Ok, fired up my motor tonight for the first time in 2 months(reringed). While I was putting it back in, I went ahead and made an EGR block off. Took it out tonite to start beaking it in and it runs great except at idle, really rough, sometimes it acts like it will stall unless I give it gas. What are some of the symptoms that may occur when I do block off the EGR. Or is there something I forgot to do? All I did was block off the EGR. Didnt unplug anything, didnt take off any vac lines.
#79373, "RE: Is it the EGR block off???" In response to Reply # 3
Rough idle, and motor running fine above idle, usually means your cam timng marks/timing belt was not set correctly. Check your timing marks to make sure..If you have a vacuum gauge, and your timing is off, it will have low vac at idle. It should be around 17-19 Hg's at idle..if not, then your timing is prob off..
13.5 @108 MPH-2.2 60ft(stupid FWD!) S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential fuel injection) My webpage: http://eclipsed4evr.home.comcast.net -1998 Mitsubishi Eclipse RS-T- "Toy" -1992 Plymouth Laser Turbo AWD(SOLD) -2000 Honda CR-V(daily)
#79401, "RE: Is it the EGR block off???" In response to Reply # 5
What year is your car? That will answer how your ECu is testing for the EGR.
Later model cars (98, 99 specifically) test EGR by completely closing the IAC while at the same time opening th EGR wide. If the motor starts to die and it does not see the correct alteration in narrowband O2 signal, it understands that the EGR either did not respond or did not allow sufficient recirculated exhaust gas into the system to keep the engine at idle. At this point it stores a code to flag later. If that situation repeats at another "trip" it will trigger the CEL. As aftermarket performance enthusiats, we all know the CEL is mostly a go-fast light, and as such the most notable symptom of a blocked EGR is an ilde drop every now and again when the ECU runs its test. it is not a constant issue and it will not cause a constant fucked up idle situation mainly because the EGR does not operate constantly, and the ECU's first goal is to keep the motor running.
Does that shed any light on the situation?
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'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#79402, "RE: Is it the EGR block off???" In response to Reply # 6
Originally posted by DarkOne What year is your car? That will answer how your ECu is testing for the EGR. Later model cars (98, 99 specifically) test EGR by completely closing the IAC while at the same time opening th EGR wide. If the motor starts to die and it does not see the correct alteration in narrowband O2 signal, it understands that the EGR either did not respond or did not allow sufficient recirculated exhaust gas into the system to keep the engine at idle. At this point it stores a code to flag later. If that situation repeats at another "trip" it will trigger the CEL. As aftermarket performance enthusiats, we all know the CEL is mostly a go-fast light, and as such the most notable symptom of a blocked EGR is an ilde drop every now and again when the ECU runs its test. it is not a constant issue and it will not cause a constant fucked up idle situation mainly because the EGR does not operate constantly, and the ECU's first goal is to keep the motor running. Does that shed any light on the situation?
#79476, "RE: Is it the EGR block off???" In response to Reply # 9 Aug-23-04 06:52 AM by DarkOne
95-96 and possibly 97 won't flag a flow code, but they check it the exact same way and will exhibit the exact same symptoms.
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'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
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I guess it just varies some in relation to the codes...