Question about 1997 Pontiac Firebird

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Surging, loss of acceleration under load

Have replaced plugs, wires, fuel pump and filter. also changed maf sensor. still idles ok. runs good for first minute. then when I try to test drive it falls on its face. also changed coil packs and ignition module.

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  • Pontiac Master
  • 21,873 Answers

Have you checked the fuel pressure with a gauge, and is the check engine light on ? TPS check out with a meter ok ?

Posted on Feb 06, 2014

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

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Posted on Jan 02, 2017

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Anonymous

  • 99 Answers

SOURCE: runs good at idle but misses on acceleration

check your wiring at your ign module, could be moudle or ecm

Posted on Nov 30, 2008

muttandjeff

Allen Neal

  • 359 Answers

SOURCE: No power accelerating or going up a hill

HAVE SOMEONE CK THROTTLE POSITION SENSOR AND CATALYTIC CONVERTER MAKE SURE EXHAUST IS CLEAR

Posted on Feb 03, 2009

ROB

  • 858 Answers

SOURCE: 1992 Pontiac Grand PrixPower loss,erratic idle

spark plug gaps are very critical on computerised cars!! [some wont even start!]
distributor module may be breeaking down as temp rises they fail!
otherwise do compression check as it may have valve problems
also check plug leads & injectors aswell as the fuel pump pressure [ could bestarving for fuel]

Posted on Jul 18, 2009

Anonymous

SOURCE: runs hot already replaced fuel pressure sensor,

Other than the water pump your onto other issues Why all the new parts,who did that and why. Just asking. Stay with the other answers. Thermostat.Good Radiator flow,Fan working. Help us out here and stay within the coolant area.

Posted on Sep 29, 2009

jason jagodzinski

  • 110 Answers

SOURCE: i have a 99 grand am SE 2.4 4 cylinder and my

A misfire doesn't always have to be ignition... it's just the most common cause. Faulty or plugged injector, low compression. You need to check fuel pressure and test the fuel injector flow. Then check compression. If you don't have tools for these tests, take it to someone who does. Testing is much cheaper than throwing parts at the problem.

Posted on Feb 25, 2010

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