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Monte Carlo & Lumina Since the 1970s, the Monte Carlo has been an icon of American stock car racing. A 4-door version, the Lumina, was produced in the late 90's.
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Monte Carlo z34 lq1

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Old April 3rd, 2022, 3:38 AM
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hello, sorry bza my English I'm from czech.I want to ask my mom Monte Carlo z34 3.4 year 98 and on a longer trip when the engine shuts down then after starting it does not hold the idle speed turns off.But when I drive short the car is fine.please help..thank
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Old April 3rd, 2022, 9:47 AM
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Originally Posted by dan0210
hello, sorry bza my English I'm from czech.I want to ask my mom Monte Carlo z34 3.4 year 98 and on a longer trip when the engine shuts down then after starting it does not hold the idle speed turns off.But when I drive short the car is fine.please help..thank
Vacuum leak is probable.You'll have to track it down. If the vacuum hose are original, a big plus would be to replace them. Idle air control valve is another possibility. Do you have a check engine light?
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Old April 3rd, 2022, 10:38 AM
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Old April 3rd, 2022, 11:56 AM
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Originally Posted by dan0210
P1674 is faulty PCM. That would explain the misfire. The TPS code, I'd replace the sensor.
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