1991 Chevy Beretta Cuts Out When Hot

1991 CHEVROLET TRUCK
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DAVEWEBB
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The car idles good but when you drive it on the road and it gets hot it cuts out real bad and loses power. We have changed spark plugs, wires, fuel filter, map senser and the injectors. We think its something simple but WHAT IS IT??? :(
Dec 11, 2006 at 2:58 AM
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82-454
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You said it gets hot. Then why don't you try and fix that problem first? Bad water pump?
Dec 11, 2006 at 12:22 PM
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DAVEWEBB
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When I said it gets hot, I meant when it gets to NORMAL operating temp. It does not overheat.
So the problem is, it IDLES fine. But when you are driving and it gets to NORMAL operating TEMP. It cuts out and loses power. We think it could be a sensor but not sure which one. What do you think??? :cry: :cry:
Dec 12, 2006 at 12:30 AM
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82-454
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Are you not getting any codes? The ignition module in the distributer could be bad.
Dec 12, 2006 at 6:17 AM
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DAVEWEBB
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[quote:a4e307cb0c="82-454"]Are you not getting any codes? The ignition module in the distributer could be bad.[/quote:a4e307cb0c]

Where is it located at on the car? We was getting a code 33 but we fixed that problem
Dec 14, 2006 at 12:12 AM
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82-454
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The distributor is where all the spark plug wires come out. I is usually inside. It's a small black box with wires plugged into it.
Dec 14, 2006 at 7:38 AM
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GTZ_RACER
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have you replaced ignition module yet just wondering if that has fixed it?
Jun 24, 2007 at 11:47 AM
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E40WATER12
  • ✓Experienced Mechanic
  • 522 POSTS
I would get each cyl compression tested, See if you got anything wrong there, Also are u getting any kind of deposits on youre spark plugs?. Could have a bad coil.
Jul 14, 2007 at 7:55 PM

Suggested Repair

Have each cylinder compression-tested and inspect the spark plugs for deposits. Also check the ignition coil, which may be failing once the engine reaches normal temperature.

Conversation Summary

A 1991 Chevrolet Beretta idles normally but cuts out and loses power while driving after reaching normal operating temperature. Spark plugs, wires, the fuel filter, MAP sensor, and injectors were already replaced, and a code 33 was previously corrected. It is not overheating. A reply suggested the distributor ignition module; the expert recommended a cylinder compression test, inspection of spark-plug deposits, and checking for a bad coil.

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