EGR Possibly stuck

HARIBO81

MEMBER
2007 HYUNDAI SANTA FE
2.2L
4 CYL
TURBO
4WD
AUTOMATIC
80,000 MILES

Hi guys. My vehicle seems to have detonation/spark knock while accelerating, also some slight hesitation if I hold it around 60 mph. I suspect the EGR valve so I sprayed some EGR cleaner through the intake and the detonation/rattle stopped for about twenty minutes before returning.

I plugged a scanner in to read the commanded EGR and EGR error values and I got "Commanded EGR - 38%, EGR error -99.2%" at idle.
"Commanded EGR - 5.1%, EGR error +88.3" at 2000 RPM.

Any input as to what these values mean in real terms.

Removing the EGR as soon as I can to clean and I am hoping this is the main issue.

3 Replies

HMAC300

MECHANIC
48,601 POSTS

Maybe a bad egr valve or plugged system what are the codes. Also if vacuum operated look for a vacuum leak going to egr

Was this

answer

helpful?

Yes

No

Friday, May 20th, 2016 AT 12:25 PM

HARIBO81

MEMBER
2 POSTS

Thanks for the reply.

No codes at all, and it's an electronic EGR. Just took it off this evening, cleaned and reassembled. Still the same noise just not quite as bad. Maybe injectors??