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What would cause a 89 buick to shut off when you come to a stop?
Wiki User
∙ 14y ago
>is the engine using carburetor or EFi as fuel supply ?
>manual or automatic transmission ?
>when was the last engine tune-up?
>is the engine compression still meets the specification ?
>perform engine tune-up as the first option.
>follow engine specified parts and proper/recommended procedure.
>standard procedure,
>replace sparkpugs, air filter element. fuel filter. change oil and filter. and check alternator voltage, check/clean/replace PCV , check/clean carburetor (if equipped), check all carburetor settings , automatic choke system, acceleration system, idling system and metering system, magnetic cut off switch,
basically the entire carburetor assy. replace base gasket upon reinstallation.
>adjust valves if necessary.
>check EGR system.
>check idling speed, (comes with tune-up procedure)
>check also for any vacuum leaks around the engine.
>check the vacuum hose and valve on hydrovac of your brake master cylinder.
any brake fluid leak within the hydrovac will dilute incoming air to the engine and may cause engine roughness to stalling.
>check for any abnormal noise from the hydrovac or behaviour of your brake pedal.
for EFI engine,
perform the above procedure but this time, is the throttle body that must be clean and settings recheck/reset.
last, check transmission for any internal trouble,
all above procedure is best if a scan tool or diagnostic tool is present for verification of work done,
Wiki User
∙ 14y ago
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