1997 Pontiac Grand Am car hesatates

Tiny
SHORTY61
  • MEMBER
  • 1997 PONTIAC GRAND AM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
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
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Wednesday, July 9th, 2008 AT 2:30 PM

15 Replies

Tiny
DOCFIXIT
  • EXPERT
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
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Wednesday, July 9th, 2008 AT 3:04 PM
Tiny
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?
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Wednesday, July 9th, 2008 AT 3:47 PM
Tiny
DOCFIXIT
  • EXPERT
TPS throttle position sensolocated on throttle body
EGR exhaust gas recirculation valve intake manifold
ISC idle speed cotrol also located on the throttle body
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Wednesday, July 9th, 2008 AT 4:03 PM
Tiny
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.
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Wednesday, July 9th, 2008 AT 4:18 PM
Tiny
SHORTY61
  • MEMBER
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
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Wednesday, July 9th, 2008 AT 4:27 PM
Tiny
DOCFIXIT
  • EXPERT
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
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Wednesday, July 9th, 2008 AT 4:47 PM
Tiny
SHORTY61
  • MEMBER
Thanks we will try that.
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Wednesday, July 9th, 2008 AT 5:03 PM
Tiny
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
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Sunday, July 13th, 2008 AT 12:33 PM
Tiny
DOCFIXIT
  • EXPERT
Remove EGR check to see if pental is seated then clean ports, pental and the ports in the intake.
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Sunday, July 13th, 2008 AT 12:49 PM
Tiny
SHORTY61
  • MEMBER
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?
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Sunday, July 13th, 2008 AT 1:21 PM
Tiny
DOCFIXIT
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You have OBDII go to Auto Zone have it scanned for codes then post.
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Sunday, July 13th, 2008 AT 1:32 PM
Tiny
SHORTY61
  • MEMBER
Ok we got two codes one is p1621and the other is p0172
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Sunday, July 13th, 2008 AT 2:01 PM
Tiny
DOCFIXIT
  • EXPERT
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
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Sunday, July 13th, 2008 AT 2:11 PM
Tiny
SHORTY61
  • MEMBER
Ok what is a pmc and where is it
and no we didnt have it erazed but it didnt heastated down there and back
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Sunday, July 13th, 2008 AT 2:20 PM
Tiny
DOCFIXIT
  • EXPERT
Cars computer am not sure of location possible locations under pass side dash or engine compartment on fender
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Sunday, July 13th, 2008 AT 2:24 PM

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