kurtblaze53

Terracan power loss hissing sound

I've got a head-scratcher with my 2002 Hyundai Terracan diesel. It's got about 86,000 km on the clock. Lately, I've noticed a significant drop in power, the engine's running rough, and it's jerking like crazy when I try to accelerate. Plus, there's this loud hissing sound under acceleration, almost like a vacuum leak, and the fuel consumption has definitely gone up. After some digging, I'm suspecting it might be the intake manifold flap control – possibly a defective switch. Anyone else had a similar experience with these airflow control issues on their Terracan?

A 2002 Hyundai Terracan diesel is experiencing significant power loss, rough engine performance, jerky acceleration, increased fuel consumption, and a loud hissing sound under acceleration. The suspected cause is a potential issue with the intake manifold flap control, possibly due to a defective switch affecting airflow. The suggested solution is to have the vehicle inspected and repaired at a workshop to address the airflow control issue.

Did this summary help you solve your problem?

4 comment(s)

Whoa, reduced power and hissing? Sounds familiar! I had similar symptoms on my Terracan. Jerky acceleration too, like the engine was struggling. Though, I never looked at the 'intake manifold flap control' myself... Where'd you get that idea?

Yeah, it's driving me nuts! The hissing is loudest under load. I read up on manifold flaps and their role in airflow control and engine performance. If the switch is busted, the flap might not be opening/closing properly, messing with the air intake and causing all sorts of havoc. Did you have the rough idling too? Any chance you remember what was causing it?

Okay, intake manifold flap, got it. Explains the hissing. Yeah, mine was idling rough as anything, like it was about to stall. Honestly, I couldn't diagnose it myself – too complicated. I just took it straight to the workshop. They sorted it pretty quick.

Right, workshop it is then. Thanks a bunch for confirming. Sounds like I'm on the right track at least. I'll get it checked out and let you know what they find. Looks like I might be looking at 465€ for the repair.

rmh_community_comment_box_header

community_crosslink_scanner_headline

community_crosslink_scanner_intro

community_crosslink_scanner_title

community_crosslink_scanner_price

community_crosslink_rmh_headline

community_crosslink_rmh_intro

community_crosslink_rmh_title

community_crosslink_rmh_subtitle

community_crosslink_rmh_brand

HYUNDAI

community_crosslink_rmh_model

TERRACAN