Q: Rebuilt 350 engine rebuilt Quadrajet carburetor with new computer. Nothing will connect to the computer, which is effecting my transmission.

asked by on

Original engine when purchased at 18 years old had 64,000 miles. It was is Pennsylvania and since owning 6 caprices all my life which all gave great service. Turns out original spark plugs still in and it wasn't till hitting 143 thou miles when the lifters could not be settled down from clatter. Purchased a new rebuilt 350 as could not find a 305 installed along with the rebult carb. While the old computer original engine and rebuilt carb all was good. Only when the 350 when installed was when the issue of 10 mpg got me to take it to electrical experts even bit the bullet and took to friendly GM service. 2 days later they wanted $1800 to install a new gm carb which in non existent . Didn't even charge me the $125 estimate charge I even purchased the computer for ob1 and ob2 no luck Engine stalls at will mostly at stop signs but scares when it just quits turning a corner. Question, 3 computers electric experts can't seem to find why the computer is not connection? Wirering or bad carb.

My car has 3500 miles.
My car has an automatic transmission.

Hi there. Check the wiring to the carburetor and see if the choke is coming on or staying off. The computer controlled carburetors are designed to meter the choke and fuel jets. If the wiring to the carburetor has power and a ground, then check the throttle position sensor (TPS) on the carburetor. The TPS could be failing causing the engine to stall out as it may be cutting off the fuel to the power valve in the carburetor. Electronic carburetors are the vision before the EFI was installed and is known as the system before EFI. If you need further assistance with your carburetor, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Rebuilt 350 engine rebuilt Quadrajet carburetor with new computer. Nothing will connect to the computer, which is effecting my transmission.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Steering wheel stiff

Hello. If the wheel takes a lot of effort to turn, the power steering system is likely the problem. The power steering system includes the pump, rack and pinion, pressure and return lines. Your issue is likely due to a...

Q: Battery jumped, but idling, missing, goes up/down

Hi there. This happens frequently on this vehicle when there is a loss of power. I usually start by checking the fuses to make sure that none of them failed during the jump. If they are fine then I scan...

Q: Too long of a crank to start car

It sounds like you may have a fuel supply problem in getting the proper amount of fuel to the fuel injectors. As you know, when you turn the key to on, the fuel pump is activated and the fuel system...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.