Performance & Maintenance Engine, forced induction, intakes, exhausts, torque converters, transmissions, etc.

1992 SC400 Idles rough then dies

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Old 02-12-11, 04:44 PM
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vito324
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I just checked the clicking and it is coming from the throttle body area. And I have replaced the coils already so I wouldn't think that is the problem. As far as the squeal goes, I have to wait for someone to come crank it so I can listen.
Old 02-12-11, 04:44 PM
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I checked for codes, however, all I get is a constantly flashing light. Does that mean that there are no codes?
Old 02-12-11, 04:46 PM
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Yep, that means there are no codes stored. Interesting about the clicking. Do you have TRAC? Your TPS is the sensor closest to the inlet plenum and if you have trac, there is another sub throttle sensor inline with the TPS, directly in front
Old 02-12-11, 04:48 PM
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I wonder if the click is the sub throttle slamming open or closed. PUll your inlet ducting off and see that the sub throttle is wide open. Than turn your key to the acc position or whenever you hear this click and run up there to see if it has changed position.
Old 02-12-11, 04:51 PM
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vito324
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Yes I do have TRAC. And I am about to start testing all of the sensors. One more thing I forgot to mention earlier. I sprayed some starter fluid in the intake earlier and it ran for a few seconds, but was still running pretty rough.
Old 02-12-11, 04:53 PM
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Have you checked your IAC valve.
Old 02-12-11, 04:54 PM
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Where did you introduce the starter fluid?
Old 02-12-11, 04:55 PM
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I think I am leaning more towards the fuel system. Now with the fuel pump jumpered, you can hear fuel circulating in the engine bay?
Old 02-12-11, 04:56 PM
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Pulled the air filter, sprayed some, put the air filter back in, and started it.
Old 02-12-11, 04:58 PM
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Ughhh. Our MAFS are pretty sensitive. IF you don't have a code, should be ok still. So you introduced a combustible substance into the intake and it started. If it wont start without it, than fuel is not getting to the cylinders. When was the last time your fuel filter was changed?
Old 02-12-11, 05:01 PM
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And just to be clear, before it sat in the driveway for a week it was running fine??
Old 02-12-11, 05:03 PM
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Dunno. Hah. Just got the car about a month ago. I'm going to change that tomorrow though. But the TRAC butterfly is not moving with the click. But it is definitely coming from that area.
Old 02-12-11, 05:03 PM
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Yes it was running perfectly fine.
Old 02-12-11, 05:09 PM
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I wonder if nasties in the tank settled out and are now clogging the fuel filter. I would change that before moving on to anything else. Pretty messy. Do you have a set of feeler gauges
Old 02-12-11, 05:11 PM
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No I don't. But I'll definitely start with the fuel filter. But should I be hearing constant fuel in the engine bay when the ignition is only at the "ON" position?


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