Question-------------------------
Followup To
Question -
Truck normally starts instantly, with high idle speed for a few moments and then idles down as I think it is supposed to. About 3 weeks ago it began spinning over for several seconds before starting and then slowly idling up to normal idle speed. If the weather turns cool, or it has been overnight, the engine will start like normal but when warm it has trouble. I have only changed the air filter and fuel filter, nothing else. Is there a choke equivalent on this engine. Any help will be greatly appreciated. I am the old school carburator kind of guy with very limited knowledge of TBI, etc. Truck has 110,000 miles but has been well maintained and normally runs great. Gas mileage seems to have suffered a little also, although 14 is the very best I ever got on it.
Thanks - Mike
Answer -
Hello Mike,
The idle air control valve acts kinda like a choke, so cleaning it might help. That can be done without even removing it....just use some spray carb cleaner.
A temperature sensor out of spec could also fit your symptoms.
See this article.
http://www.chevytalk.org/threads/showthreaded.php?Cat=0&Number=1366279
Van
Thanks Van,
Being unexpienced with this, can you tell me where the valve is? Also, where is the temperature sensor and do I check it with an ohm meter? Do you know what the reading should be? I truly appreciate you help.
Mike
AnswerHi Mike,
Go to that address I sent,
http://www.chevytalk.org/threads/showthreaded.php?Cat=0&Number=1366279
and near the top right hand corner of the window, there are some links. One says "Flat". Click on it, and it will display all of the posts to that question.
Then go to the home page. Sign up, and do some browsing. It is a great site, and completely free. I am on there all the time as Fixitfox33.
May see you there.
These specifications are from a 1993 light truck fuel & emissions manual. The specifications are the same for many different engines – coolant sensors.
Coolant sensor resistance specifications:
177 ohms @ 212 deg. F. or 100 deg. C.
241 ohms @ 194 deg. F. or 90 deg. C.
1802 ohms @ 95 deg. F. or 35 deg. C.
2238 ohms @ 86 deg. F. or 30 deg. C.
2796 ohms @ 77 deg. F. or 25 deg. C.
3520 ohms @ 68 deg. F. or 20 deg. C.
4450 ohms @ 59 deg. F. or 15 deg. C.
5670 ohms @ 50 deg. F. or 10 deg. C.
7280 ohms @ 41 deg. F. or 5 deg. C.
9420 ohms @ 32 deg. F. or 0 deg. C.
12300 ohms @ 23 deg. F. or -5 deg. C.
16180 ohms @ 14 deg. F. or -10 deg. C.
21450 ohms @ 5 deg. F. or -15 deg. C.
28680 ohms @ -4 deg. F. or -20 deg. C.
52700 ohms @ -22 deg. F. or -30 deg. C.
Van
