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Engine dying problem
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Old 04-11-2016, 12:42 AM   #1
gf8Andy
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Default Engine dying problem

Can anyone diagnosis this problem i have?
-car dies when in neutral or even if im still holding the clutch and in gear
-only happens during the first few miles of driving, after that problem doesn't arise

few noteworthy stuff
-speed sensor went out but I've had my SS go out before and never had this problem
-checked MAF sensor and the throttle body because i heard those could cause the problem and both were fine
-no vacuum leaks, if that would cause the problem
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Old 04-11-2016, 09:38 AM   #2
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We dont know what type of car it is. We dont know what year it is. You really didnt post much information other than a general issue.
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Old 04-11-2016, 11:03 AM   #3
yarrgh
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I'm going to channel my inner Encyclopedia Brown (yeah, guess my age) and see from the user name that it's probably a wagon. A MAF sensor is mentioned, so it's probably 98 or earlier. Clutch is mentioned, so it's a manual.

What happens in the first few miles of driving? The engine heats up. The ECU knows this and changes fueling to account for a cold engine becoming warmer. It also keeps idle speed up.

I wonder if the IACV is slow to respond, or the ECT is acting up. But since OP didn't supply us with much to go on, all I can do is speculate.
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Old 04-11-2016, 11:32 AM   #4
Chuckles97obs
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I would check that IACV first also.. based on what little the OP gave us.
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Old 04-11-2016, 11:59 AM   #5
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Quote:
Originally Posted by yarrgh View Post
I'm going to channel my inner Encyclopedia Brown (yeah, guess my age) and see from the user name that it's probably a wagon. A MAF sensor is mentioned, so it's probably 98 or earlier. Clutch is mentioned, so it's a manual.

What happens in the first few miles of driving? The engine heats up. The ECU knows this and changes fueling to account for a cold engine becoming warmer. It also keeps idle speed.
But since OP didn't supply us with much to go on, all I can do is speculate.
I figured as much. The point I was trying to make is that you want to include as much information as possible when asking others to diagnose a problem, especially sight-unseen.
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Old 04-11-2016, 12:10 PM   #6
gf8Andy
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Apologies for lack of information, car is a 98 impreza obs 2.2. rpms just drop to zero after the first 5 minutes of driving. After driving for around 5 miles of non stop driving nothing happens

Last edited by gf8Andy; 04-11-2016 at 12:14 PM..
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Old 04-11-2016, 12:41 PM   #7
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I would check the IACV + TPS then if that fails perhaps your temp sensor. I got some weird idle issues until I took my TPS off and removed all the dead spiders from inside it. No kidding it was at least 4 dead spiders, not sure how they got into it, but once I cleared their corpses out and bolted it back together it idles like a champ.
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Old 04-11-2016, 03:35 PM   #8
yarrgh
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Quote:
Originally Posted by Jack_Stalk View Post
I figured as much. The point I was trying to make is that you want to include as much information as possible when asking others to diagnose a problem, especially sight-unseen.
Definitely agreed. I wasn't trying to undermine your post, and have chastised people for lack of information in the past.

For anybody else reading, it's not only helpful, but necessary to post all pertinent information if you're to receive any help through a screen. Year, mileage, recent work done, and of course, symptoms. Be as descriptive as possible and FILL OUT YOUR PROFILE!
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