paldino Posted May 21, 2008 Share Posted May 21, 2008 I did the 100K service recently - new belts, water pump, spark plugs. The car runs like new, except that now I get a check engine light when rolling along in 5th gear. It reads as a Code 71 - One suggestion in the manual is a 1 - 4 second error in the EGR temperature, which I tend to believe. The question is, everything was fine before, so why am I geting this now? I suspect it is vacuum related, since the throttle body was removed to do the spark plugs. Any suggstions on troubleshooting. EGR appears OK its diaphram holds vacuum, opens and closes properly. Quote Link to comment Share on other sites More sharing options...
xaine Posted May 22, 2008 Share Posted May 22, 2008 make sure the electrical part is working or test resistance check all near by wiring check signal at ecu Quote Link to comment Share on other sites More sharing options...
paldino Posted May 22, 2008 Author Share Posted May 22, 2008 I did the 100K service recently - new belts, water pump, spark plugs. The car runs like new, except that now I get a check engine light when rolling along in 5th gear. It reads as a Code 71 - One suggestion in the manual is a 1 - 4 second error in the EGR temperature, which I tend to believe. The question is, everything was fine before, so why am I getting this now?I suspect it is vacuum related, since the throttle body was removed to do the spark plugs. Any suggestions on troubleshooting. EGR appears OK its diaphragm holds vacuum, opens and closes properly. Update: If anyone is interested I found these in the Mitchel service. They suggest using hot oil immersion for testing the resistance. EGR TEMPERATURE SENSOR RESISTANCE TABLE øF (øC) Ohms 112 (50) ................................... 64,000- 97,000 212 (100) .................................. 11,000- 16,000 302 (150) ...................................... 2,000- 4,000 Also Code 71 is a "two trip code" so it will not show up on the first test drive. You will need to shut off the engine, restart, and test drive again in order for the code to set again after being cleared. (or maybe not if you fixed it :-)) Quote Link to comment Share on other sites More sharing options...
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