need fuel pump volume test specs (quarts per minute) 0n a 1997 firebird 3800 please

Asked by Apr 16, 2014 at 12:58 PM about the 1997 Pontiac Firebird Trans Am

Question type: Maintenance & Repair

would shut off while driving in rain after dropping enough cylinders, I could see & hear wires arcing, & one tower on two different coils was not sparking. I pulled  each coil & checked for 12 volts & a pulsing ground while spinning over & found that one coil was not getting a ground pulse. After doing a compression test & all cylinders passed & a scan w/ my maxi das ds708 found only random misfire codes, I replaced three coils, ignition module, ignition wires, spark plugs, fuel filter & changed the oil which was way, way over do. I felt confident that his skipping issue was would be cured, I ASSUMED...which is always improper.  It is 85% better, & is not affected by moisture, but the car still skips like a little school girl. I have checked the secondary ignition and they all jump as far as the spark tester will open( past end of scale at 40,000 volts). No vacuum leaks, no smoke, no codes, & I can hear each injector ticking. The plugs look very dry and clean so I am thinking it's a lean misfire. The fuel pressure looks good, but the volume might be low at two quarts in one minute( from regulated system pressure check port on injector rail).  Last item, it runs to cold so I guess the thermostat is stuck open. After running for  twenty minutes the temperature needle has moved about five millimeters.

1 Answer

4,585

A stuck T-stat can mislead the ECM to try to run the engine rich. The O2 sensor will try to compensate but maybe it's out of range. The two issues together could cause misfires at speed. Its odd that the spark plugs are clean, but I would change the T-stat before doing anything else. Aside from that I would check the cam sensor and crank sensor (CPS) for proper voltage. Assuming the ECM is okay, either of those sensors can throw the spark timing off intermittently.

Your Answer

Add photo

Related Questions

  • need fuel pump volume test specs (quarts per minute) 0n a 1997 firebird 3800 please 1 answer

    would shut off while driving in rain after dropping enough cylinders, I could see & hear wires arcing, & one tower on two different coils was not sparking. I pulled each coil & checked for 12 volts &...

    1997 Pontiac Firebird Trans Am

    -

    Maintenance & Repair

  • 1997 firebird 1 answer

    I got a 1997 pontiac firebird and just a couple of days ago it started lagging in all the gears...there is no oil leaks and I just replaced all the spark plugs and hoses. The car was sitting for 8 mo...

    Pontiac Firebird

    -

    Maintenance & Repair

  • How to test fuel pump relay on 92 firebird 2 answers

    Have power to relay but no power to pump (at plug where it connects to pump)

    1992 Pontiac Firebird

    -

    Maintenance & Repair

  • Where is the fuel pump relay located on a 1995 Pontiac Firebird 2 answers

    Where is the fuel pump relay located on a 1995 Pontiac Firebird

    1995 Pontiac Firebird

    -

    Maintenance & Repair

  • Fuel Pump 1 answer

    What is the easiest way to change a fuel pump on a 95 Pontiac Firebird?

    1995 Pontiac Firebird Base

    -

    Maintenance & Repair

Search Pontiac Firebird Questions

Pontiac Firebird Experts

#1 Samuel Moore
Samuel Moore
Reputation 960
#2 dandyoun
dandyoun
Reputation 800
#3 John Saffrahn
John Saffrahn
Reputation 700
View All

Related Models For Sale

Used Chevrolet Camaro
242 Great Deals out of 31,193 listings starting at $369
Used Ford Mustang
543 Great Deals out of 45,845 listings starting at $1,999
Used Chevrolet Corvette
149 Great Deals out of 20,681 listings starting at $3,995
Used Ford Mustang SVT Cobra
6 Great Deals out of 267 listings starting at $5,750
Used Pontiac Grand Prix
30 Great Deals out of 2,863 listings starting at $1,600
Used Chevrolet Impala
591 Great Deals out of 34,068 listings starting at $899
Used Chevrolet Monte Carlo
20 Great Deals out of 1,419 listings starting at $1,995
Used Jeep Wrangler
261 Great Deals out of 16,543 listings starting at $2,590
Used Ford F-150
2,064 Great Deals out of 207,332 listings starting at $1,499

Used Cars For Sale

2002 Pontiac Firebird Trans Am For Sale
42 listings starting at $5,995
2001 Pontiac Firebird Trans Am For Sale
15 listings starting at $9,000
2000 Pontiac Firebird Trans Am For Sale
20 listings starting at $6,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.