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Rough Idle - 1989 Ford Festiva L, Carbeurated


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sdfgsdfg
Novice

Feb 10, 2013, 11:11 AM

Post #1 of 11 (3256 views)
Rough Idle - 1989 Ford Festiva L, Carbeurated Sign In

I have a 1989 Ford Festiva L, Carbeurated Manual 4 Speed

It has a rough idle, I guess the best way to describe it is:

It idles inconsistently revving lower then higher, also runs rough when engine is cold for the first few minutes of driving

Check engine light turns on usually when engine is fully warmed up at high rev on the freeway

I have the engine codes: 70- Vacuum switch and 17-Feedback system

I have replaced all general tune-up items: spark plugs, cap, rotor, fuel filter
I have also replaced the O2 Sensor

Wondering if anyone knows what is wrong with it?


speed
User

Feb 10, 2013, 11:48 AM

Post #2 of 11 (3228 views)
Re: Rough Idle - 1989 Ford Festiva L, Carbeurated Sign In

Well i dont know about fords but it sounds like you definetly have a vacuum leak and that code for the vacuum switch definitely backs that up so i would be looking or listening for any vacuum leaks if you cant track it down take some carb cleaner and spray around the carb and intake and if it changes the idle worse thats where your leak is





GM ASEP 26 SCC Milford ASE certified in Brakes and Electrical on Thursday April 5th 2012


nickwarner
Veteran / Moderator
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Feb 10, 2013, 8:15 PM

Post #3 of 11 (3213 views)
Re: Rough Idle - 1989 Ford Festiva L, Carbeurated Sign In

this isn't a carb. Ford ended that after 86. You have TBI. I think you need to look for vac leaks too . Get some vac line in various sizes from the parts house in bulk for cheap. Change all of them them. Don't matter what they look like. Last time I trusted old rubber I got 18 years of child support.


Hammer Time
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Feb 10, 2013, 8:22 PM

Post #4 of 11 (3204 views)
Re: Rough Idle - 1989 Ford Festiva L, Carbeurated Sign In

Nick, The Festiva had an optional 2BBL in the 1.3 in that year.



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nickwarner
Veteran / Moderator
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Feb 12, 2013, 6:48 PM

Post #5 of 11 (3180 views)
Re: Rough Idle - 1989 Ford Festiva L, Carbeurated Sign In

Thats something new to me. Thought they got rid of that after 86. Haven't seem many of this vintage though in my neck of the woods. Salt killed them way too easy and they got scrapped.


Discretesignals
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Feb 12, 2013, 6:50 PM

Post #6 of 11 (3176 views)
Re: Rough Idle - 1989 Ford Festiva L, Carbeurated Sign In

Surprised that car is still alive and kicking myself.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


nickwarner
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Feb 12, 2013, 7:07 PM

Post #7 of 11 (3169 views)
Re: Rough Idle - 1989 Ford Festiva L, Carbeurated Sign In

Especially with the poster in Dearborn, they use salt too last I checked.


Discretesignals
Ultimate Carjunky / Moderator
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Feb 12, 2013, 7:13 PM

Post #8 of 11 (3168 views)
Re: Rough Idle - 1989 Ford Festiva L, Carbeurated Sign In

I wonder how the Festivas do traversing up and down the mountains?

Had a three cylinder Geo few years back that the customer complaint was the engine lack power going up some of the hills around here. I couldn't duplicate the issue, so the customer and his wife came to get the car. They must have had a combined weight of 600 pounds. Of course I kept my mouth shut.

Actually I wouldn't mind havin a 3 cylinder Geo Metro now with gas pricing going back up. 40 miles per gallon ain't too shabby for a mid 90's car.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Feb 12, 2013, 7:27 PM)


nickwarner
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Feb 12, 2013, 7:20 PM

Post #9 of 11 (3162 views)
Re: Rough Idle - 1989 Ford Festiva L, Carbeurated Sign In

Well, at least they had good traction. Up here we throw a couple hundred pounds of sandbags in the trunk for wintertime. Keeps the back wheels from locking up as easily during braking. RWD helps not spin out so much. If you get on an ice patch you can break open the bag and throw sand on the ice to get traction.


Discretesignals
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Feb 12, 2013, 7:23 PM

Post #10 of 11 (3158 views)
Re: Rough Idle - 1989 Ford Festiva L, Carbeurated Sign In

We do that down here too except we put golf bags in the trunk. Cool





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Feb 12, 2013, 7:23 PM)


nickwarner
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Feb 12, 2013, 9:37 PM

Post #11 of 11 (3147 views)
Re: Rough Idle - 1989 Ford Festiva L, Carbeurated Sign In

But the only time you drive over ice is when someone spills their drink on the road. My driveway is a skating rink.






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