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94 LT1 running rough.

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Old Aug 6, 2023 | 07:07 AM
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From: Irymple, Vic Australia
Default 94 LT1 running rough.
Hi guys,
was driving our 94 the other night and it starting running rough. Heard a cracking noise and lifted the hood and had sparking at the coil wire.
Replaced plugs and wires and the sparking has stopped but car still stumbling. I have good spark at all plugs, but did notice when i checked them after running around the block that a couple of the plugs are pretty white, like the car is running lean. Replaced coil and ICM last year due to another issue.
Just looking for some suggestions.
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Old Aug 7, 2023 | 03:57 PM
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if you suspect a lean condition check fuel trim related sensors (TPS, O2 sensor and MAP) as well as inspect hoses for a vacuum leak
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Old Aug 7, 2023 | 04:59 PM
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From: Irymple, Vic Australia
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Originally Posted by dburgjohn
if you suspect a lean condition check fuel trim related sensors (TPS, O2 sensor and MAP) as well as inspect hoses for a vacuum leak
Thanks man, that's good advice. Not sure on how to test some of these sensors but i'll do some research!
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Old Aug 7, 2023 | 10:02 PM
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Originally Posted by Mung Bean
Thanks man, that's good advice. Not sure on how to test some of these sensors but i'll do some research!
if you have a scanner it will give info. If not a volt ohm meter can work
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Old Aug 8, 2023 | 07:09 AM
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Originally Posted by dburgjohn
if you have a scanner it will give info. If not a volt ohm meter can work
Yep, on to it. Heaps of videos on youtube! Thanks man.
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Old Aug 10, 2023 | 09:33 AM
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How clean is the Throttle Body?
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Old Aug 12, 2023 | 05:09 AM
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Originally Posted by signify
How clean is the Throttle Body?
ts not too bad, a little oil residue around the butterflies. What are you thinking?
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