Question about 1993 Pontiac Grand Prix

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1993 pontiac 3.1

When we put it in nuetral its fine in park its fine but surges at all stops in gear did replace idle sensor

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Check mass air flow sensor many times just cleaning the two wires that stretch across the inside with a Q tip and carb cleaner will restore in gear idle. If not, do code tests to see if any faults are recorded.

Posted on Jun 02, 2009

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Posted on Jan 02, 2017

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1 Answer

Idles fine wont stay running, surges


Get the fuel mapping sensor looked at. what type of car is it?

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I have a 1993 Honda Accord LX which idles with a "surge" while the car is in park...the "surge" goes away when you put it into gear. Any ideas?


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Code 23 engine idles but surges when in gear


Replace the Intake Air Temperature Sensor.
Depending on your size Engine (2.4L, 3.0L or 3.3L) It should be located where the Air Filter is. When you take the cover off, it wil be mounted into the cover. It has the only wires going to the cover.
This sends information to the Computer which adjust the air/fuel mixture - causing surges.
The 2nd recommednation: to remove, clean and check is the Idle Air Control (IAC) Valve and replace if necessary.

Let me know if this helped....


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Truck has been dying surging and dying when i come to stop at li


Try shifting to nuetral at stop signs for now. Will it keep running in gear with you foot on the brake? How about with the parking brake? You may have a simple vacuum leak at the brake booster.

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1997 Lincoln town car 281 cu in engine. The intake manifold was replaced due to the thermostat housing crack failure. Since then, there is an idle surge that disappears "off idle" -- about 1500 rpm. The...


Dirt may have got onto the O2 sensor, this could cause a surge without the light coming on. Some debris may be on a sensor preventing the computer from making correct adjustments.....

Feb 13, 2010 | Lincoln Town Car Cars & Trucks

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82 F150, fuel injection, 5.0 RPM's go high and idles high, happens when driving, when you stop and put in park or nuetral will die. found when we had very slight dusting of snow on the street, could not...


i would first check the idle position sensor,located where the throttle cable ends at the tbi. check for broken wires or hoses, try un-plugging and see if the problem goes away. get back to me if you need more help. please rate my fix. Thanks Ray

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