Question about 2002 Pontiac Firebird

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My 1989 Pontiac Trans Am has a 305 Tune Port Injection engine that won't start. There is spark in all electrical components, fuel pressure but still won't start. We have replaced the computer and still won't fire. The ICM unit was also replaced.

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  • kkevsr Oct 31, 2008

    93 pont bonneville ssei,good spark,good fuel pressure,new fuel regulater,newcrank shaft senser,new pcm,wont start.

  • isaac48z Nov 08, 2008

    I have the same engine. with pretty much the same problem,ive changed all the components besides the ECM an MAF.i can shoot it with starting fluid and it will start.if i dont,it wont catch at all,it will just turn over.





  • pepinofdz Mar 23, 2009

    My husband has a 1989 350 v8 trans am it will not start he has bought a new computer not only one several it will start with a different computer from a camaro but it will not work properly and the fuses, sensors everthing has been checked and it has been at the mechanic shop for two weeks and they cant get it to start

  • fbodytech May 11, 2010

    Start with the easy stuff first, you need fuel air and ignition. Check battery then timing. Make sure no valves are stuck. Check the distributor too. Is there fuel in each cylinder?

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I have inherited the same engine / Trams Am, it will start OK the next day but if left for a few days or more it will not firen not ever, but once a dose of aero start is used it fires up and runs fine, it can't be a shorted injector or it would not run, seems that the fuel runs out of the system and would need a huge battery to crank it for some minutes, and may still not go, one squirt into the injection manifold and it starts and keeps running, I have no clue why, new fuel pump was fitted, similar thing. seems cheaper to use aero start on it.

Posted on Jan 15, 2010

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CHECK INJECTOR PULSE IF SEEM IRRATIC UNPLUG EACH INJECTOR ONE AT A TIME AND SEE IF CAR FIRES NOTORIOUS PROBLEMS WITH SHORTED INJECTORS

Posted on Jun 17, 2009

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Come to find out after spending $560.00 on electric parts that were not needed, the number 5 fuel injector was shorting out causing the engine not to start. It would turn over but wouldn't catch. I unplugged the injector and it started right up. I let it run for a bit and while running, plugged it back in and sure enough, the engine stalled. This particular engine had us going crazy. We thought if an injector went bad at least have the engine would run. Apparently this one has a safety mechanism on it so half the engine won't warp for working while the other half don't. The injector will be replaced very soon and will be back in perfect running condition.

Posted on Sep 13, 2008

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I have a very strange problem with my Pontiac trans am 305 injection motor every time I make a right hand turn my car shuts down and won't start again feels and acts like it's out of fuel


I suspect that an electrical fault with the ignition system is causing this with power to the engine being shut off. I would begin with removing the cowling around the steering column and check your wiring to the ignition system.

If it is happening consistently then you are getting the car started again.

Dec 06, 2015 | Pontiac Cars & Trucks

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1988 toyota camry 2.0 turns over but won't start. Car has been driving like a champ and one morning wouldn't start. Turns over fine but won't fire. Tested for spark by removing spark plugs...


Fuel pressure at idle is normally 30-35psi. Start by taking the gas cap off, and putting it back on. That will De-pressurize the fuel system. Also, make sure you have gas in the car. I have seen gauges on these cars read wrong. I hope this helps.

Oct 05, 2011 | 1988 Toyota Camry

1 Answer

How to change the fuel pump on a 1996 Pontiac Transport


For 1996 Pontiac Truck Trans Sport 3.4L SFI 6cyl check this procedure for Fuel Pump... there are two different electric fuel pumps used:
- A medium pressure twin turbine pump for vehicles equipped with Throttle Body Injection (TBI). - A high pressure roller vane pump for vehicles equipped with Sequential Fuel Injection (SFI).
(see Figure 1)


d7f6f20.jpg


Fig. 1: View of the fuel pump assembly and related components
The fuel pump is mounted to the fuel sender assembly inside the fuel tank. The fuel is pumped to the engine at a specified flow and pressure by the fuel pump. Excess fuel is returned to the fuel tank by the return pipe. The fuel pump delivers a constant flow of fuel to the engine even during low fuel conditions and aggressive vehicle maneuvers.

CAUTION When working on or near the fuel tank, be sure to observe the information molded on the bottom of the tank.
Removal & Installation
  1. Disconnect the negative battery cable.
  2. Properly relieve the fuel system pressure.
(see Figure 2)


42fbc79.jpg

Fig. 2: Exploded view of the fuel pump-to-tank mounting components
  1. Drain and remove the fuel tank.
  2. Remove the fuel sender assembly.
  3. Disassemble the fuel pump strainer and the fuel pump: Note the position of the strainer in relation to the pump.
(see Figure 3)


c8d9af6.jpg


Fig. 3: Remove the fuel tank locking ring with a non-sparking (brass) punch.
  1. Support the fuel pump in one hand, and grab the strainer in the other hand.
    1. Rotate strainer in one direction and pull off pump. Discard strainer.
(see Figure 4)


3c2e4a1.jpg


Fig. 4: Exploded view of the fuel pump components
    1. Remove deflector.
  1. Disconnect the fuel pump electrical connector.
  2. Loosen the two connecting clamps, if equipped.
  3. Place the fuel sender assembly upside down on the work bench.
    1. Pull the fuel pump downward to remove it from the mounting bracket, then tilt the pump outward and remove it from the connecting hose or the fuel pulse dampener.
  4. It is recommended to replace the hose and clamps, if equipped.
CAUTION Do not run the pump unless submerged in fuel
To install:
  1. Push the fuel pump assembly into the attaching hose. Attach the pump electrical wires and fasten the hose clamps to the attaching hose and around the pump body, where equipped.
  2. Place the fuel tank sender and pump assembly into the fuel tank. Use a new O-ring seal during assembly.

Hope this help (remember rated this).

Jun 04, 2010 | 1996 Pontiac Trans Sport

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