Piston Slap: The U Body, The Relay Bad Idle

U Relay Got A Problem? (photo courtesy: APaGttH)

TTAC Commentator APaGttH writes:

Sajeev!

Long time listener, first time caller. The patient: a 2005 Saturn Relay FWD3 with 151K miles, GM 3.5L V6 and 4-speed automatic. I am the fifth owner and this is our grocery getter and general abuse vehicle. I’m the longest owner – 4 years and about 55K of those 151K miles have been in my garage. I can’t comment on how well it was cared for from year 2 to year 6, but I have done everything by the book since 96K miles.

The Saturn developed a rough idle of sorts about a year ago. I swapped out the spark plugs, changed the fuel filter, and flushed the fuel injection. The car continues to idle rough. No CEL and no CEL history.

Read more
  • Kwik_Shift_Pro4X I will drive my Frontier into the ground, but for a daily, I'd go with a perfectly fine Versa SR or Mazda3.
  • Zerofoo The green arguments for EVs here are interesting...lithium, cobalt and nickel mines are some of the most polluting things on this planet - even more so when they are operated in 3rd world countries.
  • JMII Let me know when this a real vehicle, with 3 pedals... and comes in yellow like my '89 Prelude Si. Given Honda's track record over the last two decades I am not getting my hopes up.
  • JMII I did them on my C7 because somehow GM managed to build LED markers that fail after only 6 years. These are brighter then OEM despite the smoke tint look.I got them here: https://www.corvettepartsandaccessories.com/products/c7-corvette-oracle-concept-sidemarker-set?variant=1401801736202
  • 28-Cars-Later Why RHO? Were Gamma and Epsilon already taken?