need your opinions, gen 3 with intermittent CEL but running well

[mutoy]

hi guys, what do you think of this?i have a 4cyl gen 3 1994... everyhting running well except that sometimes my CEL would come on while driving and would turn off after a while. it hasnt stayed on long enough for me to be able to diagnose it.

so one day i pulled over right away when the CEL came on, turned off the engine and did the paper clip method for obd1. i got a code 71 "egr system." my emissions inspection is due this month and i'm hesitant to go knowing the CEL can come on and off anytime. but more importantly, how do i fix this? which part of the egr is commonly at fault? should i just clean/replace the vsv, egr?

thanks

[BlueFusion6851]

Yeah the best way to diagnose a code like that is to either clean out both the VSV and EGR or replace them. But yeah, you have the basic idea down.

[GTSTWINCAM]

I too, have a CEL code 71 on my 91 Celica GT-S. Car runs fine. Comes and goes. My smog is due this month also and I was going to reset it before taking it to the smog place but afraid it will come back during the test.

Did you fix your problem?

Originally Posted by mutoy

hi guys, what do you think of this?i have a 4cyl gen 3 1994... everyhting running well except that sometimes my CEL would come on while driving and would turn off after a while. it hasnt stayed on long enough for me to be able to diagnose it.

so one day i pulled over right away when the CEL came on, turned off the engine and did the paper clip method for obd1. i got a code 71 "egr system." my emissions inspection is due this month and i'm hesitant to go knowing the CEL can come on and off anytime. but more importantly, how do i fix this? which part of the egr is commonly at fault? should i just clean/replace the vsv, egr?

thanks