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1989 warms up then runs bad until it stalls

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Old 10-16-2014, 01:44 PM
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aquajer
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Default 1989 warms up then runs bad until it stalls

Have a 89, the car sits mostly, went to do the Crusin the coast in Mississippi this year and car started acting bad once it warmed up, replaced injectors, cap, rotor, fuel pump. Also, before the car warms up if you push the gas peddle to the floor, the car will surge up and down, the gas pressure in the tank is very high, if I take the cap off quickly the engine will die.

Any suggestions

Jerry
Old 10-16-2014, 02:42 PM
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JC316
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Unplug the MAF and see if it runs. My 89 IROC was acting just like that with a bad MAF.
Old 10-18-2014, 05:59 AM
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Paul Workman
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Originally Posted by aquajer
Have a 89, the car sits mostly, went to do the Crusin the coast in Mississippi this year and car started acting bad once it warmed up, replaced injectors, cap, rotor, fuel pump. Also, before the car warms up if you push the gas peddle to the floor, the car will surge up and down, the gas pressure in the tank is very high, if I take the cap off quickly the engine will die.

Any suggestions

Jerry
Sounds like a sensor which only shows up in closed loop operation.

Get it scanned, refer to the FSM, and don't "shotgun" the problem. Otherwise you'll waste a lot of money, become frustrated, and you may still be "in the dark" with not only the original issue, but perhaps a new wrinkle stemming from a replacement part. (BTDT!) Don't have an FSM? Make it a priority, sez me. But, as I said, get it scanned.

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