cold idle

Mitsubishi Forum Classifieds Photo Gallery Timeslips Member List Search Sponsors Contact MF
Mitsubishi Lineup Mitsubishi News Recalls TSBs Timeslips Calendars Register Login

cold idle

Printable Version

Mitsubishi Forums >> Tech Help and Information >> Everything else >> cold idle

Page: [1] 2 next > >>

Message

<< Older Topic Newer Topic >>

cold idle - 3/28/2006 7:53:46 PM

chiefshoe

Posts: 3
Joined: 3/28/2006
Status: offline

91 sohc during cold idel my car idles rough and back fires but as soon as normal operating temp is reached no problems any ideas on how to solve this

Post #: 1

RE: cold idle - 3/28/2006 9:29:05 PM

slow420a

Posts: 2327
Joined: 8/8/2005
Status: offline

I think your caps button is stuck down, here is a little pic that may help you with that problem

Now for the back fiing and what know try changing the plugs and wires.

_____________________________

(in reply to chiefshoe)

Post #: 2

RE: cold idle - 3/28/2006 10:03:17 PM

stpracer

Posts: 1
Joined: 3/28/2006
Status: offline

Backfire out the exhaust or out of the intake? Could be a sticking choke, a vacumn leak, or an idle control value.

(in reply to slow420a)

Post #: 3

RE: cold idle - 3/28/2006 10:56:04 PM

slow420a

Posts: 2327
Joined: 8/8/2005
Status: offline

Its most likley going to be out the exaust, its an efi motor, the only efi motor that I have seen back fire out the intake was a ls1(really short intake runners) and it was spraying a huge dry shot. The back firing is caused by excess fuel exploding out side of the exaust valves. That can be atributed to bad spark or bad o2 sensors. O2 sensors need to be heated before they work right, but plugs and wires are cheaper thats why I recomened replacing them first. Insuficent spark is the cause of many problems.

_____________________________

(in reply to stpracer)

Post #: 4

RE: cold idle - 3/29/2006 6:29:40 AM

chiefshoe

Posts: 3
Joined: 3/28/2006
Status: offline

Thanks for the help, I replaced the plugs and wires in Jan however I will get and intermittent CEL 11 which is the oxygen sensor but currently the CEL is not on. So it looks like its time to spend the 90.00 for a new one.

Thanks again

PS I dont see and CAPS in the first post?????

< Message edited by chiefshoe -- 3/29/2006 6:31:07 AM >

(in reply to chiefshoe)

Post #: 5

RE: cold idle - 3/29/2006 7:57:58 AM

TheEngineer

Posts: 10734
Joined: 1/25/2006
Status: offline

thats wierd cuz i see the CAPS too....

$90 for an 02 sensor?! thats overpriced. You should be able to get one for maybe $50.

_____________________________

quote:

ORIGINAL: pilsenblue
Even tho My car looks great It will never be fast. Kinda like a hot girl that dosent give it up

(in reply to chiefshoe)

Post #: 6

RE: cold idle - 3/29/2006 8:24:59 AM

slow420a

Posts: 2327
Joined: 8/8/2005
Status: offline

quote:

ORIGINAL: TheEngineer

thats wierd cuz i see the CAPS too....

$90 for an 02 sensor?! thats overpriced. You should be able to get one for maybe $50.

I dont know about that one, I dont think i have enen seen one that low even on the net. For a gst oem one its 120 at the dealer, but on car-parts.com its 90 and change.

_____________________________

(in reply to TheEngineer)

Post #: 7

RE: cold idle - 3/29/2006 8:49:16 AM

TheEngineer

Posts: 10734
Joined: 1/25/2006
Status: offline

i got a cheap one from autozone.

_____________________________