1994 Lexus LS 400 "egr" Questions

code 71 0n lexus Code 71 says EGR problem. Clean the EGR modulator valve. Replace the EGR temp sensor. If this don't cure it check the EGR valve. Courtesy of Voodoo Auto Magic

...double. initially it had failed on both tests with readings in the 1400's and i changed out the egr valve with a used one. could egr be sticking? no cel and car runs fine. dont get how it reads ...

My egr wire harness plug that plugs into the egr, became brittle. And fell apart as I disconnected it. Is there a way to know which wire goes to which leg in the egr, I have a 94 Lexus ls 400. Car ...

...the fuel pump and the issue is happen what else could be causing this to happen MAP SENSOR OR egr VALVE plugged or stuck. Remove EGR and clean it with brake or carb cleaner and see that it

...When I get to 45 or above it jerks or shudders momentary then proceeds to the proper speed EGR Valve is a possible,maybeIf it has vacuum lines disconnect,plug& road test. If problem goes ...

can u tell me were the EGR VACUME SELINIOD IS LOCATED. Need to know what year and what engine size you have in order to help....

...told us it was the igniters but that didn't help either. What could our problem be? po400 is=egr valve system, exhaust flow malfuncion. Hope this helps.

...my 1994 LS400 has no acceleration in D1 has some in D2 and will accelerate in L. replaced leaking EGR tube, no help. Had diagnosed at Lexus dealer who said it was either vacuum leak needed to

...for ES300; GS300 & SC300 models) Code 52 Code 52 and Code 55 Knock sensor circuit fault Code 71 EGR system circuit fault (for ES300; GS300 & SC300 models) Code 78 Fuel pump control circuit ...

... I have the same issue and have not been able to trace it down.I have checked the ecu,airflow meter,egr,fuel pump it may be in the wiring or a relay although I tried a fuel pump relay.Have you fixed ...