Buick rendezvous randomly dies

20

Asked by Jun 20, 2017 at 04:55 PM about the 2003 Buick Rendezvous CXL

Question type: Maintenance & Repair

Car randomly dies. Says random misfire.
Replaced, fuel filter, pump, regulator, mass
air flow sensor, battery, wires and plugs,

8 Answers

285

I would check the coil packs, The bank that shows the random misfire will narrow things down.

2 of 2 people found this helpful.
20

How do you check coil pack? It Will stall driving uphill downhill idle just randomly Rpm drop, battery light coma On and car has no power.'pull over starts ok but can die again

1 of 1 people found this helpful.
285

What codes are you getting? Misfire codes: P0300, P0301, P0302, P0303, P0304, P0305, P0306. Do you see any of those? It may be something other than a coil pack. Is the engine light on ? You have the 3.1 or the 3.4 Set your ohmmeter to the 20000 ohms range. Turn on your meter and touch the spark plug wire terminals on one of the coils with the meter leads. You may get a reading between 5000 to 15000 ohms. This checks the secondary resistance. Set your ohmmeter to the 10 ohms range, and touch the terminal B+ (usually the center prong on the coil pack electrical connector) with one of the meter test leads, and touch the corresponding coil prong on the electrical connector with the other test lead. You may get a reading between 0.3 and 1.0 or more. This checks the primary resistance on each coil. Repeat steps 6 and 7 for each coil in the pack assembly, and compare your resistance readings to the specifications given in your vehicle service manual . If your readings are out of range, replace the coil or coils as necessary.

1 of 1 people found this helpful.
20

P0300, yes engine light on.

1 of 1 people found this helpful.
285

http://easyautodiagnostics.com/ Here is a link that will help with your G.M specifically. I hope this helps you out more. Eric

1 of 1 people found this helpful.
20

Thank you!

285

The above link is for testing the coil packs on the vehicle, you may not have all the test equipment needed. If you don't have them than pull teach coil out and use an inexpensive voltmeter and test in the Ohms range.

1 of 1 people found this helpful.
285

Your welcome Sara, I hope you Buick is running smooth very soon.

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