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Old 07-07-2010, 10:55 PM   #1 (permalink)
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Default Idles too fast after restarting engine

When restarting the engine the engine idles too fast (only happens when the engine is at operating temp).

1.6L 8V

Has this happened to anyone?
Any ideas? Suggestions?
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Old 07-08-2010, 01:24 AM   #2 (permalink)
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will the 8v will race for 3 to 30 seconds (depend on coolant temp)
this is the dash pot functon then drop to 800 hot after this device retracts.
if no , something is wrong.

if it dont happen cold the for sure something is wrong.
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Old 07-08-2010, 03:32 AM   #3 (permalink)
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So, question is, when you restart your car and it is idling 'fast' (what exactly?) does it continue to do that, or drop to 800 rpm in a short period of time?
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'97 Suzuki Vitara 8v, 1.6L 5 sp, 4wd, 2dr, tintop, horribly purple
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Old 07-08-2010, 04:40 PM   #4 (permalink)
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Quote:
Originally Posted by Bex View Post
So, question is, when you restart your car and it is idling 'fast' (what exactly?) does it continue to do that, or drop to 800 rpm in a short period of time?
It continues idling too fast.
It never happens when the engine is cold.
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Old 07-08-2010, 05:29 PM   #5 (permalink)
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So, when you start your car from cold start, would it idle for about 3 seconds at about 2000 rpm, then drop to 1500, and slowly reduce to 800 as car warms up? That is normal. And then runs and idles at 800 rpm, even when warm? The high idle only happens when you re-start again when car is warm? Have you checked your TPS (throttle position sensor) and ISC (idle speed control)? Check out The KickFix Repair Pages, for Sidekicks and Trackers for the DVM tests on these. Any vacuum leaks?
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'91 Tracker 8V, 1.6L, 5 sp, 4wd, 2dr, conv, CAMI, horribly rusty
'97 Suzuki Vitara 8v, 1.6L 5 sp, 4wd, 2dr, tintop, horribly purple
'61 NSU Quickly - 150mpg
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Old 07-08-2010, 05:53 PM   #6 (permalink)
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what does.
Quote:
it never happens cold.
mean?




tell what it does,
hot.
cold.

the whole pictures tells us what might be failing.

hot starts , just after stopping.
hot soak restarts. warm motor.
cold starts.

im sorry to make it hard, but there are many items in the idle circuit.
5 to be exact. on a 8v.
so, those details, will show us which item is failing, or maybe 2 items failing.

see?
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Old 07-08-2010, 05:55 PM   #7 (permalink)
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ah , you never did spec out your car. why make us guess?, preplexed!
what you driving man?
year, mfg. model, displacement , tranny,door cound 2wd/4wd? 1.6L 8v dont cut it, sorry
what?
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Old 07-08-2010, 05:56 PM   #8 (permalink)
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on 89/90s the idle is way different. so.....................????????????????????????
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Old 07-08-2010, 06:18 PM   #9 (permalink)
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Quote:
Originally Posted by kick-fix View Post
what does. mean?




tell what it does,
hot.
cold.

the whole pictures tells us what might be failing.

hot starts , just after stopping.
hot soak restarts. warm motor.
cold starts.

im sorry to make it hard, but there are many items in the idle circuit.
5 to be exact. on a 8v.
so, those details, will show us which item is failing, or maybe 2 items failing.

see?
Cold, it starts OK, maybe idles a little fast for about a minute or less (it doesn't has a tachometer), then returns to normal idle, runs fine.

Warm, when stopping and restarting engine (without allowing it to cool off) sometimes it idles too fast, and stays fast until you stop and restart the engine again.
Other than fast idle, it runs fine.
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Old 07-08-2010, 07:35 PM   #10 (permalink)
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Please post the year, model, and specs of the car that you are driving (or better yet, put them in your profile so we don't have to try to hunt around to know what car you're driving). In the meantime, generally, when you start your car, 2 things happen. First it idles 'very' high for about 3 seconds or so, then drops down to 'medium' high idle. Does your car do that? This is governed by the dashpot. Afterward, your car remains idling 'medium' high and slowly drops to normal idle as the car warms up. This is governed by ISC. While waiting for specs on your car, you can do simple ISC test, by having car warmed up, idling, then putting the headlights and fan blower on. Does the idle change (drop down? stay the same?) It should not drop down, otherwise ISC is not working properly. Anyway, post your specs, and better answers will come.
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'91 Tracker 8V, 1.6L, 5 sp, 4wd, 2dr, conv, CAMI, horribly rusty
'97 Suzuki Vitara 8v, 1.6L 5 sp, 4wd, 2dr, tintop, horribly purple
'61 NSU Quickly - 150mpg
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