Rough Idle...

[Egon Spengler]

Hey guys. My car has been running a little rough at idle. My car is stock with the exception of a K&N CAI. I do not have a tune or anything. I plan on replacing the fuel filter, PCV Valve, and cleaning the K&N filter this weekend. I have 103,000 miles on her and just replaced the ORIGINAL BATTERY today! 7 years out of a battery isn't bad! There is no check engine light at this time indicating any problem. So here are my questions...

Where is the PCV Valve located just to make sure?
What product do I use to clean the intake, censors, and T.B.? Brakeleen?
What else could be the culprit here? Coils? what?

I really appreciate any help you guys can be. I am really concerned about this for money is tight and I would like to figure this on my own. I am very mechanically inclined and am just looking to get ideas of what to do here!

Thanks guys!!!:beer:
TJ:)

[sd8683]

Try cleaning the maf too.

[Egon Spengler]

I plan on it bud, but what should I use for a cleaner? I was thinking brakeleen, but I could be wrong and am looking to see what others use to clean the intake area/throttle body

Try cleaning the maf too.

[justbob]

PCV is on the passenger side cam cover. Use MAF safe cleaner. On the K&N, use the kit they sell at most FLAPS. Also clean your IAC, this acts up on mine quite often. Start with a fuel pump if it's been awile and go from there.

[Egon Spengler]

BOB
Thank you for the PCV Valve location
What is a IAC?
I have the recharge kit for the K&N from my dad.
What is a safe MAF cleaner? haha
I REALLY don't want to have to do a fuel pump on this thing! I am sure it is a nightmare!

[Phrog_gunner]

Don't use brake cleaner on the MAF. They sell a special MAF cleaner but if you can get electrical contact cleaner for cheaper, that is the same thing (it doesnt leave a residue like brake cleaner).

You will also probably need to clean the MAF again about a week after re-oiling the K&N.

Did you change your plugs at 100k?

[sd8683]

I think the brand of maf cleaner I use is CRC???

[Egon Spengler]

Phrog
Thank you for the MAF advice. I am hoping that is the culprit. and I will clean it after re-oiling.

I changed the plugs just before winter with around 90,000 so the plugs have around 13k on them.

Thanks!

[ImpalaSlayer]

BOB

I REALLY don't want to have to do a fuel pump on this thing! I am sure it is a nightmare!

actually, its really not that bad. if you do end up needing one, i have one you can HAVE

IAC stand for idle air control

[Egon Spengler]

I will keep that in mind! Where is the IAC located?

Man... I never knew that I didn't know this much about my car! haha

Do you have to drop the tank for the fuel pump?

actually, its really not that bad. if you do end up needing one, i have one you can HAVE

IAC stand for idle air control

[ImpalaSlayer]

I will keep that in mind! Where is the IAC located?

Man... I never knew that I didn't know this much about my car! haha

Do you have to drop the tank for the fuel pump?

the IAC is on top of the upper intake near the TB. has 2 bolts holding it on, should have aplug with 2 wires connecting to a small cylinder thing and its footprint is sort of a diamond shape. the whole thing is only maybe 2.5 inches long.

[ImpalaSlayer]

oh and no, you dont have to drop the tank

[justbob]

It's on the top right next to the TB. Here is a pic of a different ford, but looks the same.
http://i300.photobucket.com/albums/nn19/marauding4life/untitled22.jpg

[Egon Spengler]

Could I have a cops problem even throw it isn't throwing a CEL? the car seems a bit slower under acceleration too.

[justbob]

Most but not all bad Fuel pumps handle normal driving/idling fine. How does she feel WOT?

[ImpalaSlayer]

It's on the top right next to the TB. Here is a pic of a different ford, but looks the same.
http://i300.photobucket.com/albums/nn19/marauding4life/untitled22.jpg

whats the lil black thing on that one?

[justbob]

I'd be guessing here, but i would say a relief vent?

[Egon Spengler]

This is great information guys, should I use the same cleaner on the IAC as I do the MAF?

[justbob]

Yes. Just do this maintanence stuff first, and go from there.

[ImpalaSlayer]

This is great information guys, should I use the same cleaner on the IAC as I do the MAF?

would prolly work. maf cleaner seems very close to brake cleaner. just dont do the opposite of that (brake cleaner on the maf)

[Egon Spengler]

Any brand names or anything I should look for for a cleaner? If I go into a AutoZone and ask for a MAF safe cleaner will they know or look at me dumbfounded?

[ImpalaSlayer]

Any brand names or anything I should look for for a cleaner? If I go into a AutoZone and ask for a MAF safe cleaner will they know or look at me dumbfounded?

AZ carries a can called "maf cleaner". i believe its made by crc

[justbob]

+whatever. CRC used here and bought at Autozone.

[Phrog_gunner]

AZ carries a can called "maf cleaner". i believe its made by crc

Yes it should be CRC it comes in a gray can.

http://wreckedmagazine.com/mattpetty/wp-content/uploads/2008/09/crc-maf-cleaner.jpg

[ImpalaSlayer]

Yes it should be CRC it comes in a gray can.

http://wreckedmagazine.com/mattpetty/wp-content/uploads/2008/09/crc-maf-cleaner.jpg

thats the stuff

lol i love there HP gain claim

[Egon Spengler]

Thank you for the visual sir! I will go there after work today and grab some of it and try it out!

I love this website!

[Marauder Rick]

i saw your other tread, and yes..seafoam fixed this up for me.

[Ambitious1]

I know this is an old thread, however I am starting to notice some rough idle when I first start in the morning. As soon as the engine warms up, she smoothes out and she's fine for the rest of the day. I cleaned the CAI, replaced the MAF sensor and put two new 02 sensors. I am now thinking it may be the IAC. Before I buy more parts, I am curious what does everyone use to clean the IAC? I am thinking the CRC Throttle Body & Air-Intake Cleaner should work.

https://shop.advanceautoparts.com/p/crc-throttle-body-air-intake-cleaner-12-wt-oz-05078/7040065-P

Does anyone have any other suggestions or ideas? Thank you in advance.

[RF Overlord]

Yeah, that'll work.

[Chayton]

Someone mentioned you can change the fuel pump without dropping the tank. How?? My blue marauder stutters BAD when 3/4 throttle in any sort of TURN left or right. As you turn it stutters and then goes. Fuel pump?

[MyBlackBeasts]

Someone mentioned you can change the fuel pump without dropping the tank. How?? My blue marauder stutters BAD when 3/4 throttle in any sort of TURN left or right. As you turn it stutters and then goes. Fuel pump?


Run or pump fuel level down below fuel sender access hole, remove sender/pump, replace and reassemble. = Done

[justbob]

Run or pump fuel level down below fuel sender access hole, remove sender/pump, replace and reassemble. = Done



Also to add. Remove right side tail pipe from its hanger and pull down. Also remove tape from wiring directly above the access hole to allow enough slack to remove the pump.

The wiring turns down towards the pump but other wires keep traveling towards the passenger side, those wires stay, just separate them till you have enough.


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[Chi Stallion]

I know this is an old thread, however I am starting to notice some rough idle when I first start in the morning. As soon as the engine warms up, she smoothes out and she's fine for the rest of the day. I cleaned the CAI, replaced the MAF sensor and put two new 02 sensors. I am now thinking it may be the IAC. Before I buy more parts, I am curious what does everyone use to clean the IAC? I am thinking the CRC Throttle Body & Air-Intake Cleaner should work.

https://shop.advanceautoparts.com/p/crc-throttle-body-air-intake-cleaner-12-wt-oz-05078/7040065-P

Does anyone have any other suggestions or ideas? Thank you in advance. while the engine is running disconnect the IAC connector. The engine should stumble and die immediatley. If it does this, that means your IAC is good.

[crouse]

What do you clean the IAC with? Can you use MAF cleaner?

[RF Overlord]

MAF cleaner or coated throttle body cleaner. Don't use carb cleaner or Brakleen...