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'84 Brat idle irregularity...

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This is an '84 Brat with fuel-injection and a Turbo. It used to run like a sewing machine...smooth as silk. Now, upon starting, it runs very rough and most times stalls soon after it starts. If I can get it to idle fast enough I might be able to get it to operating temperature but that's not a given since generally it won't stay running long enough. I should note that this problem is not consistent. On rare occasion it has just started right up and run smoothly however lately it either runs extremely rough down to a stall or it just won't start at all. This is even more odd: I have hit the steering wheel real hard....the first time out of sheer pissedoffness.:mad: ...and what happens? It suddenly starts running smooth like it had no problems. I know this Brat can't be playing games with me so what gives?:banghead:

I was thinking bad gas, until you came up with the hit the steering wheel deal. I just went thru a bad tank and had the same symptoms. It eventually cleared up.

Granted they are completely different; I had an issue similar to that with my first gen legacy. Turned out to be a bad MAF. Is your ECS light on?

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Granted they are completely different; I had an issue similar to that with my first gen legacy. Turned out to be a bad MAF. Is your ECS light on?

 

 

No dash lights showing any indication of a problem.

You were saying about getting it up to operating temp, does the problem still happen when your up to temp? If its on initial startups, I would almost think it has something to do with the thermosensor (coolant temp sensor, not for the gauge). But if you could give a little more info, that would help. Is it only on cold starts? What about a hot start, shut it off, come back 5 min later and run it again? I really think hitting the steering wheel was just a chance thing that it started running nice again. The other day my lifters were tapping....I tapped the hood and they stopped. :) That's what I mean by a chance thing.

When was the last time the filters were replaced?

+1 .. It kind of sounds like a clogging fuel filter to me. next after that i would check for vacuum leaks and fuel pressure.

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