SPONSORED LINKS

1994 Pontiac Grand Am loud poping backfire from throttle bo

Tiny
SEANSANCHEZ62
  • MEMBER
  • 1994 PONTIAC GRAND AM
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 194,000 MILES
I just replaced my fuel injectors with acel 19lbs fuel injectors eveything was fine for 2 weeks now when I punch the gas there is a loud poping backfire coming from throttle body and loss of power.
I have replaced;
plugs, wires msd coils, map sensor cam pos sensor, 02 sensor new fuel pump, fuel filter, cold air intake, throttle pos sensor. I need help!
SPONSORED LINKS
Wednesday, August 4th, 2010 AT 10:05 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Has the check engine light come on? Is that the actual mileage on the engine (possible bad intake valve)? Have you checked fuel pressure and regulator?
Was this
answer
helpful?
Yes
No
Wednesday, August 4th, 2010 AT 6:53 PM
Tiny
SEANSANCHEZ62
  • MEMBER
  • 2 POSTS
No, the check engine light is not on? I havent replaced the fuel pressure regulator but have replaced all other fuel components, I guess my question is it ok to install 19lbs injectors when stock run 17lbs do I need to upgrade anything, like I said there is only loss of power when I step on the gas. Thank you for your help it means a lot I have spent 2000 so far and still have issues im at a loss.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, August 5th, 2010 AT 1:43 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
It isn't a good idea to change the injectors. They should stay OEM pressure. If you have already changed them, that is most likely the problem. My god, you spent a lot. The truck I drive to work everyday only was 60 dollars and that was with a full tank of gas. (LOL) It needed the frame repaired. 20 minutes and that was done. Let me know if you have other questions.
Was this
answer
helpful?
Yes
No
Thursday, August 5th, 2010 AT 11:11 PM

Please login or register to post a reply.

Related Engine Backfire Content

How To Fix an Engine Backfire
VIDEO
How To Fix an Engine Backfire
Instructional repair video
Backfire Repair
GUIDE
Backfire Repair
When your engine backfires it can do so in one of two ways. First and the most common way is when the engine is running a small explosion of unburnt fuel is ignited inside...
VIEW MORE

Sponsored links