Buick Riviera Problem Report
Buick Riviera Check Engine Light due to vacuum leak in EGR tube
The EGR tube may develop an engine vacuum leak causing the check engine (SES) light to illuminate.
Check engine lights on has rough idol ran the codes which were too lean in bank 1 and control purge flow fault. Cleaned throttle body checked hoses cleaned fuel pump filter cleaned maf sensor checked for vaccume leaks finally went got estimate turns out my egr tube is cracked. Going to order part curious to know just where the tube is located. Hopefully I will be able to pas smog, which is the only reason im going to all this trouble. - p0ppyl0ve
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Apparently it's not the high pressure side so it has a leak. Well we went to put the uv leak fi...