1997 Pontiac Grand Am car hesatates

1997 PONTIAC GRAND AM
140,000 MILES • 4 CYL • FWD • AUTOMATIC
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SHORTY61
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When we come to stop light our car hesatates when we give it gas ... put a new fuel filter and plugs and wires on it but it is still doing it ... today it quit on us but started right back up ... can u please help
Jul 9, 2008 at 2:30 PM
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DOCFIXIT
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Has the check engine light come on during the problem? If so go to Auto Zone they will pull the codes then let me know.
If no light check the TPS and EGR operation also ISC motor. Hope this helps
Jul 9, 2008 at 3:04 PM
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SHORTY61
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No light comes on ... i dont know alot about the abb.. u gave me but ig u can tell me what it is that would be helpful ... someone told us it might be the switch the regulates the fuel ???
Jul 9, 2008 at 3:47 PM
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DOCFIXIT
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TPS throttle position sensolocated on throttle body
EGR exhaust gas recirculation valve intake manifold
ISC idle speed cotrol also located on the throttle body
Jul 9, 2008 at 4:03 PM
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SHORTY61
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OK thanks that helps ... we r tring to figure it out cause some days it runs just fine and others runs like crap ... it runs good on long hauls if we dont have to stop at a light or something ,,, it just dont make since ...
Jul 9, 2008 at 4:18 PM
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SHORTY61
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and it didnt do this till we put cheap gas in it at shell mart ... we have put stuff in it to clean the injecters out but it aint helping either
Jul 9, 2008 at 4:27 PM
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DOCFIXIT
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Get yourself some MAF throttle body cleaner. The ISC is bolted to the area just behind the throttle plate. Remove and clean also remove tube from air cleaner to intake clean inside open plate spray real good.
Hope this helps
Jul 9, 2008 at 4:47 PM
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SHORTY61
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Thanks we will try that ...
Jul 9, 2008 at 5:03 PM
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SHORTY61
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we put a new idle speed control in it and took it for a test drive it is still doing it does it take a lil bit for the thing to fix it or is it something else
Jul 13, 2008 at 12:33 PM
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DOCFIXIT
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Remove EGR check to see if pental is seated then clean ports , pental and the ports in the intake.
Jul 13, 2008 at 12:49 PM
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SHORTY61
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the petal and stuff is cleaned ... we didnt disconnected the battery when we replaced the part would that have anything to do with it and also we were told that our car had a recall on its fuel pump could that be it ??
Jul 13, 2008 at 1:21 PM
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DOCFIXIT
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You have OBDII go to Auto Zone have it scanned for codes then post.
Jul 13, 2008 at 1:32 PM
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SHORTY61
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ok we got two codes one is p1621and the other is p0172
Jul 13, 2008 at 2:01 PM
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DOCFIXIT
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P1621 PCM memory performance that indicates malfunction in PCM only repair is replace
P0172 too rich which is probably the PCM not controling fuel and engine timing.
Did you have codes erased? if so drive and after it messes up recode you getP1621 replace
Jul 13, 2008 at 2:11 PM
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SHORTY61
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ok what is a pmc and where is it
and no we didnt have it erazed but it didnt heastated down there and back
Jul 13, 2008 at 2:20 PM
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DOCFIXIT
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Cars computer am not sure of location possible locations under pass side dash or engine compartment on fender
Jul 13, 2008 at 2:24 PM
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