Recent Topics
Fear Getting Towed? You’ll Hate Watching This
by Falcon_LS
11/27/14 04:49 PM
Replacing parts before they fail
by Falcon_LS
11/27/14 04:17 PM
First Impressions: Cooper Discoverer H/T
by Falcon_LS
11/27/14 03:31 PM
Torn between tool brands
by renegade_987
11/27/14 12:34 PM
the beggars are really out in force today.
by Chris142
11/27/14 11:56 AM
New F150 specs
by hattaresguy
11/27/14 11:47 AM
WTB: 99 Miata roll bar
by Klutch9
11/27/14 10:56 AM
PP 5W30 Vs Total Quartz Ineo MC3 5W30
by Thugzy
11/27/14 10:11 AM
Let's talk about stolen cars
by MalfunctionProne
11/27/14 09:42 AM
Very Tempted but Sailun Tires
by rjundi
11/27/14 09:38 AM
Spicing up my chili
by racer12306
11/27/14 09:13 AM
AAP $50 off $100+ first 2000 customers.
by sayjac
11/27/14 09:05 AM
Newest Members
EdBurns, wolf9832, marine65, Focality, zimmersci
52011 Registered Users
Who's Online
85 registered (Alltherage, 05LGTLtd, aa1986, 97f150, 01_celica_gt, 77GrandPrix, 8 invisible), 1172 Guests and 177 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
52011 Members
66 Forums
222684 Topics
3525436 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#1701996 - 12/09/09 07:21 PM Car runs rough at idle
DreamerGT Offline


Registered: 07/09/09
Posts: 337
Loc: austin,tx
This is the code I get. P0352 Ignition Coil Primary B / Secondary Circuit Malfunction, all the cops(coil on plugs)are new about 8 months old and the spark plugs were replaced a year ago. I starts fine, its when its idling at a stop light or whatever it will go rough. But when I start driving it will drive rough for a little bit, then snap out of it and drive fine and have full power again. Any idea's? thanks
_________________________
02 Mustang GT,5w-20 Royal Purple, Redline D4
06 Pontiac Grand Prix GT 5w-30 Valvoline Maxlife

Top
#1702026 - 12/09/09 07:38 PM Re: Car runs rough at idle [Re: DreamerGT]
tig1 Offline


Registered: 01/03/09
Posts: 9956
Loc: Illinois
When the engine starts to idle rough pull over to a stop, leave the engine running and place a cloth up to the tail pipe. Don't completly close the pipe off but leave a slight gap between the pipe and cloth. If there is a miss it will suck the cloth up to the pipe with every miss fire. Ignition problem. It will make a pop pop sound with the miss. If no miss then look else where for your idle problem. Injector etc.


Edited by tig1 (12/09/09 07:40 PM)
_________________________
2007 Ford Fusion 146,000 miles
M1 0-20
2007 Ford Focus 130,000 miles
M1 0-20
10,000 mile OCIs on both engines
M1 ATF
M1 10-30 in all OPE

Top
#1702401 - 12/10/09 01:54 AM Re: Car runs rough at idle [Re: tig1]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
He already states that there is a miss.
Why check for it at the tailpipe? - that is silly.

Can you quickly disconnect power to each coil when it is misfiring?
A good coil/plug will show even worse, and a bad one no change.

Even though an ignition code is being thrown, it may be a vacuum leak or fuel delivery problem. Maybe even an EGR thing.
Sometimes computers give codes for left handed reasons.

Top
#1702418 - 12/10/09 02:49 AM Re: Car runs rough at idle [Re: mechtech2]
mechanicx Offline


Registered: 10/23/09
Posts: 8576
Loc: Ohio
I think that means there is a problem at coil number 2 or b. What kind of plugs and coils did you use as replacements? You might want to check the wiring harness to that coil.

Top
#1703260 - 12/10/09 06:16 PM Re: Car runs rough at idle [Re: mechanicx]
DreamerGT Offline


Registered: 07/09/09
Posts: 337
Loc: austin,tx
I got the coils off of ebay. Non oem all 8 for $70 and the plugs are standard motorcarft plugs. I will check the wiring harness and see what I come up with.
_________________________
02 Mustang GT,5w-20 Royal Purple, Redline D4
06 Pontiac Grand Prix GT 5w-30 Valvoline Maxlife

Top
#1703268 - 12/10/09 06:20 PM Re: Car runs rough at idle [Re: DreamerGT]
mechanicx Offline


Registered: 10/23/09
Posts: 8576
Loc: Ohio
Also if possible I think you could swap coils and if the problem moves with the coil you know that's it. Or maybe you could check the coils primary and secondary resistance against specs.

Top
#1703366 - 12/10/09 07:37 PM Re: Car runs rough at idle [Re: mechtech2]
Gary Allan Offline


Registered: 09/28/02
Posts: 39806
Loc: Pottstown, PA
Quote:
Maybe even an EGR thing.


That would produce a rough idle that totally evaporated in the upper power levels.

If you have a vacuum actuated EGR, then pull the hose off of the supply side and apply vacuum (suck on it). If the engine stumbles ..then it's probably closed like it should be. If nothing happens then it's probably stuck.
_________________________
http://lube-direct.com/gallan/

Top
#1704879 - 12/12/09 08:32 AM Re: Car runs rough at idle [Re: Gary Allan]
another Todd Offline


Registered: 05/15/06
Posts: 1706
Loc: Southern CA
Good point Gary.
_________________________
1996 Ford F53 Chassis motorhome
(2)2005 Ford Focus ZX4, and ZX5
2005 Ford Escape
2006 Ford Escape
2000 Chevy Silverado

Top