loss lots of power
#1
loss lots of power
Alright guys my 91 305 tpi been acting up had codes read but they were for a o2 sensor could that really cause my car to lose so much power that a 94 5 speed eg civic made me look like a sitting duck I also have full bolt ons
#2
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Join Date: Apr 2006
Location: Northern, CA
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Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: loss lots of power
You would be surprised how much of a roll some of the sensors sending information to the ECM play.
They all have to work together so the ECM can make adjustments.
Example = I broke the "little" plastic vacuum line going to the MAP sensor while changing the cap and rotor.
I figured OK Ill just drive to the local auto parts store to get some hose line but I wanted to see how the car would act without MAP .
My brother tried to start the car with me watching ,The air cleaner assembly
was still off.
When he turned the key I thought the car was exploding.
A tower of whatever the TBI could pump out shot up in the air.
Scared the s--t out of me.
So replace it and find out ....
They all have to work together so the ECM can make adjustments.
Example = I broke the "little" plastic vacuum line going to the MAP sensor while changing the cap and rotor.
I figured OK Ill just drive to the local auto parts store to get some hose line but I wanted to see how the car would act without MAP .
My brother tried to start the car with me watching ,The air cleaner assembly
was still off.
When he turned the key I thought the car was exploding.
A tower of whatever the TBI could pump out shot up in the air.
Scared the s--t out of me.
So replace it and find out ....
#3
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Car: 86 Z28 T-Top
Engine: Vortec 350
Transmission: 700R4
Axle/Gears: I think 3.73 open dif
Re: loss lots of power
Some cars have to have an O2 sensor to run proper. I had a 92 civic I pulled the O2 out off for 3 days and it ran fine but my brother in law had the O2 go bad in his late 80s Toyota truck and his fuel mileage dropped almost in half.
#4
Supreme Member
Re: loss lots of power
It all depends how the ECU is designed. Some have good calibration tables to fall back on in the case of a missing O2 sensor. Some will barely start. Stop racing your car and fix it properly.
#6
Supreme Member
Re: loss lots of power
Without the 02 sensor, The ECM will default to "limp home mode"
performance is non-existent when the "service engine soon" light is on.
performance is non-existent when the "service engine soon" light is on.
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theshackle
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09-17-2020 08:26 AM