Hi dear members!


I have a V8 5000 engined Pontiac Firebird (91 year) with central injection system.

One time in mniddle of winter i start the engine, after when i waiting to warming up, the engine goes to crasy.


when the temperature meter 50 C, the engine fire back to airfilter, stoppig, ugly RPM.

But if the engine cold, all ok and nice running.


I try read the error code, from connector. The computer tell tom me 53 .

I found at here error codes.

53 is:

- big voltage in accumulator (checked.. no)
- wrong reference voltage (where i found the circuit for this?)
- high voltage in Exhaust Gas Recirculation valve (checked.. no)


Anybody have a thing for this stupid error???

Thank for the helping guys.


And sorry for my English, but i write from Central European


Thanks a lot.

 

Welcome Aboard!

There is nothing wrong with your English. It is much better than any Central European language I could speak or write.

The error code 53 is due to voltage in the system rising above 17.1 VDC. If the car was connected to a battery charger, start booster, or if the alternator or voltage regulator are failing, the system voltage can rise above that level. Damage to system components, including the ECM, can occur if voltage above that level is sustained. The higher voltage will also affect engine sensors, and will affect how the engine runs as a result.

I'd suggest you check the voltage with the engine running at normal temperature. Use a separate voltmeter, since the in-dash voltmeters are not always relaible. Anything over 15.0 VDC can indicate a problem with the alternator or voltage regulator.

You can disconnect the battery power for about ten minutes to clear the error code. Reconnect the battery and run the engine again to determine if the error code repeats.

 

Thank you Vader!

I try found the problem.

I clean up the EGR valve (so dirty and stopped on down position)
I change my accumulator to new, and make voltage checkings.

At now, 14,45 V on 1800 - 3000 RPM.


But...

I disconnect the CPU unit from main cables. I push back after one day. (i think may be this enough )

At now, the computer unit when i swith to blinking test mode, make this signals:

12, 12, 12, 12, 12, 12, 12, ....

I read from somewhere, this is the OK signal. (or not?... see the next lines)
At now the engine not go to crasy at 50 C.... But again no power if i play with gaspedal.

I think problem with:
- fuelpump
- fuelfilter
- catalisator (because this Firebird model have a air pipes from air-pump to exthaus system, and the air pump is death, i cut the airpipes, close down, and remove the airpump, and change the belt to shorter and make reverse rotation on water pump. But i think this catalisator need clean air to working....and death without clean air)

Today i will buy the other catalisator (same like this, but don't need air for operate... Egs 88 Camaro catalisator)


I think my problem is only the fuel pump, or a filter.
How i can check this units by my eyes (not with pressure meter) without pull down the gastank? I dont want remove the exthaus system, because is under garantie time, and the exthausmaker at now in holiday. Grrrhhh.


Other...

I download the WINALDL software, install to my old IBM notebook, and make the serial connector into my car.
I get lot of datas from CPU unit. But what i can do it with this datas?
So i don't know what is wrong....
Somebody (Mr. Vader eheheheh ) can help to me?
We can't make "WINALDL database" to this site?

 

The only way to check fuel pressure is with a pressure gauge. The ECM does not monitor fuel pressure, so a data scan of the ECM will not show any pressure reading.

 

Hi Members!

I solve the problem. I change the O2 sensor to oldest version, and the fuelfilter. From Camaro 1988. Because this engine not have clean air pump.

But for the O2 sensor need little manipulation in exthaus system. The oldest O2 sensor littlebit fat. I drill out the turbulens area in a hole of O2 sensor with Dremmel driller machine.

At now my engine is so mutch better than old time
- Lowest economy (12 L in 100 Km )
- softer runing
- no error codes
- bigest power.


When i finished the car, i put the pictures about.


Thank you guys for a helping.

 

It's good you got it fied. looks like it was maybe the o2 sensor that was dieing out perhaps. I have a question though. why did you use an O2 sensor that was to large? why not just by the replacement for that year which should have fit up in there without any problems?

 

Good job getting it running well again

I love the way the '91 Birds look... show pics!

 

Good to hear everything is running good,I would hate to have to get parts if you needed them considered where you are.

 

So, because i cannot find the original O2 sensor in Hungary in a midnight of sunday and i like the construction games


But i don't know why have different O2 sensor in Camaro 88'

Just + 2 mm fatted.