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  #1  
Old 09-28-2010, 11:39 AM
Deadokie21 Deadokie21 is offline
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Default Rough Idle Help please.

I start my truck and let it idle for a little bit its smooth but maybe 30 secs it drops and idles rough but then check engine light comes on. Everytime doesnt fail. the MAF and TPS seem to be good. Could it be the Ignition Control Module? How would u check if that is what is bad... Any other ideas throw them at me.
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  #2  
Old 09-28-2010, 01:55 PM
modelageek modelageek is offline
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Default Re: Rough Idle Help please.

Quote:
Originally Posted by Deadokie21 View Post
I start my truck and let it idle for a little bit its smooth but maybe 30 secs it drops and idles rough but then check engine light comes on. Everytime doesnt fail. the MAF and TPS seem to be good. Could it be the Ignition Control Module? How would u check if that is what is bad... Any other ideas throw them at me.
PLEASE CREATE A VEHICLE PROFILE LIKE MINE SO WE KNOW WAHT WE ARE WORKING WITH

I doubt it is the icm. you need to read the codes and post the actual numbers here..........what do you mean the maf and tps seem to be good. did you clean the maf or even look at? Do you have an aftermarket air intake?
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #3  
Old 09-28-2010, 02:26 PM
FireRanger FireRanger is offline
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Default Re: Rough Idle Help please.

In addition to all of the above, I would put money on pulling the IAC and TB and cleaning them will fix the problem.
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  #4  
Old 10-04-2010, 10:16 AM
Deadokie21 Deadokie21 is offline
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Default Re: Rough Idle Help please.

94 2.3L Ford Ranger Manual 5 Speed.
31's on 15's
3.5 Lift Front
3 in Rear..

And yes pulled and cleaned Both.
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  #5  
Old 10-04-2010, 10:34 AM
FireRanger FireRanger is offline
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Default Re: Rough Idle Help please.

Ok. Again without knowing the trouble codes, its hard to diagnose. You need to read the codes and post what they are. If you don't have a code reader, most autopart stores have them and will read them for free.
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2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
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  #6  
Old 10-04-2010, 10:42 AM
modelageek modelageek is offline
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Default Re: Rough Idle Help please.

Deadokie 21. What Brand Refrigerator do you have?
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #7  
Old 10-04-2010, 10:48 AM
modelageek modelageek is offline
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Default Re: Rough Idle Help please.

I doubt it is the icm. you need to read the codes and post the actual numbers here..........what do you mean the maf and tps seem to be good. did you clean the maf or even look at? Do you have an aftermarket air intake?
__________________
2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #8  
Old 10-04-2010, 10:50 AM
FireRanger FireRanger is offline
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Default Re: Rough Idle Help please.

Quote:
Originally Posted by modelageek View Post
Deadokie 21. What Brand Refrigerator do you have?
Maybe this went right over my head, but what do kitchen appliances have to do with a check engine light??
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2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
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  #9  
Old 10-04-2010, 11:06 AM
modelageek modelageek is offline
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Default Re: Rough Idle Help please.

Nothing. I was just being a wise guy because of what I perceived as sub par feedback
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #10  
Old 10-04-2010, 11:23 AM
Deadokie21 Deadokie21 is offline
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Default Re: Rough Idle Help please.

Ive tried to get the code reader.. i eather gotta buy one or find someone who has one.. stores here got into some trouble with them ( what the workers told me) lawsuit or sum bs. So tryin to just get the best idea as to what could cause it i still gotta clean the IAC.
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  #11  
Old 10-04-2010, 11:24 AM
Deadokie21 Deadokie21 is offline
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Default Re: Rough Idle Help please.

And i dont know the brand of my fridge lol :P
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  #12  
Old 10-04-2010, 12:43 PM
modelageek modelageek is offline
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Default Re: Rough Idle Help please.

So you need to spray the inside of the throttle body with throttle body cleaner not carb cleaner. You need to pull the MAF and spray the filament with a can of MAF. Cleaner. Then pull the IACV off and clean the Cavity out with one of those cleaners. Those are all maintenance items. Then get a code reader I got a Codekey reader at Costcos for $20. DO YOU HAVE AN AFTERMARKET AIR INTAKE?
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #13  
Old 10-05-2010, 02:43 PM
Deadokie21 Deadokie21 is offline
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Default Re: Rough Idle Help please.

No aftermarket intake. all stock under hood.
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  #14  
Old 10-10-2010, 08:43 AM
Frog Frog is offline
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Default Re: Rough Idle Help please.

Have you replaced your fuel filter?
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