My "Service Engine Soon" on my 91 Pont Firebird comes on about 5 to 10 minutes into driving. Anything?

Question

I have a 91 Pontiac Firebird 6 cyl. fuel injected, and a few months ago it started idling low, and as of a couple of days ago when i floor it, it doesnt have as much power as it did recently (it revvs to 3500 or 4000 instead of 5500 to redline. and now, shortly after i begin driving, the "service engine soon" light comes on, but when i shut it down, and start it again, it's off and its the same routine... any clues?

Answer 1

if a tuneup doesnt help it at all then youll have to have it looked at and put on a scanner/computer because we could be here all day with ppl guessing what it could be, as it could be one of about 200 diferent things
no one here can say what it is without seeing/scanning it
but if you have all kinds of money burning your pockets then you could start throwing new sensors in it lol

it only costs 40 to 60 bucks to have the car scan end at the dealer or a repair shop of your choice

so..


this would be the most cost effective solution, is to have it scanned

this comes with owning a car later than 1980

1981 was the beginning year of the very first computer controlled engine functions for GM it was called ESC/EST and it controlled timing and carburetor functions, but those you could read the check engine light trouble codes with a paper clip between two terminals of the ALDL connector under the dash by the steering column

unlike the '90s and newer vehicles




good luck

Answer 2

It most likely means you are in need of a tune-up and a fluid change most cars will start to run rough when the plugs start gettings burned up change the plugs, consider upgrading the wire kit and look at a possible engine flush you may have excess gunk built up, or after the tune-up get on the highway and get going
should help clean some of the carbon build up if you mainly do city driving. Good luck and also check your O2 sensor it may failing as well if you love the car get a diagnostics check done and then you will know exactly whats happening.

Answer 3

There is certainly something amiss. Go here----->

http://autorepair.about.com/library/ts/obd-i/bl-dtcs-97.htm

...and scroll down below the description chart for details concerning retrieving the trouble codes without a scanner. All it takes is a paperclip.
With the codes in hand, refer to a repair manual (Amazon, AutoZone, Library, etc) and follow the procedures outlined for proper DIAGNOSIS and subsequent repair.
When you get a code for a circuit or system do not assume that it is a failed component.
If you get a code for an oxygen sensor, there is a pretty good probability that the sensor has failed. But there is also a strong possibility that there is another cause, such as failing fuel pump or restricted filter, a vacuum leak, a failing MAP sensor, errant or defective fuel pressure regulator and on and on.
Do the diagnostics according to the manual and save money, time, effort and frustration.

Good Luck

Answer 4

That'll be generally Harley and cruiser bikers who endulge interior the sound of their loud pipes or their piece of junk that demands the engine to heat up somewhat. I experience a recreation bike and quite lots in basic terms enable the bike heat up 30-60 seconds and take off. maximum different recreation bikers I see do the comparable and don't usually rev up their engines formerly placing out or enable them to idle for a protracted time. particularly, my proprietors instruction manual on my Ninja ZX6 warns to not permit the egine to idle greater advantageous than 5 minutes.

Answer 5

If youve checked all the fluids and they are ok, Than Id probably guess its your o2 sensor. The thing is small and fairly inexpensive to replace, but they can cause havoc on the way your cars running.

Answer 6

sounds like it could be the throttle position sensor but to be sure you should get a code key (ask at autozone) and get the codes from the car and then go from there