Hello, My ‘85 seems to be dying as soon as Open the throttle body, It idles just fine but as soon as you accelerate even just a small amount, It will die. I have attached a video to help. Thank you

 

Probably something to do with the TPS sensor. Either out of adjustment or its gone bad.

With engine off, check the voltage on it at closed throttle and then monitor it as you open the throttle.

https://www.thirdgen.org/tpimod2/

 

It sure dies abruptly. 🧐
If you have a fuel pressure gauge, I would check it to rule it out.
Any stored codes ?

 

Brand new tps sensor

 

Check fuel pressure and it’s good

 

Hi the usual suspects are the following, MAF, TPS and fuel pressure. The mass airflow sensor and TPS are the main inputs, for progression from idle for fuel enrichment. You can disconnect a sensor and the ecm will use default values, it will run like crap but can help to identify a faulty part. As usual the car will set a fault code and illuminate the check engine light, so check for any fault codes. If tps voltage or maf signal is out of spec it will let you know what is causing the problem. However fuel pressure is not monitored, only if the pump relay looses power not if pump is failing... So as a result the ecm can get itself in knots compensating for an intermittant problem, disconnecting the battery and reconnecting it to reset the ecm sometimes helps restore drivability.

In my 20+ years of owning an 85, most issues to stalling were fuel pump or MAF related. So invest in a fuel pressure gauge, spare MAF spare fuel pump to keep on hand. they are quite reliable however think of them like a light bulb, can work one moment dead the next with limited warning. I never got more than 10 years out of a fuel pump on a weekend driven vette, had a MAF fail without warning and she would idle but die on acceleration. That was only one MAF failure though in 20 years, the car also told me what to look at due to a MAF fault code.

Good luck, should be a simple fix hopefully. As anything it can be made reliable with maintenance and new parts, My 85 was very reliable once I went through and slowly replaced all the common old electrical sensors and components. A well maintained car will not let you down, use good quality fuel and keep battery fully charged when not driving it often. Large voltage drops / spikes and poor connections are disastrous to electronic components.

 

Id still check it.