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Car Forum / Pontiac / Pontiac Firebird / May 2004firebird starts then stalls
89 Firebird 6cyl. Stepped on gas at red light (now turned green) and it died. Pushed it parking lot and this is the story: Turn the key and it starts and then stalls right out. Try again, it starts then stalls right out. After 2 or 3 of these it wont even sttempt to start. Wait 5 mintues, try again, same thing again. Have spark, changed coil, cap, rotor and module. Disconnected fuel line and pumped about 10 to 12 oz fo fuel in 15 seconds. The book says it should be 16 oz. IT was hard to measure in a 20 oz container. Does this sound like a fuel problem or electrical? Thanks Jeff > 89 Firebird 6cyl. > Stepped on gas at red light (now turned green) and it died. [quoted text clipped - 10 lines] > Thanks > Jeff I know last time that happened to me, it was the MAF sensor. Make sure you don't have any codes. -Bruce Thanks Bruce The only code we have is for the O2 sensor. I am assuming (for lack of a better term) that this sensor would be irrelevant in this case. Your opinion on this is also apprefciated. Jeff >> 89 Firebird 6cyl. >> Stepped on gas at red light (now turned green) and it died. [quoted text clipped - 15 lines] > >-Bruce >Subject: Re: firebird starts then stalls >From: jeff jeff31162@hotmail.com [quoted text clipped - 26 lines] >> >>-Bruce The sensor is reading whatever the computer is telling it in a way. Start with the basics. Check your fuel pressure with a reliable hand held gauge. Check for spark (constant). Yes a bad MAF or relay will stall it right out. Tap on the end of the MAF with the handle of a screwdriver. A lot of those early hot wire sensors were bad about things getting loose inside. Take a look at the MAF and gently clean it with electronics spray to see if that helps things out a bit. A cheap air filter will cause it to get gummed up. Joe--ASE Certified Parts Specialist & 10th Ann.Club Tech Director '80 Carousel Red Turbo T/A, 26k orig. '79 "Y89" 400/4 speed 10th Ann. T/A, 57k orig '84 Olds 88 Royale Bgm 2 dr, 307 "Rocket" (lol), 141k and still going.... '80 T/A project car... > >Subject: Re: firebird starts then stalls > >From: jeff jeff31162@hotmail.com [quoted text clipped - 43 lines] > '84 Olds 88 Royale Bgm 2 dr, 307 "Rocket" (lol), 141k and still going.... > '80 T/A project car... You can also disconnect the MAF sensor and try to start it, it should start but it will set the MAF code, I think it's a 33 or 34. Anyhow, if disconnecting the MAF sensor allows it to start, you have a good place to start your diagnosis.. -Bruce this is the one question that is damn near impossible to trouble shoot over the net. I know i tried. Anyhow I changed all the same things you did with no change in status. I just replaced my distributor and the problem was rectified. All aboard the Yankee express, next stop October..... >this is the one question that is damn near impossible to trouble shoot over the >net. I know i tried. Anyhow I changed all the same things you did with no >change in status. I just replaced my distributor and the problem was rectified. > >All aboard the Yankee express, next stop October..... the entire distributer? Anyway, it is starting to look like fuel pressure. Changing the filter got it to start and sputter and spit and stall some. Pressure guage on schroder valve reads zero, yet there is enough pressure to squirt fuel into the air. I would have expected to get a reading of at least a few psi. Guess we are gonna change the fuel pump OR, we are looking into an external fuel pump so we don't have to take the entire rear-end out. Anybody know anything about those? Will keep you all updated Jeff > >this is the one question that is damn near impossible to trouble shoot over the > >net. I know i tried. Anyhow I changed all the same things you did with no [quoted text clipped - 15 lines] > > Jeff Low fuel pressure can be more then a clogged fuel filter of a bad fuel pump. It could be clogged or restricted lines. Asfor an externial pump, your better just replacing the intank pump. Charles Well, we installed an external fuel pump and it runs like a champ! Hope it holds up. Thanks for all the input. Jeff >>this is the one question that is damn near impossible to trouble shoot over the >>net. I know i tried. Anyhow I changed all the same things you did with no [quoted text clipped - 15 lines] > >Jeff > this is the one question that is damn near impossible to trouble shoot over the > net. I know i tried. Anyhow I changed all the same things you did with no > change in status. I just replaced my distributor and the problem was rectified. > > All aboard the Yankee express, next stop October..... If you had to change the distributor, after changing the module, the coild, cap & rotor. Then the magnets were bad. I see this more in 88 to 95 G vans and C/K trucks. I recently had that problem with a 1990 C1500 W/T with a 305 ((5.0L)). The truck had sat for a few years. We had spark in from the coil & fuel to the injectors after changing modules. We changed cap and rotor since the were wasted. Still no spark, tore it down and swapped the magnets. Dropped it back in and had spark. $50 in parts to get a $300 truck running. Another $175 in parts to get it road worthy. Charles When you buy 6 dead trucks from a company at once you get a much better price. you are exactly correct, the magnet was shot, i don't believe i left that out of my post. anyway if you absolutly have to cut the rear deck out and change the pump with the tank still up. its a butcher job but it is faster and easier All aboard the Yankee express, next stop October..... |
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