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4bangstang
03-30-2010, 05:35 PM
My car has doe this for a long time. When I first start the car in the morning, the engine hunts until it is warmed up. Do you think it is a ECT since it is in open loop until it reaches a certain temperature.
Chuckles_5.0
03-30-2010, 05:46 PM
how cold are we talking about? mine usually hunts around for a while if it's good and cold. I think it's fairly normal.
4bangstang
03-30-2010, 05:53 PM
It hunts anytime I start the car with the water at ambient temp. It goes the rpm jumps a few hundred rpm's. It does this until the temp gauge reads about 140 ish degrees. Once I drive the car for about 10 minutes it idles smooth. It doesn't matter if it is cold out or not.
silentcarl
03-31-2010, 08:12 AM
Did you keep egr?
mustangpro
03-31-2010, 08:23 AM
I had a 91 mass air 2.3 Ranger that did this. Once I thoroughly decarbonized the EGR system it solved the problem.
nitrostangracin
03-31-2010, 10:42 AM
Sounds more like an EGR issue than an ECT issue. Have you checked for codes stored?
embler
03-31-2010, 05:53 PM
I would check for codes first and then do an idle reset. I have no egr on mine, it starts right up and idles around 1200 to 1300 when cold and back down to 1000 after its warmed up.
4bangstang
03-31-2010, 06:17 PM
I do not have an EGR. It is blocked off. I started it today after work. The rpms went from 500 to 1300 500 to 1300 again, again, and again for about 40 seconds. Then, after about a minute it stayed at 1500 for a few seconds and worked it's way down slowly to 1000 after 5 minutes. By this time the water temp was about 130 degrees. I have no vacuum leaks.
nitrostangracin
03-31-2010, 06:30 PM
I do not have an EGR. It is blocked off. I started it today after work. The rpms went from 500 to 1300 500 to 1300 again, again, and again for about 40 seconds. Then, after about a minute it stayed at 1500 for a few seconds and worked it's way down slowly to 1000 after 5 minutes. By this time the water temp was about 130 degrees. I have no vacuum leaks.

You still want to check and see if there are any codes stored. Even if the light is off.
silentcarl
04-01-2010, 09:57 AM
Unhook the IAC valve, and see if it does it again.
SVOCapri
04-06-2010, 03:57 AM
Unhook the IAC valve, and see if it does it again.

:yes1: Try cleaning the IAC with brake cleaner too.
4bangstang
04-15-2010, 09:47 PM
My issue was partly solved when I increased fuel pressure from 39 to 42 psi. I only hunts now for a minute then it smooths out. I think when I upgrade the fuel system it should be set.