LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Moter intermittently cuts out for a second while cruising

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Old 05-20-2011, 08:55 PM
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Default Moter intermittently cuts out for a second while cruising

My car is randomly cutting out while idling or cruising, its like the ignition cuts off completely. I'm also getting a random P100 code but the MAF readings look fine. Not sure if this is a sign of the MAF going bad or if there is an underlying problem causing this.
Old 05-20-2011, 08:56 PM
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its the ******* optispark man!!!
Old 05-20-2011, 09:03 PM
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mine does the same thing on occasion. i wonder if it has anything to do with the TPS sensor
Old 05-20-2011, 09:14 PM
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i had that too, cleaned the maf and did a plug/wire change but didnt help. it eventually turned into a nasty backfire followed by my tires barking. it goes away once the high res fail code is finally thrown but then the car runs like poop until you shut it off for a while.
Old 05-20-2011, 11:39 PM
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Its your spelling module
Old 05-21-2011, 08:00 AM
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I had a similar problem a few years ago where the car would just cut out for a half a second or so at cruising, WOT whatever it didn't matter what RPM. The problem was intermittent, would happen a few times a day then no problems for a few days. I tried checking all usual suspects, MAF, Ignition Module, plugs, ground connections, wires, opti ect and the problem still remained. It turned out to be a weak battery, never got any indication of low voltage or charging problems although I never did check the charging system. Voltage always looked good on the dummy gauge, never any low voltage light or electrical problems with the lights, radio, ect. Came out to the car one day and the battery was completely dead, tried to jump the car and no luck. Replaced the battery and all my problems went away.

Not sure if this is your problem but something to look into.
Old 05-22-2011, 12:18 PM
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Originally Posted by 97pontta
I had a similar problem a few years ago where the car would just cut out for a half a second or so at cruising, WOT whatever it didn't matter what RPM. The problem was intermittent, would happen a few times a day then no problems for a few days. I tried checking all usual suspects, MAF, Ignition Module, plugs, ground connections, wires, opti ect and the problem still remained. It turned out to be a weak battery, never got any indication of low voltage or charging problems although I never did check the charging system. Voltage always looked good on the dummy gauge, never any low voltage light or electrical problems with the lights, radio, ect. Came out to the car one day and the battery was completely dead, tried to jump the car and no luck. Replaced the battery and all my problems went away.

Not sure if this is your problem but something to look into.
Battery is less than a year old. Checked it with a volt meter and it's at 12.5 volts off and 13.8 idling.

So far it hasn't skipped a beat at WOT but consdering the amount of time I'm cruising vs at WOT that doesn't mean much.
Old 05-22-2011, 01:12 PM
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mine did the same thing and it was the control module. WOT was fine, cruising was fine, but passing or getting on the highway it didnt want to run right.
Old 05-22-2011, 06:14 PM
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Maybe your Opti Harness? If that plug has dry rotted and looses connection it could cause some hesitation at idle and low cruising speed. Just my 2 cents.
Old 05-22-2011, 06:24 PM
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I would try unplugging the MAF and see if the problem continues when it is ignoring the MAF.
Old 05-22-2011, 07:00 PM
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Originally Posted by 96capricemgr
I would try unplugging the MAF and see if the problem continues when it is ignoring the MAF.
I'm swapping MAF's with the parents 00 WS6 tomorrow. It's still doing it even though there hasn't been a check engine light for the last couple days though.
Old 05-22-2011, 07:03 PM
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My blue LT1 car did the same thing. It turned out to be the little ignition module on top of the column. You can test your car to see if it is bad. Start your car in the driveway and then wiggle the key around. See if it starts to sputter. My car would randomly just shut right off at times, when the wheel was turned. It would only shut off for a half second or so. Scared the **** out of me, and it was totally random.
Old 05-22-2011, 08:37 PM
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Originally Posted by joelster
My blue LT1 car did the same thing. It turned out to be the little ignition module on top of the column. You can test your car to see if it is bad. Start your car in the driveway and then wiggle the key around. See if it starts to sputter. My car would randomly just shut right off at times, when the wheel was turned. It would only shut off for a half second or so. Scared the **** out of me, and it was totally random.
Did your gauges go dead when it happened?
Old 05-22-2011, 08:46 PM
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Originally Posted by speed_demon24
Did your gauges go dead when it happened?
Yep, just like someone turned the key off. It's actually the ignition switch not "module" like I stated earlier. When you turn the key to "ignition" there are skinny rods on top of the column that slide down and make contact enabling the circuit to happen.
Old 05-22-2011, 09:01 PM
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Originally Posted by joelster
Yep, just like someone turned the key off. It's actually the ignition switch not "module" like I stated earlier. When you turn the key to "ignition" there are skinny rods on top of the column that slide down and make contact enabling the circuit to happen.
My dash and everything I have wired into it still has power when it happens so I guess that rules that out. I'll still give the key a wiggle for the hell of it though.
Old 05-22-2011, 09:08 PM
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What the **** is a moter?
Old 05-22-2011, 11:02 PM
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wtf is a chaman doing in the ltx section?
Old 05-23-2011, 07:20 AM
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Check to make sure the leads on your power distribution block are tight. Same thing happened to me years ago and it turned out the nuts on both posts were loose.
Old 05-23-2011, 05:17 PM
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LS1 maf that I know for a fact that is good went on today, no more cutting out but that could be a coincidence. Got 4 new codes, P0132, P0152, P1133 twice. I'm leaning towards a short somewhere or what the man crush guy said.
Old 05-23-2011, 05:47 PM
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At least when you post now ss its more tolerable than with richard simmons lol


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