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#1
05-17-2003, 02:23 PM
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Eclipse running rich
I have a 1991 Eclipse Gs 2.0 non turbo, that runs rich and has erradic idle, when it gets hot. I have replaced O2 sensor, put new exhaust on, and even a new throttle body on. I am thinking that it is the ISC, but I don't know how to check it. If anybody has any ideas, plz Email me I don't want to run out and buy a $200 dollar part if I don't have to.
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#2
05-17-2003, 02:58 PM
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Sounds like maybe your FPR(Fuel Pressure Regulator) is clogged or the vac. line is unplugged... thats the running rich part.
Idle surge can be caused by a BUNCH of things.... mis-adjusted BISS , bad ISC , FIAV is out of spec , you have vacuum leaks...etc. I have a '90 Galant with the 2.0 myself , that was having this same problem... If you need some in-depth advise..PM me and I can point you in several directions..... 
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