mine was, could cause the heat to be so high and localized to that number 3 cylinder that it would cause this and a misfire.

My car was running just like this.


I've been tracing lots of things down including, bad EGR, Bad PCV, Bad charcoal canister, bad metal piping for vacuum system, they should have gone with stainless, lots of rust in the vacuum lines.
 
valve adjustment and tps adjustment. go from there
 
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