RE: 08 Malibu engine speed control problem

Chevy Forum Chevy Classifieds Photo Gallery Chevrolet News Search Contact CF Sponsors
Member List Forum FAQ Chevy Timeslips Chevy Recalls TSBs Calendars Register Login

RE: 08 Malibu engine speed control problem

Printable Version

Chevrolet Forums >> Chevy Cars >> Malibu >> RE: 08 Malibu engine speed control problem

Page: << < prev 1 [2]

Message

<< Older Topic Newer Topic >>

RE: 08 Malibu engine speed control problem - 7/16/2008 6:03:49 AM

MizzouMan_2000

Posts: 14
Joined: 7/15/2008
Status: offline

Some sensor that is an input into engine speed control (i.e. mass air flow) has an intermittent signal that their software is not flagging as faulty

(in reply to MizzouMan_2000)

Post #: 11

RE: 08 Malibu engine speed control problem - 7/16/2008 6:04:00 AM

MizzouMan_2000

Posts: 14
Joined: 7/15/2008
Status: offline

OR the transmission is slipping.

(in reply to MizzouMan_2000)

Post #: 12

RE: 08 Malibu engine speed control problem - 7/16/2008 6:04:27 AM

MizzouMan_2000

Posts: 14
Joined: 7/15/2008
Status: offline

Thanks and sorry for the series of posts.. would not work in one post for some reason.

(in reply to MizzouMan_2000)

Post #: 13

RE: 08 Malibu engine speed control problem - 7/16/2008 12:50:17 PM

shawnvw

Posts: 1296
Joined: 1/18/2008
Status: offline

Could it be that the tranny is coming out of lock-up and back in again? giving you the engine speed changes.

_____________________________

If you have a question, ask it in the forums. I will no longer be answering questions sent to my email.

(in reply to MizzouMan_2000)

Post #: 14

RE: 08 Malibu engine speed control problem - 7/16/2008 12:57:48 PM

MizzouMan_2000

Posts: 14
Joined: 7/15/2008
Status: offline

Shawn,

That''''s one of the areas I wish they''''d test, but so far they have not! They''''ve been focusing only on an ECM and engine speed signal.

If that is what it is doing, then why would it do that?

Thanks!

< Message edited by MizzouMan_2000 -- 7/16/2008 12:58:30 PM >

(in reply to shawnvw)

Post #: 15

RE: 08 Malibu engine speed control problem - 8/24/2008 2:43:22 PM

uri14979

Posts: 1
Joined: 8/24/2008
Status: offline

This does sound like a torque converter lock-up issue. On most GM vehicles, transmission goes out of lock-up the second the brake pedal is depressed, so a faulty brake-pedal switch (the part that senses when the brakes are applied, right above the pedal itself) could cause this. Did you also notice cruise control disabling itself when this happens?

(in reply to MizzouMan_2000)

Post #: 16