Hesitation and backfiring

[cobra4202]

My 95 cobra Is having a problem , I'm not shure what's going on.
It will run perfect fo a couple of days, then it will start to have poor throttle
response while driving like a very bad hesitation and an occasional back fire.
Sometimes at idle the RPM's will jump to around 1200 and I can hear air
being pulled in by motor. I pulled the codes there were several for oxygen
sensors and a couple for EGR.
Any one have any ideas?

 

[duh09]

Re: 95 cobra needs help

I'm going to say your oxygen sensors need replacing at least.

 

[ivan12]

Re: 95 cobra needs help

Bad or dirty MAF sensor. Try cleaning out the sensor with denaturated alcohol (I believe that's how you spell it)

 

[paintslinga2010]

My car has done this a couple times. Once after i cleaned my air filter and put new oil and another after i drove through puddles. Both times i solved it by cleaning my maf with maf specific cleaner.

 

[2002BLGT]

sounds like a vacuum leak , post the actual code numbers you got from it , they will point you in the right direction to fix it for sure

 

[cobra4202]

The codes are: 172,173,181,186,189,327,334.
I cleaned the MAF, EGR valve, air intake temp,
it has improved but still not where it should be

 

[CC'S95GT]

o2's are next.
good luck

 

[hectorlzn]

Sounds like i had the same problem and it was the Idle Air Control on my case.

 

[vermilion]

if you hear air being sucked in like a whistle id look for a leaky gasket.

 

[Matt94GT]

vaccume leak would cause irratic idle would it not?

o2's could be tossing bad signals causing the backfiring possibly.

 

[birel21y]

Sounds like the computer is running the IAC fairly open, and is trying to compensate for a rich A/F mixture. Id try the O2 sensors.

 

[cobra4202]

Thanks guys I plan to swap o2's this weeekend I will keep you posted

 

[beuchaw94gt]

I'm having the same problem let me know if changing the o2s work.

 

[2002BLGT]

The codes are: 172,173,181,186,189,327,334.
I cleaned the MAF, EGR valve, air intake temp,
it has improved but still not where it should be

What mods are done to the car ?

 

[cobra4202]

The only mod's are a pro- flow 70 mm mass air kit , under drive pulleys and a catless h pipe

 

[cobra4202]

ccasion14: Sorry to take so long getting back, I finally
swapped the o2 sensors. She is running great!
Once again thanks for all the usefull feedback!

 

[beuchaw94gt]

Sweet!! Mine are on the way.